Belleville, IL
Climate overview — based on NOAA 1991-2020 normals from BELLEVILLE SIU RSCH, IL US.
Year-round temperatures (°F)
Climate summary
Belleville has an annual average temperature of 57.7°F with about 43.4 inches of precipitation per year and 11.2 inches of snow. The warmest month is July (average high 90.2°F), and the coldest is January (average low 24.3°F). May is typically the wettest month (5.05 in) and February the driest (2.16 in). Snow typically falls from November through March.
Best time to visit Belleville
Full guide →Climate change signal
All-time records →45 of 366 (12.3%) of Belleville'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.
| 1940s | 6 | |
| 1950s | 76 | |
| 1960s | 41 | |
| 1970s | 23 | |
| 1980s | 47 | |
| 1990s | 34 | |
| 2000s | 49 | |
| 2010s | 76 | |
| 2020s | 14 |
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 | 42.9°F | 24.3°F | 33.6°F | 2.56 in | 3.4 in | 7 |
| February | 48.6°F | 28.0°F | 38.3°F | 2.16 in | 3.3 in | 8 |
| March | 59.2°F | 36.3°F | 47.8°F | 3.44 in | 1.0 in | 10 |
| April | 70.6°F | 46.0°F | 58.3°F | 4.90 in | — | 10 |
| May | 79.1°F | 56.3°F | 67.7°F | 5.05 in | — | 12 |
| June | 87.3°F | 64.5°F | 75.9°F | 4.62 in | — | 9 |
| July | 90.2°F | 67.8°F | 79.0°F | 4.03 in | — | 7 |
| August | 89.1°F | 65.3°F | 77.2°F | 3.92 in | — | 7 |
| September | 83.3°F | 56.9°F | 70.1°F | 3.35 in | — | 7 |
| October | 72.6°F | 46.7°F | 59.7°F | 3.12 in | — | 8 |
| November | 58.1°F | 36.9°F | 47.5°F | 3.60 in | 0.6 in | 8 |
| December | 46.3°F | 28.3°F | 37.3°F | 2.61 in | 2.9 in | 8 |
Climate twins of Belleville
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).