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0F | 0C
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Tywydd 30 Diwrnod - Merthyr Tydfil

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65%

Siawns o Law

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9oC

Pwynt Gwlith

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93%

Lleithder

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97

Ozone

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11.03 mm

Gwlybaniaeth

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100600 hPa

Pwysedd

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Gogledd Gogledd Ddwyrain

Cyfeiriad y Gwynt

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93%

Gorchudd Cwmwl

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05:05 AM

Codiad haul

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09:05 PM

Machlud

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31%

Siawns o Law

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9oC

Pwynt Gwlith

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84%

Lleithder

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92

Ozone

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3.99 mm

Gwlybaniaeth

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102100 hPa

Pwysedd

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Gogledd Gogledd Ddwyrain

Cyfeiriad y Gwynt

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82%

Gorchudd Cwmwl

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05:05 AM

Codiad haul

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09:05 PM

Machlud

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17%

Siawns o Law

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10oC

Pwynt Gwlith

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79%

Lleithder

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110

Ozone

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0.52 mm

Gwlybaniaeth

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102700 hPa

Pwysedd

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Gogledd

Cyfeiriad y Gwynt

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86%

Gorchudd Cwmwl

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05:05 AM

Codiad haul

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09:05 PM

Machlud

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9%

Siawns o Law

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11oC

Pwynt Gwlith

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80%

Lleithder

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93

Ozone

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0.6 mm

Gwlybaniaeth

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102200 hPa

Pwysedd

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Gogledd

Cyfeiriad y Gwynt

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86%

Gorchudd Cwmwl

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05:05 AM

Codiad haul

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09:05 PM

Machlud

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27%

Siawns o Law

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11oC

Pwynt Gwlith

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82%

Lleithder

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95

Ozone

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5.06 mm

Gwlybaniaeth

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102300 hPa

Pwysedd

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Gogledd

Cyfeiriad y Gwynt

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52%

Gorchudd Cwmwl

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05:05 AM

Codiad haul

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09:05 PM

Machlud

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3%

Siawns o Law

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9oC

Pwynt Gwlith

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74%

Lleithder

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102

Ozone

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0 mm

Gwlybaniaeth

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102700 hPa

Pwysedd

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Gogledd

Cyfeiriad y Gwynt

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26%

Gorchudd Cwmwl

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05:05 AM

Codiad haul

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09:05 PM

Machlud

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2%

Siawns o Law

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8oC

Pwynt Gwlith

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71%

Lleithder

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103

Ozone

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0 mm

Gwlybaniaeth

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103200 hPa

Pwysedd

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Gogledd

Cyfeiriad y Gwynt

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52%

Gorchudd Cwmwl

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05:05 AM

Codiad haul

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09:05 PM

Machlud

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0%

Siawns o Law

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10oC

Pwynt Gwlith

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72%

Lleithder

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106

Ozone

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0 mm

Gwlybaniaeth

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103100 hPa

Pwysedd

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Gogledd

Cyfeiriad y Gwynt

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25%

Gorchudd Cwmwl

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05:05 AM

Codiad haul

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09:05 PM

Machlud

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0%

Siawns o Law

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10oC

Pwynt Gwlith

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73%

Lleithder

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104

Ozone

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0 mm

Gwlybaniaeth

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103000 hPa

Pwysedd

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Gogledd Gogledd Ddwyrain

Cyfeiriad y Gwynt

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13%

Gorchudd Cwmwl

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05:05 AM

Codiad haul

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09:05 PM

Machlud

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5%

Siawns o Law

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11oC

Pwynt Gwlith

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79%

Lleithder

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99

Ozone

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0 mm

Gwlybaniaeth

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102900 hPa

Pwysedd

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Gogledd Gogledd Ddwyrain

Cyfeiriad y Gwynt

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88%

Gorchudd Cwmwl

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05:05 AM

Codiad haul

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09:05 PM

Machlud

