Brussels Climate & Weather Averages
Belgium · Oceanic climate · Data averaged from 2020-01-01 to 2024-12-31 (5 years)
Best Time to Visit Brussels
Based on temperature comfort, low rainfall, and sunshine hours, the best months to visit Brussels are:
August, July, June
Scores based on ideal temperature (18-28°C), low precipitation, and high sunshine. August scores 56/100.
Brussels has a Oceanic climate with mild summers and cold winters. The warmest month is August with an average temperature of 19.2°C (66.6°F), while January is the coldest at 4.1°C (39.4°F). Annual precipitation averages 878.0mm spread across approximately 217.0 rainy days per year, with July being the wettest month at 93.8mm and April the driest at 51.5mm. The city receives an average of 2.7-11.6 hours of sunshine per day, with the sunniest months being June and July. Humidity remains relatively consistent throughout the year, averaging around 78.4% annually, while average wind speeds reach 21.3 km/h. The overall annual mean temperature is 11.5°C (52.7°F), reflecting the oceanic conditions shaped by Brussels's latitude (50.85°) and surrounding geography. For travelers, the best time to visit is August, July, June, when temperatures are comfortable and rainfall is lower.
Brussels has an oceanic climate similar to London but with slightly warmer summers. I've studied the data and found that the city receives moderate rainfall year-round, with no distinct dry season. The best time for visiting is May to September, when temperatures are most pleasant and the city's outdoor cafés and markets are at their best.
Seasonal Climate Overview
Spring (Mar-May)
Average temperature 10.1°C (50.2°F), rainfall 61.9mm, sunshine 9.2 hrs/day, humidity 73.1%. Mild transitional weather characterizes this period. Expect around 17.0 rainy days per month.
Summer (Jun-Aug)
Average temperature 18.3°C (64.9°F), rainfall 76.8mm, sunshine 11.3 hrs/day, humidity 72.1%. Mild transitional weather characterizes this period. Expect around 18.5 rainy days per month.
Autumn (Sep-Nov)
Average temperature 12.3°C (54.1°F), rainfall 78.3mm, sunshine 6.6 hrs/day, humidity 82.4%. Mild transitional weather characterizes this period. Expect around 18.0 rainy days per month.
Winter (Dec-Feb)
Average temperature 5.2°C (41.4°F), rainfall 75.7mm, sunshine 3.7 hrs/day, humidity 85.8%. Cold season conditions dominate. Expect around 18.7 rainy days per month.
Monthly Temperature Averages (°C / °F)
| Month | Avg High | Avg Low | Mean Temp |
|---|---|---|---|
| January | 6.5°C (43.7°F) | 1.9°C (35.4°F) | 4.1°C (39.4°F) |
| February | 9.4°C (48.9°F) | 3.5°C (38.3°F) | 6.3°C (43.3°F) |
| March | 11.3°C (52.3°F) | 3.6°C (38.5°F) | 7.3°C (45.1°F) |
| April | 13.8°C (56.8°F) | 5.0°C (41.0°F) | 9.4°C (48.9°F) |
| May | 18.1°C (64.6°F) | 8.8°C (47.8°F) | 13.5°C (56.3°F) |
| June | 22.1°C (71.8°F) | 12.9°C (55.2°F) | 17.6°C (63.7°F) |
| July | 22.3°C (72.1°F) | 13.8°C (56.8°F) | 18.1°C (64.6°F) |
| August | 23.6°C (74.5°F) | 15.1°C (59.2°F) | 19.2°C (66.6°F) |
| September | 20.8°C (69.4°F) | 12.4°C (54.3°F) | 16.4°C (61.5°F) |
| October | 16.0°C (60.8°F) | 9.6°C (49.3°F) | 12.6°C (54.7°F) |
| November | 10.5°C (50.9°F) | 5.4°C (41.7°F) | 7.8°C (46.0°F) |
| December | 7.4°C (45.3°F) | 3.2°C (37.8°F) | 5.3°C (41.5°F) |
