Brussels' mild maritime climate is unfortunately characterised by lots of grey, rainy weather. The warmest months are July and August when highs hover around 22°C (72°F), though they can also be the wettest. Winters are more predictable with plenty of rain and heavy-coat 'highs' of 4-7°C (39-45°F).
| Low temp (°C) | High temp (°C) | Sunshine (hours) | Rainfall (mm) | Humidity (am) | Humidity (pm) | |
|---|---|---|---|---|---|---|
| Jan | -1 | 4 | 2 | 66 | 92 | 86 |
| Feb | 0 | 7 | 3 | 61 | 92 | 81 |
| Mar | 2 | 10 | 4 | 53 | 91 | 74 |
| Apr | 5 | 14 | 5 | 60 | 91 | 71 |
| May | 8 | 18 | 6 | 55 | 90 | 65 |
| Jun | 11 | 22 | 7 | 76 | 87 | 65 |
| Jul | 12 | 23 | 6 | 95 | 91 | 68 |
| Aug | 12 | 22 | 6 | 80 | 93 | 69 |
| Sep | 11 | 21 | 5 | 63 | 94 | 69 |
| Oct | 7 | 15 | 4 | 83 | 93 | 77 |
| Nov | 3 | 9 | 2 | 75 | 93 | 85 |
| Dec | 0 | 6 | 1 | 88 | 92 | 86 |