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1%

Siawns o Law

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11oC

Pwynt Gwlith

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74%

Lleithder

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105

Ozone

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0 mm

Gwlybaniaeth

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102800 hPa

Pwysedd

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Gogledd

Cyfeiriad y Gwynt

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25%

Gorchudd Cwmwl

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05:05 AM

Codiad haul

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09:05 PM

Machlud

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3%

Siawns o Law

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11oC

Pwynt Gwlith

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74%

Lleithder

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95

Ozone

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0 mm

Gwlybaniaeth

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102800 hPa

Pwysedd

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Gogledd

Cyfeiriad y Gwynt

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50%

Gorchudd Cwmwl

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05:05 AM

Codiad haul

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09:05 PM

Machlud

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4%

Siawns o Law

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11oC

Pwynt Gwlith

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70%

Lleithder

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110

Ozone

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0 mm

Gwlybaniaeth

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102500 hPa

Pwysedd

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Gogledd

Cyfeiriad y Gwynt

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10%

Gorchudd Cwmwl

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05:05 AM

Codiad haul

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09:05 PM

Machlud

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4%

Siawns o Law

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10oC

Pwynt Gwlith

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74%

Lleithder

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96

Ozone

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0 mm

Gwlybaniaeth

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102400 hPa

Pwysedd

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Gogledd Gogledd Ddwyrain

Cyfeiriad y Gwynt

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37%

Gorchudd Cwmwl

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05:06 AM

Codiad haul

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09:06 PM

Machlud

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5%

Siawns o Law

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4oC

Pwynt Gwlith

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64%

Lleithder

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110

Ozone

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0 mm

Gwlybaniaeth

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102900 hPa

Pwysedd

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Gogledd Gogledd Ddwyrain

Cyfeiriad y Gwynt

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26%

Gorchudd Cwmwl

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05:06 AM

Codiad haul

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09:06 PM

Machlud

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1%

Siawns o Law

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3oC

Pwynt Gwlith

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62%

Lleithder

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108

Ozone

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0 mm

Gwlybaniaeth

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103100 hPa

Pwysedd

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Gogledd

Cyfeiriad y Gwynt

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14%

Gorchudd Cwmwl

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04:06 AM

Codiad haul

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09:06 PM

Machlud

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4%

Siawns o Law

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4oC

Pwynt Gwlith

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63%

Lleithder

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100

Ozone

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0 mm

Gwlybaniaeth

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102900 hPa

Pwysedd

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Gogledd

Cyfeiriad y Gwynt

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9%

Gorchudd Cwmwl

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04:06 AM

Codiad haul

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09:06 PM

Machlud

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2%

Siawns o Law

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6oC

Pwynt Gwlith

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66%

Lleithder

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99

Ozone

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0 mm

Gwlybaniaeth

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102800 hPa

Pwysedd

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Gogledd

Cyfeiriad y Gwynt

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5%

Gorchudd Cwmwl

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04:06 AM

Codiad haul

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09:06 PM

Machlud

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1%

Siawns o Law

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8oC

Pwynt Gwlith

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67%

Lleithder

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97

Ozone

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0 mm

Gwlybaniaeth

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102500 hPa

Pwysedd

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Gogledd

Cyfeiriad y Gwynt

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5%

Gorchudd Cwmwl

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04:06 AM

Codiad haul

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09:06 PM

Machlud

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38%

Siawns o Law

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11oC

Pwynt Gwlith

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74%

Lleithder

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96

Ozone

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3.71 mm

Gwlybaniaeth

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101700 hPa

Pwysedd

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Gogledd

Cyfeiriad y Gwynt

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11%

Gorchudd Cwmwl

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04:06 AM

Codiad haul

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09:06 PM

Machlud

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9%

Siawns o Law

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10oC

Pwynt Gwlith

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77%

Lleithder

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100