Monthly Precipitation (mm)
| Month | Avg Rainfall | Bar |
|---|---|---|
| January | 69.2 mm | |
| February | 79.2 mm | |
| March | 70.6 mm | |
| April | 51.5 mm | |
| May | 63.6 mm | |
| June | 79.2 mm | |
| July | 93.8 mm | |
| August | 57.5 mm | |
| September | 75.2 mm | |
| October | 92.5 mm | |
| November | 67.2 mm | |
| December | 78.8 mm |
Monthly Rainy Days (avg days with rain > 0.1mm)
| Month | Avg Rainy Days | Bar |
|---|---|---|
| January | 17.6 | |
| February | 19.0 | |
| March | 18.2 | |
| April | 15.6 | |
| May | 17.2 | |
| June | 16.2 | |
| July | 20.8 | |
| August | 18.4 | |
| September | 16.0 | |
| October | 19.6 | |
| November | 18.4 | |
| December | 19.6 |
Monthly Humidity (%)
| Month | Avg Humidity | Bar |
|---|---|---|
| January | 87.1% | |
| February | 81.5% | |
| March | 76.3% | |
| April | 70.8% | |
| May | 72.1% | |
| June | 70.7% | |
| July | 73.1% | |
| August | 72.6% | |
| September | 77.2% | |
| October | 82.7% | |
| November | 87.2% | |
| December | 88.9% |
Monthly Wind Speed (avg max km/h)
| Month | Avg Max Wind | Bar |
|---|---|---|
| January | 23.7 km/h | |
| February | 27.2 km/h | |
| March | 22.1 km/h | |
| April | 20.7 km/h | |
| May | 19.9 km/h | |
| June | 18.1 km/h | |
| July | 19.3 km/h | |
| August | 18.7 km/h | |
| September | 18.4 km/h | |
| October | 22.6 km/h | |
| November | 21.7 km/h | |
| December | 22.7 km/h |
Monthly UV Index (avg max)
| Month | UV Index | Risk Level | Bar |
|---|---|---|---|
| January | — | — | |
| February | — | — | |
| March | — | — | |
| April | — | — | |
| May | — | — | |
| June | — | — | |
| July | — | — | |
| August | — | — | |
| September | — | — | |
| October | — | — | |
| November | — | — | |
| December | — | — |
Monthly Snowfall (cm)
| Month | Avg Snowfall | Bar |
|---|---|---|
| January | 4.3 cm | |
| February | 2.1 cm | |
| March | 1.7 cm | |
| April | 1.9 cm | |
| May | 0.0 cm | |
| June | 0.0 cm | |
| July | 0.0 cm | |
| August | 0.0 cm | |
| September | 0.0 cm | |
| October | 0.0 cm | |
| November | 1.6 cm | |
| December | 2.1 cm |
Monthly Sunshine Hours (daily average)
| Month | Avg Daily Sunshine | Bar |
|---|---|---|
| January | 3.6 hrs | |
| February | 4.9 hrs | |
| March | 7.1 hrs | |
| April | 9.5 hrs | |
| May | 10.9 hrs | |
| June | 11.6 hrs | |
| July | 11.3 hrs | |
| August | 10.9 hrs | |
| September | 9.2 hrs | |
| October | 6.2 hrs | |
| November | 4.3 hrs | |
| December | 2.7 hrs |
Frequently Asked Questions
What is the hottest month in Brussels?
August is the hottest month with an average temperature of 19.2°C (66.6°F).
What is the coldest month in Brussels?
January is the coldest month with an average temperature of 4.1°C (39.4°F).
What is the rainiest month in Brussels?
July is the wettest month with an average of 93.8mm of precipitation. The city experiences about 217.0 rainy days per year.
When is the best time to visit Brussels?
The best time to visit Brussels is during August, July, June, when temperatures are comfortable and rainfall is lower.
Cities with Similar Climate (Oceanic)
Data Source: Open-Meteo historical archive (2020-01-01 to 2024-12-31). Daily measurements aggregated into monthly climate normals. Coordinates: 50.85°, 4.35°. Timezone: Europe/Brussels. Last updated: 2026-07-30.