List of largest cities in Jersey

Saint Helier
St Helier
Weather, climate, temperature by months in Jersey
Season | Autumn | Winter | Spring | Summer | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Month | Sep | Oct | Nov | Dec | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Year | ||
Record high | °C | 27 | 22 | 21 | 16 | 13 | 17 | 18 | 25 | 27 | 31 | 32 | 34 | 34 | |
Average high | °C | 19 | 15 | 12 | 9 | 8 | 8 | 10 | 13 | 16 | 18 | 20 | 21 | 14 | |
Average temperature | °C | 16 | 13 | 10 | 7 | 6 | 6 | 8 | 10 | 13 | 15 | 17 | 18 | 11 | |
Average low | °C | 13 | 11 | 8 | 5 | 4 | 4 | 5 | 7 | 9 | 12 | 14 | 14 | 9 | |
Record low | °C | 7 | 2 | -1 | -3 | -8 | -8 | -3 | -1 | 1 | 6 | 10 | 8 | -8 | |
Rain | Days | 9 | 14 | 15 | 15 | 15 | 12 | 12 | 10 | 9 | 8 | 7 | 7 | 132 | |
Snow | Days | 0 | 0 | 0 | 1 | 2 | 3 | 1 | 1 | 0 | 0 | 0 | 0 | 8 | |
Fog | Days | 10 | 8 | 8 | 11 | 11 | 12 | 13 | 10 | 12 | 14 | 15 | 14 | 138 | |
Thunderstorms | Days | 2 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 1 | 1 | 2 | 1 | 11 | |
Average precipitation | Mm. | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 120 | |
Relative humidity | % | 80 | 85 | 85 | 85 | 90 | 85 | 85 | 85 | 80 | 85 | 85 | 85 | 85 | |
Relative humidity morning | % | 89 | 88 | 87 | 89 | 88 | 89 | 90 | 88 | 89 | 90 | 90 | 91 | 89 | |
Relative humidity evening | % | 74 | 78 | 81 | 84 | 84 | 81 | 79 | 73 | 72 | 72 | 73 | 71 | 77 | |
Wind speed | Km/h | 20 | 23 | 24 | 24 | 25 | 23 | 22 | 21 | 19 | 18 | 19 | 18 | 21 | |
Monthly sunshine | Hours | 177 | 112 | 78 | 70 | 66 | 86 | 127 | 171 | 194 | 216 | 194 | 194 | 1684 | |
Day Length | Hours | 13 | 11 | 10 | 9 | 9 | 11 | 13 | 14 | 16 | 17 | 16 | 15 | 13 | |
Dew point | °C | 12 | 9 | 6 | 5 | 3 | 3 | 5 | 5 | 8 | 11 | 13 | 13 | 93 | |
Growing degree-day | °C | 158 | 78 | 0 | 0 | 0 | 0 | 0 | 0 | 52 | 133 | 198 | 215 | 834 | |
Solar radiation, global | Mj/m2 | 13 | 7 | 4 | 3 | 3 | 6 | 10 | 16 | 20 | 22 | 21 | 18 | 12 |
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