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Best time to visit · Belgium
For the most comfortable weather in Brussels, aim for May & June and September. September tops our comfort score at 87/100, with highs around 68°F (20°C) and 2.2 in (55 mm) of rain. April, July & August and October are good shoulder-season months. The toughest months are December – February, mainly because of cool days.
Highs run from 42°F to 75°F across the year, and the yearly total is about 30.0 in (763 mm) of rain.
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high | 42°F5°C | 44°F7°C | 51°F10°C | 59°F15°C | 65°F19°C | 71°F22°C | 75°F24°C | 74°F23°C | 68°F20°C | 60°F15°C | 50°F10°C | 43°F6°C |
| Avg low | 32°F0°C | 32°F0°C | 35°F2°C | 40°F5°C | 47°F8°C | 53°F12°C | 57°F14°C | 56°F13°C | 51°F10°C | 45°F7°C | 39°F4°C | 34°F1°C |
| Rain | 2.7 in69 mm | 2.4 in60 mm | 2.2 in55 mm | 1.5 in38 mm | 2.3 in59 mm | 2.5 in63 mm | 3.0 in75 mm | 3.1 in79 mm | 2.2 in55 mm | 2.5 in63 mm | 2.7 in69 mm | 3.1 in78 mm |
| Humidity | 93% | 89% | 84% | 79% | 77% | 76% | 75% | 77% | 79% | 85% | 91% | 94% |
| Cloud | 77% | 74% | 69% | 64% | 69% | 69% | 67% | 66% | 63% | 70% | 77% | 77% |
| Comfort | 43 | 49 | 62 | 80 | 85 | 84 | 80 | 78 | 87 | 76 | 56 | 44 |
Source: NASA POWER (public domain), 2001–2025 monthly averages on a ~50 km satellite and reanalysis grid, so coasts and valleys can differ from what's shown. The grid cell sits at about 37 m (121 ft), close to Brussels's own ~25 m. Precipitation includes snow as melted water; daylight is calculated from latitude. Check a forecast before you go.
The coldest season, with highs of 42–44°F (5–7°C) and lows down to 32°F (0°C). About 8.1 in (207 mm) of rain falls across these months, 27% of the year's total. Nights dip below freezing in February. It holds the toughest stretch on our comfort score (December – February), averaging 45/100.
Temperatures climb through the season, from 51°F highs in March to 65°F by May. It's the driest season, with only about 6.0 in (152 mm) of rain, 20% of the year's total. Lows bottom out around 35°F (2°C). Comfort peaks here: May ranks with the year's best, and the season averages 76/100.
The warmest stretch of the year, with highs of 71–75°F (22–24°C). It's the wettest season, with about 8.5 in (217 mm) of rain, 28% of the year's total. Lows bottom out around 53°F (12°C). June is among the best-scoring months (season average 81/100).
Temperatures slide from 68°F highs in September to 50°F by November. About 7.4 in (187 mm) of rain falls across these months, 25% of the year's total. Lows bottom out around 39°F (4°C). Comfort peaks here: September ranks with the year's best, and the season averages 73/100.
By comfort score: 7 Great, 1 Good, 2 Fair and 2 Tough. Great months: April – October. Tap a month for its own guide.
For the most comfortable weather in Brussels, aim for May & June and September. September tops our comfort score at 87/100, with highs around 68°F (20°C) and 2.2 in (55 mm) of rain. April, July & August and October are good shoulder-season months. The toughest months are December – February, mainly because of cool days.
August is the wettest month, averaging about 3.1 in (79 mm) of rain. April is the driest, with about 1.5 in (38 mm). The yearly total is around 30.0 in (763 mm).
February is the coldest, with average lows of 32°F (0°C) and highs of 44°F (7°C). The warmest is July, with average highs of 75°F (24°C).
Not very: summer (June – August) humidity averages 76%, and highs peak around 75°F (24°C), so it rarely feels sticky.
On average, yes: lows fall below 32°F (0°C) in February, bottoming out around 32°F (0°C) in February.
Poll the group on May & June and September dates, then plan the days, packing and costs together.
