Brussels · August
Run in the morning.
Comfortable average high of 73°F, dipping to 58°F at night. Expect 17 rain days — plan around the radar. Humidity rises with the sun — morning runs catch the driest, coolest window.
Avg high / low
73° / 58°F
Humidity
73%
Rain days
17/mo
Wind
11 mph
What August feels like in Brussels
Sunrise
06:31
Mid-month average
Sunset
21:01
Mid-month average
Time-of-day breakdown
Morning
Coolest, driest air of the day. The window before sunrise is the most reliable comfortable hour.
Midday
Mild but UV and traffic peak. Workable if you don't mind shifting your pace.
Evening
Warm and runnable. Crowded routes but the air's typically calm.
What to wear running in Brussels in August
The kit for August in Brussels: shorts and a short-sleeve are the standard kit, a water-resistant cap or jacket on standby.
August vs the surrounding months
vs July
0° avg high
+1 rain days
Brussels in July →
August
73°F avg high
17 rain days
Best: morning
vs September
+5° avg high
+3 rain days
Brussels in September →
Frequently Asked Questions
What is the best time of day to run in Brussels in August?+
Morning. Humidity rises with the sun — morning runs catch the driest, coolest window.
What's the average temperature in Brussels in August?+
Average high 73°F, average low 58°F.
How does August compare to surrounding months in Brussels?+
Compared to July (avg high 74°F), August is cooler. Compared to September (avg high 68°F), August is warmer.
Does it rain often in Brussels in August?+
Expect about 17 measurable rain days in August, on average.