London
United Kingdom
| Season | Autumn | Winter | Spring | Summer | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Sep | Oct | Nov | Dec | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Year |
| Record high, °C | 27 | 25 | 15 | 16 | 13 | 16 | 20 | 23 | 29 | 30 | 31 | 31 | 31 |
| Average high, °C | 18 | 14 | 10 | 7 | 7 | 7 | 10 | 13 | 17 | 20 | 22 | 21 | 14 |
| Average temperature, °C | 14 | 10 | 7 | 4 | 4 | 4 | 7 | 9 | 12 | 15 | 17 | 17 | 10 |
| Average low, °C | 10 | 7 | 4 | 2 | 1 | 1 | 3 | 4 | 7 | 10 | 12 | 12 | 6 |
| Record low, °C | 1 | -3 | -5 | -11 | -15 | -8 | -6 | -2 | 0 | 2 | 5 | 4 | -15 |
| Rain, days | 10 | 12 | 12 | 12 | 13 | 10 | 11 | 11 | 10 | 10 | 9 | 10 | 128 |
| Snow, days | 0 | 0 | 1 | 4 | 4 | 5 | 3 | 2 | 0 | 0 | 0 | 0 | 19 |
| Fog, days | 3 | 4 | 5 | 7 | 5 | 3 | 2 | 2 | 2 | 1 | 1 | 2 | 37 |
| Thunderstorms, days | 1 | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 2 | 3 | 2 | 2 | 13 |
| Snowfall, cm. | 0 | 0 | 0 | 0 | 3 | 1 | 10 | 0 | 0 | 0 | 0 | 0 | 14 |
| Average precipitation, mm. | 57 | 54 | 63 | 66 | 60 | 47 | 50 | 46 | 54 | 56 | 51 | 67 | 671 |
| Relative humidity, % | 80 | 85 | 88 | 89 | 87 | 85 | 80 | 76 | 72 | 72 | 75 | 78 | 81 |
| Relative humidity morning, % | 91 | 91 | 90 | 88 | 88 | 88 | 88 | 89 | 88 | 87 | 88 | 91 | 89 |
| Relative humidity evening, % | 62 | 71 | 78 | 82 | 79 | 75 | 67 | 61 | 59 | 60 | 57 | 58 | 67 |
| Wind speed, km/h | 12 | 13 | 14 | 14 | 16 | 15 | 15 | 14 | 12 | 12 | 12 | 11 | 13 |
| Day Length, часов | 13 | 11 | 9 | 8 | 9 | 11 | 13 | 15 | 17 | 18 | 17 | 15 | 13 |
| Dew point, °C | 10 | 8 | 5 | 2 | 1 | 1 | 2 | 4 | 6 | 9 | 11 | 11 | 70 |
| Growing degree-day, °C | 12 | 0 | 0 | 0 | 0 | 0 | 0 | 54 | 143 | 204 | 202 | 121 | 735 |
| Solar radiation, global, Mj/m2 | 10 | 6 | 3 | 2 | 3 | 5 | 8 | 13 | 16 | 17 | 17 | 15 | 10 |