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0F | 0C
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Tywydd 15 Diwrnod - Portsmouth

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33%

Siawns o Law

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12oC

Pwynt Gwlith

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91%

Lleithder

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102

Ozone

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5.5 mm

Gwlybaniaeth

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101000 hPa

Pwysedd

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Gogledd Gogledd Ddwyrain

Cyfeiriad y Gwynt

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98%

Gorchudd Cwmwl

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05:05 AM

Codiad haul

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08:05 PM

Machlud

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10%

Siawns o Law

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12oC

Pwynt Gwlith

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85%

Lleithder

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102

Ozone

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0.45 mm

Gwlybaniaeth

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102300 hPa

Pwysedd

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Gogledd Gogledd Ddwyrain

Cyfeiriad y Gwynt

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48%

Gorchudd Cwmwl

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05:05 AM

Codiad haul

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08:05 PM

Machlud

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3%

Siawns o Law

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12oC

Pwynt Gwlith

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82%

Lleithder

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97

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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30%

Gorchudd Cwmwl

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05:05 AM

Codiad haul

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08:05 PM

Machlud

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5%

Siawns o Law

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14oC

Pwynt Gwlith

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89%

Lleithder

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107

Ozone

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0 mm

Gwlybaniaeth

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102600 hPa

Pwysedd

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Gogledd

Cyfeiriad y Gwynt

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60%

Gorchudd Cwmwl

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05:05 AM

Codiad haul

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08:05 PM

Machlud

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16%

Siawns o Law

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14oC

Pwynt Gwlith

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87%

Lleithder

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95

Ozone

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0.26 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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08:05 PM

Machlud

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13%

Siawns o Law

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15oC

Pwynt Gwlith

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90%

Lleithder

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95

Ozone

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0.1 mm

Gwlybaniaeth

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102900 hPa

Pwysedd

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Gogledd

Cyfeiriad y Gwynt

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82%

Gorchudd Cwmwl

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05:05 AM

Codiad haul

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08:05 PM

Machlud

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1%

Siawns o Law

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14oC

Pwynt Gwlith

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88%

Lleithder

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92

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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88%

Gorchudd Cwmwl

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05:05 AM

Codiad haul

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08:05 PM

Machlud

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12%

Siawns o Law

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14oC

Pwynt Gwlith

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87%

Lleithder

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90

Ozone

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0.25 mm

Gwlybaniaeth

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102100 hPa

Pwysedd

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Gogledd Gogledd Ddwyrain

Cyfeiriad y Gwynt

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47%

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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13oC

Pwynt Gwlith

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89%

Lleithder

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110

Ozone

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5.84 mm

Gwlybaniaeth

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102100 hPa

Pwysedd

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Gogledd Gogledd Ddwyrain

Cyfeiriad y Gwynt

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95%

Gorchudd Cwmwl

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05:05 AM

Codiad haul

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09:05 PM

Machlud

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16%

Siawns o Law

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9oC

Pwynt Gwlith

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73%

Lleithder

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90

Ozone

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0.41 mm

Gwlybaniaeth

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102600 hPa

Pwysedd

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Gogledd Gogledd Ddwyrain

Cyfeiriad y Gwynt

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21%

Gorchudd Cwmwl

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05:05 AM

Codiad haul

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09:05 PM

Machlud

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15%

Siawns o Law

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13oC

Pwynt Gwlith

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86%

Lleithder

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105

Ozone

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0.25 mm

Gwlybaniaeth

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102300 hPa

Pwysedd

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Gogledd Gogledd Ddwyrain

Cyfeiriad y Gwynt

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74%

Gorchudd Cwmwl

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04:05 AM

Codiad haul

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09:05 PM

Machlud

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9%

Siawns o Law

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9oC

Pwynt Gwlith

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73%

Lleithder

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90

Ozone

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2.25 mm

Gwlybaniaeth

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101500 hPa

Pwysedd

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Gogledd Gogledd Ddwyrain

Cyfeiriad y Gwynt

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32%

Gorchudd Cwmwl

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04:05 AM

Codiad haul

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09:05 PM

Machlud

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18%

Siawns o Law

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9oC

Pwynt Gwlith

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80%

Lleithder

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94

Ozone

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2.37 mm

Gwlybaniaeth

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102000 hPa

Pwysedd

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Gogledd Gogledd Ddwyrain

Cyfeiriad y Gwynt

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85%

Gorchudd Cwmwl

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04:05 AM

Codiad haul

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09:05 PM

Machlud

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65%

Siawns o Law

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10oC

Pwynt Gwlith

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87%

Lleithder

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108

Ozone

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11.31 mm

Gwlybaniaeth

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101700 hPa

Pwysedd

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Gogledd Gogledd Ddwyrain

Cyfeiriad y Gwynt

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96%

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
scattered clouds
broken clouds
light rain
light rain
overcast clouds
light rain
light rain
Tymheredd Uchaf
Tymheredd Isafswm
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3.04 mm
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5.5 mm
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0.45 mm
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0 mm
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0 mm
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0.26 mm
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0.1 mm
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0 mm
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0.25 mm
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5.84 mm
Gwlybaniaeth
Siawns o Law

18/05/2026

12o
cloudy
Cymylau wedi torri
8oC / 13oC | teimlo fel 12oC
80% glaw | 0 mm
Lleithder 77%
Gweledigaeth 6.21 miles
Cyflymder y Gwynt 19.35 mph
Mynegai UV 3.01
Codiad Haul / Machlud Haul 05:11 AM / 08:50 PM
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