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0F | 0C
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Tywydd 15 Diwrnod - Boston

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58%

Siawns o Law

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11oC

Pwynt Gwlith

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96%

Lleithder

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105

Ozone

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6.05 mm

Gwlybaniaeth

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100800 hPa

Pwysedd

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Gogledd Gogledd Ddwyrain

Cyfeiriad y Gwynt

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96%

Gorchudd Cwmwl

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04:05 AM

Codiad haul

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08:05 PM

Machlud

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22%

Siawns o Law

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12oC

Pwynt Gwlith

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90%

Lleithder

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109

Ozone

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4.84 mm

Gwlybaniaeth

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101800 hPa

Pwysedd

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Gogledd Gogledd Ddwyrain

Cyfeiriad y Gwynt

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90%

Gorchudd Cwmwl

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04:05 AM

Codiad haul

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08:05 PM

Machlud

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4%

Siawns o Law

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12oC

Pwynt Gwlith

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77%

Lleithder

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101

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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37%

Gorchudd Cwmwl

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04:05 AM

Codiad haul

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09:05 PM

Machlud

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3%

Siawns o Law

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13oC

Pwynt Gwlith

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78%

Lleithder

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101

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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70%

Gorchudd Cwmwl

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04:05 AM

Codiad haul

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09:05 PM

Machlud

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11%

Siawns o Law

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14oC

Pwynt Gwlith

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78%

Lleithder

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104

Ozone

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2.78 mm

Gwlybaniaeth

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102700 hPa

Pwysedd

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Gogledd

Cyfeiriad y Gwynt

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45%

Gorchudd Cwmwl

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04:05 AM

Codiad haul

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09:05 PM

Machlud

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0%

Siawns o Law

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13oC

Pwynt Gwlith

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78%

Lleithder

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110

Ozone

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0 mm

Gwlybaniaeth

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103000 hPa

Pwysedd

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Gogledd

Cyfeiriad y Gwynt

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65%

Gorchudd Cwmwl

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04:05 AM

Codiad haul

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09:05 PM

Machlud

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4%

Siawns o Law

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13oC

Pwynt Gwlith

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78%

Lleithder

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101

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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39%

Gorchudd Cwmwl

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04:05 AM

Codiad haul

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09:05 PM

Machlud

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8%

Siawns o Law

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14oC

Pwynt Gwlith

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77%

Lleithder

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93

Ozone

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2.28 mm

Gwlybaniaeth

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102100 hPa

Pwysedd

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Gogledd

Cyfeiriad y Gwynt

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36%

Gorchudd Cwmwl

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04:05 AM

Codiad haul

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09:05 PM

Machlud

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25%

Siawns o Law

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11oC

Pwynt Gwlith

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92%

Lleithder

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105

Ozone

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4.72 mm

Gwlybaniaeth

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102400 hPa

Pwysedd

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Gogledd Gogledd Ddwyrain

Cyfeiriad y Gwynt

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98%

Gorchudd Cwmwl

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04:05 AM

Codiad haul

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09:05 PM

Machlud

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8%

Siawns o Law

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7oC

Pwynt Gwlith

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65%

Lleithder

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110

Ozone

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0.26 mm

Gwlybaniaeth

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102500 hPa

Pwysedd

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Gogledd

Cyfeiriad y Gwynt

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21%

Gorchudd Cwmwl

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04:05 AM

Codiad haul

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09:05 PM

Machlud

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17%

Siawns o Law

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13oC

Pwynt Gwlith

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86%

Lleithder

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91

Ozone

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1.7 mm

Gwlybaniaeth

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101900 hPa

Pwysedd

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Gogledd Gogledd Ddwyrain

Cyfeiriad y Gwynt

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82%

Gorchudd Cwmwl

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04:05 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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81%

Lleithder

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94

Ozone

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5.76 mm

Gwlybaniaeth

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101000 hPa

Pwysedd

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Gogledd Gogledd Ddwyrain

Cyfeiriad y Gwynt

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82%

Gorchudd Cwmwl

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04:05 AM

Codiad haul

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09:05 PM

Machlud

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30%

Siawns o Law

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10oC

Pwynt Gwlith

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91%

Lleithder

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92

Ozone

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5.15 mm

Gwlybaniaeth

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101700 hPa

Pwysedd

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Gogledd Gogledd Ddwyrain

Cyfeiriad y Gwynt

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91%

Gorchudd Cwmwl

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04:05 AM

Codiad haul

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09:05 PM

Machlud

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21%

Siawns o Law

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9oC

Pwynt Gwlith

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89%

Lleithder

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90

Ozone

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5.4 mm

Gwlybaniaeth

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101900 hPa

Pwysedd

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Gogledd Gogledd Ddwyrain

Cyfeiriad y Gwynt

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98%

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
broken clouds
scattered clouds
light rain
light rain
Tymheredd Uchaf
Tymheredd Isafswm
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3.07 mm
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6.05 mm
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4.84 mm
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0 mm
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0 mm
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2.78 mm
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0 mm
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0 mm
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2.28 mm
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4.72 mm
Gwlybaniaeth
Siawns o Law

18/05/2026

12o
cloudy
Cymylau wedi torri
7oC / 15oC | teimlo fel 11oC
30% glaw | 0 mm
Lleithder 71%
Gweledigaeth 6.21 miles
Cyflymder y Gwynt 6.17 mph
Mynegai UV 2.7
Codiad Haul / Machlud Haul 04:58 AM / 08:55 PM
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