Brussels
Belgium
| Season | Autumn | Winter | Spring | Summer | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Sep | Oct | Nov | Dec | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Year |
| Record high, °C | 31 | 26 | 18 | 16 | 13 | 18 | 21 | 23 | 28 | 32 | 35 | 35 | 35 |
| Average high, °C | 18 | 13 | 8 | 6 | 4 | 5 | 8 | 12 | 16 | 20 | 21 | 21 | 13 |
| Average temperature, °C | 15 | 11 | 5 | 3 | 1 | 2 | 5 | 10 | 14 | 18 | 19 | 19 | 10 |
| Average low, °C | 10 | 7 | 3 | 1 | 0 | 0 | 2 | 3 | 8 | 11 | 13 | 12 | 6 |
| Record low, °C | 0 | -3 | -7 | -15 | -18 | -14 | -9 | -4 | 0 | 1 | 6 | 6 | -18 |
| Rain, days | 18 | 20 | 20 | 22 | 21 | 15 | 20 | 19 | 20 | 20 | 18 | 17 | 230 |
| Snow, days | 0 | 0 | 3 | 7 | 9 | 7 | 6 | 3 | 0 | 0 | 0 | 0 | 35 |
| Fog, days | 21 | 21 | 20 | 21 | 19 | 17 | 18 | 18 | 17 | 20 | 20 | 21 | 233 |
| Thunderstorms, days | 2 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 4 | 5 | 4 | 3 | 21 |
| Average precipitation, mm. | 61 | 60 | 70 | 70 | 58 | 54 | 58 | 50 | 63 | 71 | 71 | 75 | 761 |
| Relative humidity, % | 85 | 85 | 90 | 90 | 90 | 85 | 80 | 75 | 75 | 75 | 75 | 75 | 82 |
| Relative humidity morning, % | 92 | 92 | 91 | 91 | 91 | 89 | 90 | 88 | 86 | 88 | 88 | 90 | 90 |
| Relative humidity evening, % | 68 | 73 | 81 | 85 | 84 | 75 | 70 | 62 | 59 | 62 | 61 | 60 | 70 |
| Wind speed, km/h | 19 | 17 | 19 | 20 | 20 | 19 | 20 | 17 | 16 | 17 | 16 | 14 | 18 |
| Day Length, часов | 13 | 11 | 10 | 9 | 9 | 11 | 13 | 15 | 16 | 17 | 17 | 15 | 13 |
| Dew point, °C | 11 | 7 | 3 | 2 | 0 | 0 | 2 | 3 | 7 | 10 | 12 | 12 | 69 |
| Growing degree-day, °C | 150 | 17 | 0 | 0 | 0 | 0 | 0 | 0 | 121 | 233 | 276 | 276 | 1072 |
| Solar radiation, global, Mj/m2 | 10 | 6 | 3 | 2 | 3 | 5 | 9 | 13 | 17 | 17 | 17 | 15 | 10 |