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Brussels Weather Forecast
| THIS AFTERNOON | TONIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | TUESDAY | TUESDAY NIGHT | WEDNESDAY |
| Sunny | Mostly Clear | Sunny | Chance of T-Storm | Sunny | Mostly Clear | Mostly Clear | Mostly Clear | Mostly Clear | Mostly Clear | Mostly Clear | Chance of T-Storm |
| Hi: 99°FHi: 37°C | Lo: 75°FLo: 24°C | Hi: 99°FHi: 37°C | Lo: 75°FLo: 24°C | Hi: 95°FHi: 35°C | Hi: 91°FHi: 33°C Lo: 71°FLo: 22°C | Hi: 91°FHi: 33°C Lo: 71°FLo: 22°C | Hi: 91°FHi: 33°C Lo: 69°FLo: 21°C | Hi: 91°FHi: 33°C Lo: 69°FLo: 21°C | Hi: 91°FHi: 33°C Lo: 69°FLo: 21°C | Lo: 71°FLo: 22°C | Hi: 95°FHi: 35°C |
| POP: 20% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1103 AM CDT Thu Sep 03 2026 

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Issued: 449 AM CDT Thu Sep 3 2026
Key Messages
- An Extreme Heat Warning is now effect until Saturday evening as the dangerous late season heatwave continues.
- Temperatures are forecast to "cool" slightly Sunday into Labor Day before another period of near-record breaking heat returns by the middle of next week.
Aviation
/06Z TAFS THROUGH 12Z FRIDAY/... Issued at 446 AM CDT Thu Sep 3 2026
Mainly dry and VFR conditions are expected through the period. Light winds will turn out of the southwest less than 10 knots this morning.
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