Brussels, IL
Climate overview — based on NOAA 1991-2020 normals from ST CHARLES CO AP, MO US.
Year-round temperatures (°F)
Climate summary
Brussels has an annual average temperature of 56.1°F with about 39.4 inches of precipitation per year. The warmest month is July (average high 89.1°F), and the coldest is January (average low 21.9°F). May is typically the wettest month (4.60 in) and February the driest (1.89 in).
Best time to visit Brussels
Full guide →Climate change signal
All-time records →140 of 366 (38.3%) of Brussels's all-time daily heat records have been set since 2015. If records were spread evenly across the station's history, only about 5% would fall in any given decade.
| 1990s | 31 | |
| 2000s | 110 | |
| 2010s | 144 | |
| 2020s | 81 |
Bars: number of all-time daily heat records still standing that were set in each decade.
Monthly averages
| Month | Avg High | Avg Low | Avg Temp | Precipitation | Snow | Rainy days |
|---|---|---|---|---|---|---|
| January | 39.7°F | 21.9°F | 30.8°F | 2.49 in | — | 7 |
| February | 45.1°F | 25.6°F | 35.4°F | 1.89 in | — | 7 |
| March | 56.4°F | 34.4°F | 45.4°F | 3.08 in | — | 11 |
| April | 68.2°F | 45.1°F | 56.7°F | 4.24 in | — | 11 |
| May | 77.3°F | 55.9°F | 66.6°F | 4.60 in | — | 13 |
| June | 85.9°F | 64.9°F | 75.4°F | 4.55 in | — | 11 |
| July | 89.1°F | 68.1°F | 78.6°F | 3.74 in | — | 9 |
| August | 87.8°F | 66.0°F | 76.9°F | 3.68 in | — | 9 |
| September | 81.2°F | 57.1°F | 69.1°F | 2.97 in | — | 10 |
| October | 69.3°F | 45.8°F | 57.5°F | 2.66 in | — | 10 |
| November | 55.4°F | 34.6°F | 45.0°F | 3.15 in | — | 8 |
| December | 44.1°F | 27.0°F | 35.5°F | 2.35 in | — | 8 |
Climate twins of Brussels
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).