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 | 25 | 18 | 16 | 15 | 17 | 21 | 27 | 30 | 33 | 35 | 35 | 35 |
| Average high, °C | 20 | 15 | 8 | 4 | 3 | 6 | 10 | 14 | 18 | 22 | 22 | 22 | 14 |
| Average temperature, °C | 14 | 10 | 5 | 3 | 2 | 3 | 5 | 9 | 13 | 16 | 17 | 17 | 10 |
| Average low, °C | 8 | 5 | 2 | -1 | -2 | -1 | 0 | 3 | 6 | 10 | 11 | 11 | 4 |
| Record low, °C | 2 | -2 | -7 | -13 | -17 | -13 | -7 | -3 | -1 | 3 | 5 | 7 | -17 |
| Rain, days | 18 | 19 | 19 | 18 | 19 | 12 | 19 | 18 | 20 | 19 | 16 | 17 | 214 |
| Snow, days | 0 | 0 | 1 | 1 | 3 | 3 | 2 | 1 | 0 | 0 | 0 | 0 | 11 |
| Fog, days | 13 | 14 | 13 | 15 | 13 | 15 | 14 | 13 | 12 | 12 | 11 | 14 | 159 |
| Thunderstorms, days | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 5 | 5 | 5 | 4 | 29 |
| Average precipitation, mm. | 65 | 72 | 71 | 71 | 64 | 53 | 58 | 54 | 61 | 67 | 78 | 73 | 787 |
| Relative humidity, % | 80 | 85 | 90 | 90 | 85 | 85 | 80 | 75 | 75 | 75 | 75 | 75 | 81 |
| Relative humidity morning, % | 91 | 92 | 90 | 88 | 88 | 88 | 88 | 87 | 86 | 87 | 88 | 89 | 89 |
| Relative humidity evening, % | 65 | 72 | 80 | 83 | 81 | 73 | 68 | 59 | 59 | 62 | 61 | 58 | 68 |
| Wind speed, km/h | 19 | 14 | 22 | 22 | 25 | 16 | 22 | 14 | 12 | 16 | 16 | 16 | 18 |
| Day Length, часов | 13 | 11 | 10 | 9 | 9 | 11 | 13 | 15 | 16 | 17 | 17 | 15 | 13 |
| Dew point, °C | 11 | 7 | 3 | 2 | 1 | 0 | 2 | 3 | 7 | 11 | 12 | 12 | 71 |
| Growing degree-day, °C | 117 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 86 | 167 | 207 | 207 | 783 |
| Solar radiation, global, Mj/m2 | 10 | 6 | 3 | 2 | 3 | 5 | 9 | 13 | 18 | 18 | 18 | 16 | 10 |