Brussels
Belgium
| Season | Autumn | Winter | Spring | Summer | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Sep | Oct | Nov | Dec | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Year |
| Record high, °C | 30 | 26 | 20 | 15 | 13 | 18 | 21 | 23 | 31 | 32 | 35 | 35 | 35 |
| Average high, °C | 18 | 14 | 8 | 6 | 4 | 5 | 9 | 12 | 17 | 20 | 22 | 22 | 13 |
| Average temperature, °C | 14 | 10 | 6 | 3 | 2 | 2 | 6 | 8 | 12 | 15 | 17 | 17 | 9 |
| Average low, °C | 10 | 6 | 3 | 1 | 0 | 0 | 2 | 3 | 7 | 10 | 12 | 12 | 6 |
| Record low, °C | -1 | -4 | -11 | -16 | -22 | -15 | -8 | -5 | -1 | 1 | 2 | 3 | -22 |
| Rain, days | 16 | 18 | 18 | 20 | 19 | 14 | 20 | 18 | 19 | 19 | 17 | 16 | 214 |
| Snow, days | 0 | 0 | 2 | 5 | 7 | 7 | 4 | 2 | 0 | 0 | 0 | 0 | 27 |
| Fog, days | 20 | 20 | 19 | 21 | 20 | 20 | 19 | 18 | 19 | 21 | 21 | 20 | 238 |
| Thunderstorms, days | 2 | 1 | 0 | 0 | 0 | 1 | 1 | 1 | 4 | 5 | 4 | 4 | 23 |
| 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, % | 95 | 94 | 93 | 92 | 92 | 91 | 91 | 91 | 92 | 94 | 94 | 95 | 93 |
| Relative humidity evening, % | 69 | 74 | 81 | 85 | 84 | 76 | 72 | 62 | 62 | 66 | 63 | 62 | 71 |
| Wind speed, km/h | 16 | 14 | 19 | 17 | 20 | 19 | 17 | 16 | 12 | 12 | 12 | 12 | 16 |
| Day Length, часов | 13 | 11 | 10 | 9 | 9 | 11 | 13 | 15 | 16 | 17 | 17 | 15 | 13 |
| Dew point, °C | 11 | 8 | 3 | 2 | 0 | 0 | 2 | 3 | 7 | 11 | 13 | 13 | 73 |
| Growing degree-day, °C | 133 | 17 | 0 | 0 | 0 | 0 | 0 | 0 | 69 | 158 | 224 | 224 | 826 |
| Solar radiation, global, Mj/m2 | 10 | 6 | 3 | 2 | 3 | 5 | 9 | 13 | 18 | 18 | 18 | 16 | 10 |