Ozone

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3 mm

Gwlybaniaeth

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101100 hPa

Pwysedd

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Gogledd

Cyfeiriad y Gwynt

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59%

Gorchudd Cwmwl

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04:06 AM

Codiad haul

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09:06 PM

Machlud

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20%

Siawns o Law

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12oC

Pwynt Gwlith

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86%

Lleithder

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94

Ozone

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4.52 mm

Gwlybaniaeth

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101200 hPa

Pwysedd

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Gogledd

Cyfeiriad y Gwynt

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40%

Gorchudd Cwmwl

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04:06 AM

Codiad haul

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09:06 PM

Machlud

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9%

Siawns o Law

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10oC

Pwynt Gwlith

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75%

Lleithder

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105

Ozone

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0.12 mm

Gwlybaniaeth

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101600 hPa

Pwysedd

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Gogledd

Cyfeiriad y Gwynt

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89%

Gorchudd Cwmwl

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04:06 AM

Codiad haul

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09:06 PM

Machlud

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1%

Siawns o Law

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10oC

Pwynt Gwlith

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69%

Lleithder

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102

Ozone

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0 mm

Gwlybaniaeth

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101900 hPa

Pwysedd

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Gogledd

Cyfeiriad y Gwynt

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16%

Gorchudd Cwmwl

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04:06 AM

Codiad haul

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09:06 PM

Machlud

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3%

Siawns o Law

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11oC

Pwynt Gwlith

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72%

Lleithder

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105

Ozone

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0 mm

Gwlybaniaeth

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101800 hPa

Pwysedd

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Gogledd

Cyfeiriad y Gwynt

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32%

Gorchudd Cwmwl

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04:06 AM

Codiad haul

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09:06 PM

Machlud

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13%

Siawns o Law

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11oC

Pwynt Gwlith

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77%

Lleithder

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101

Ozone

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0.22 mm

Gwlybaniaeth

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102100 hPa

Pwysedd

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Gogledd

Cyfeiriad y Gwynt

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62%

Gorchudd Cwmwl

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04:06 AM

Codiad haul

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09:06 PM

Machlud

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2%

Siawns o Law

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6oC

Pwynt Gwlith

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62%

Lleithder

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105

Ozone

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0 mm

Gwlybaniaeth

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102400 hPa

Pwysedd

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Gogledd

Cyfeiriad y Gwynt

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8%

Gorchudd Cwmwl

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04:06 AM

Codiad haul

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09:06 PM

Machlud

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19%

Siawns o Law

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7oC

Pwynt Gwlith

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64%

Lleithder

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109

Ozone

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0.24 mm

Gwlybaniaeth

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101700 hPa

Pwysedd

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Gogledd

Cyfeiriad y Gwynt

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30%

Gorchudd Cwmwl

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04:06 AM

Codiad haul

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09:06 PM

Machlud

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27%

Siawns o Law

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11oC

Pwynt Gwlith

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80%

Lleithder

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93

Ozone

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3.07 mm

Gwlybaniaeth

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101100 hPa

Pwysedd

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Gogledd Gogledd Ddwyrain

Cyfeiriad y Gwynt

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83%

Gorchudd Cwmwl

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04:06 AM

Codiad haul

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09:06 PM

Machlud

Dydd Llun - 18
Dydd Mawrth - 19
Dydd Mercher - 20
Dydd Iau - 21
Dydd Gwener - 22
Dydd Sadwrn - 23
Dydd Sul - 24
Dydd Llun - 25
Dydd Mawrth - 26
Dydd Mercher - 27
light rain
light rain
light rain
light rain
light rain
light rain
scattered clouds
broken clouds
scattered clouds
few clouds
Tymheredd Uchaf
Tymheredd Isafswm
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5.73 mm
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11.03 mm
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3.99 mm
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0.52 mm
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0.6 mm
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5.06 mm
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0 mm
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0 mm
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0 mm
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0 mm
Gwlybaniaeth
Siawns o Law

18/05/2026

10o
rain
Glaw ysgafn
6oC / 11oC | teimlo fel 10oC
100% glaw | 0.38 mm
Lleithder 93%
Gweledigaeth 6.21 miles
Cyflymder y Gwynt 14.92 mph
Mynegai UV 3.98
Codiad Haul / Machlud Haul 05:16 AM / 09:03 PM
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