Climate in Brussels — Annual Weather Overview
Brussels has a oceanic climate — mild temperatures year-round with regular rainfall. The hottest month is August (average high 23.5°C) and the coolest is January (6.7°C). The seasons are strongly defined — a 16.8°C swing between August highs and January lows. Annual rainfall totals around 841mm. October is the wettest month at 97.8mm, while April averages just 40.5mm. Average daily sunshine is 7.9 hours.
**Spring (March, April, May):** average highs 14.2°C, 158mm rain. **Summer (June, July, August):** average highs 22.8°C, 226mm rain. **Autumn (September, October, November):** average highs 15.9°C, 233mm rain. **Winter (December, January, February):** average highs 7.7°C, 224mm rain.
Brussels — Monthly Temperatures
Brussels — Monthly Rainfall
✅ Best months to visit
All year
ℹ️ No months to avoid
Weather in Brussels stays reasonable all year.
Brussels weather by month
| Month | High | Low | Rain | Sun/day | Rainy days | Rating |
|---|---|---|---|---|---|---|
| January | 6.7°C | 2.1°C | 70.7mm | 3.4h | 12 | 10/10 |
| February | 9.0°C | 2.9°C | 71.1mm | 5.2h | 12 | 10/10 |
| March | 11.0°C | 3.1°C | 64.4mm | 7.4h | 12 | 10/10 |
| April | 13.7°C | 4.5°C | 40.5mm | 9.6h | 8 | 10/10 |
| May | 17.9°C | 8.3°C | 52.6mm | 11.5h | 10 | 10/10 |
| June | 22.7°C | 13.3°C | 74.5mm | 11.8h | 10 | 10/10 |
| July | 22.3°C | 13.7°C | 93.4mm | 11.4h | 11 | 10/10 |
| August | 23.5°C | 15.0°C | 58.4mm | 11.0h | 13 | 10/10 |
| September | 21.1°C | 12.5°C | 68.9mm | 9.4h | 10 | 10/10 |
| October | 16.0°C | 9.7°C | 97.8mm | 6.2h | 15 | 10/10 |
| November | 10.6°C | 5.5°C | 66.5mm | 4.6h | 13 | 10/10 |
| December | 7.3°C | 3.2°C | 82.1mm | 2.7h | 15 | 10/10 |
For the full verdict on when to go, see the best time to visit Brussels. Seasonal breakdowns: spring, summer, autumn and winter.
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Frequently Asked Questions
What type of climate does Brussels have?
Brussels has a oceanic climate — mild temperatures year-round with regular rainfall. Average highs range from 6.7°C in January to 23.5°C in August.
What is the hottest month in Brussels?
August is the hottest month in Brussels, with average highs of 23.5°C and lows of 15.0°C.
What is the coldest month in Brussels?
January is the coolest month, with average highs of 6.7°C and lows of 2.1°C.
What is the wettest month in Brussels?
October is the wettest month, averaging 97.8mm of rainfall over around 15 rainy days.
How much rain does Brussels get per year?
Brussels receives around 841mm of rain per year. The driest month is April (40.5mm).
When is the best time to visit Brussels?
The best time to visit Brussels is All year. See the full month-by-month guide →
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Trip essentials for Brussels
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Climate data sourced from Open-Meteo (open source, open data licence). Monthly averages calculated from 2020–2023 historical data. Weather can be unpredictable — always check a live forecast before travelling.