Brussels
Belgium
| Season | Autumn | Winter | Spring | Summer | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Sep | Oct | Nov | Dec | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Year |
| Record high, °C | 35 | 25 | 20 | 17 | 15 | 17 | 22 | 30 | 31 | 32 | 33 | 32 | 35 |
| Average high, °C | 20 | 15 | 9 | 5 | 4 | 5 | 10 | 14 | 18 | 21 | 23 | 23 | 14 |
| Average temperature, °C | 15 | 10 | 6 | 3 | 2 | 2 | 5 | 8 | 12 | 15 | 17 | 17 | 9 |
| Average low, °C | 10 | 6 | 3 | 1 | 0 | -1 | 1 | 3 | 7 | 10 | 12 | 12 | 5 |
| Record low, °C | 2 | -6 | -6 | -17 | -12 | -21 | -10 | -3 | -1 | 2 | 2 | 5 | -21 |
| Rain, days | 9 | 5 | 7 | 10 | 9 | 8 | 5 | 6 | 6 | 8 | 7 | 8 | 88 |
| 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. | 70 | 100 | 70 | 80 | 120 | 50 | 50 | 50 | 50 | 70 | 70 | 140 | 920 |
| Relative humidity, % | 81 | 84 | 88 | 90 | 90 | 88 | 83 | 77 | 76 | 77 | 78 | 78 | 83 |
| 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 | 4 | 1 | 0 | 0 | 2 | 4 | 8 | 11 | 13 | 13 | 74 |
| Growing degree-day, °C | 150 | 17 | 0 | 0 | 0 | 0 | 0 | 0 | 95 | 175 | 241 | 241 | 919 |
| Solar radiation, global, Mj/m2 | 10 | 6 | 3 | 2 | 3 | 5 | 9 | 13 | 17 | 17 | 17 | 15 | 10 |