Humid subtropical climate
Climate Belleville - Illinois
Annual high69ºF
Annual low46ºF
Precipitation41.65 inch
| Month | HighºF | LowºF | Precipinch | Snowinch |
|---|---|---|---|---|
| Jan | 43 | 23 | 2.29 | 3 |
| Feb | 48 | 26 | 2.24 | 3 |
| Mar | 59 | 35 | 3.20 | 1 |
| Apr | 70 | 46 | 3.86 | 0 |
| May | 78 | 56 | 4.90 | 0 |
| Jun | 87 | 64 | 4.26 | 0 |
| Jul | 91 | 68 | 4.05 | 0 |
| Aug | 90 | 65 | 3.30 | 0 |
| Sep | 83 | 56 | 3.28 | 0 |
| Oct | 72 | 46 | 3.44 | 0 |
| Nov | 58 | 37 | 3.92 | 0 |
| Dec | 45 | 26 | 2.91 | 3 |
- JanHigh 43ºFLow 23ºFPrecip 2.29 inch
- FebHigh 48ºFLow 26ºFPrecip 2.24 inch
- MarHigh 59ºFLow 35ºFPrecip 3.20 inch
- AprHigh 70ºFLow 46ºFPrecip 3.86 inch
- MayHigh 78ºFLow 56ºFPrecip 4.90 inch
- JunHigh 87ºFLow 64ºFPrecip 4.26 inch
- JulHigh 91ºFLow 68ºFPrecip 4.05 inch
- AugHigh 90ºFLow 65ºFPrecip 3.30 inch
- SepHigh 83ºFLow 56ºFPrecip 3.28 inch
- OctHigh 72ºFLow 46ºFPrecip 3.44 inch
- NovHigh 58ºFLow 37ºFPrecip 3.92 inch
- DecHigh 45ºFLow 26ºFPrecip 2.91 inch
Climate summary
What is the average weather in Belleville, Illinois?
Belleville experiences a humid subtropical climate, characterized by very strong seasonal temperature contrasts. Summers are hot, while winters are cold and bring regular snowfall. The area is fairly wet overall, with precipitation being wetter in spring, and heavy seasonal downpours or afternoon thunderstorms can sometimes occur during the warmer months.
Belleville weather averages
Annual high69ºF
Annual low46ºF
Precipitation41.65 inch
Snowfall10 inch
Daily normals Belleville - Illinois - January
| Day | HighºF | LowºF | Prec/ | Prec/ | Snow/ | Snow/ |
|---|---|---|---|---|---|---|
| Jan 1 | 42.8 | 25.2 | 0.10 | 0.10 | 0.10 | 0.10 |
| Jan 2 | 42.7 | 25.1 | 0.20 | 0.20 | 0.20 | 0.20 |
| Jan 3 | 42.6 | 25.0 | 0.29 | 0.29 | 0.30 | 0.30 |
| Jan 4 | 42.5 | 24.8 | 0.39 | 0.39 | 0.40 | 0.40 |
| Jan 5 | 42.4 | 24.7 | 0.48 | 0.48 | 0.60 | 0.60 |
| Jan 6 | 42.4 | 24.6 | 0.58 | 0.58 | 0.70 | 0.70 |
| Jan 7 | 42.3 | 24.5 | 0.67 | 0.67 | 0.80 | 0.80 |
| Jan 8 | 42.3 | 24.4 | 0.76 | 0.76 | 0.90 | 0.90 |
| Jan 9 | 42.3 | 24.3 | 0.85 | 0.85 | 1.00 | 1.00 |
| Jan 10 | 42.2 | 24.2 | 0.94 | 0.94 | 1.10 | 1.10 |
| Jan 11 | 42.3 | 24.1 | 1.02 | 1.02 | 1.20 | 1.20 |
| Jan 12 | 42.3 | 24.1 | 1.10 | 1.10 | 1.30 | 1.30 |
| Jan 13 | 42.3 | 24.0 | 1.19 | 1.19 | 1.50 | 1.50 |
| Jan 14 | 42.3 | 24.0 | 1.27 | 1.27 | 1.60 | 1.60 |
| Jan 15 | 42.4 | 23.9 | 1.35 | 1.35 | 1.70 | 1.70 |
| Jan 16 | 42.4 | 23.9 | 1.43 | 1.43 | 1.80 | 1.80 |
| Jan 17 | 42.5 | 23.9 | 1.52 | 1.52 | 1.90 | 1.90 |
| Jan 18 | 42.6 | 23.9 | 1.60 | 1.60 | 2.10 | 2.10 |
| Jan 19 | 42.7 | 23.9 | 1.68 | 1.68 | 2.20 | 2.20 |
| Jan 20 | 42.8 | 23.9 | 1.76 | 1.76 | 2.30 | 2.30 |
| Jan 21 | 42.9 | 23.9 | 1.83 | 1.83 | 2.40 | 2.40 |
| Jan 22 | 43.1 | 24.0 | 1.91 | 1.91 | 2.50 | 2.50 |
| Jan 23 | 43.2 | 24.0 | 1.99 | 1.99 | 2.60 | 2.60 |
| Jan 24 | 43.3 | 24.1 | 2.07 | 2.07 | 2.70 | 2.70 |
| Jan 25 | 43.5 | 24.1 | 2.14 | 2.14 | 2.80 | 2.80 |
| Jan 26 | 43.7 | 24.2 | 2.21 | 2.21 | 2.90 | 2.90 |
| Jan 27 | 43.9 | 24.3 | 2.29 | 2.29 | 3.00 | 3.00 |
| Jan 28 | 44.0 | 24.4 | 2.35 | 2.35 | 3.10 | 3.10 |
| Jan 29 | 44.2 | 24.5 | 2.42 | 2.42 | 3.20 | 3.20 |
| Jan 30 | 44.4 | 24.6 | 2.49 | 2.49 | 3.30 | 3.30 |
| Jan 31 | 44.7 | 24.8 | 2.56 | 2.56 | 3.40 | 3.40 |
Precipitation and snow add up through the month (/mo) and the year (/yr)
Weather history Belleville - October 2026
| Day | HighºF | LowºF | Precip.inch |
|---|---|---|---|
| Oct 1 | 92.3 | 71.4 | – |
| Oct 2 | 83.1 | 64.6 | 0.18 |
| Oct 3 | 77.2 | 50.7 | – |
| Oct 4 | 82.4 | 49.3 | – |
| Oct 5 | 77.7 | 53.4 | – |
| Oct 6 | 79.9 | 45.7 | – |
| Oct 7 | 89.1 | 48.9 | – |
| Oct 8 | 85.6 | 51.4 | – |
| Oct 9 | 89.2 | 50.0 | – |
| Oct 10 | 81.9 | 51.6 | – |
| Oct 11 | 86.4 | 50.0 | – |
| Oct 12 | 93.6 | 59.4 | – |
| Oct 13 | 94.5 | 62.2 | – |
| Oct 14 | 81.9 | 70.9 | 0.38 |
| Oct 15 | 82.2 | 66.2 | 0.36 |
| Oct 16 | 74.7 | 53.1 | 0.04 |
| Oct 17 | 60.1 | 42.8 | – |
| Oct 18 | 66.6 | 37.4 | – |
| Oct 19 | 71.8 | 38.8 | – |
| Oct 20 | 74.1 | 47.8 | – |
| Oct 21 | 75.9 | 44.4 | – |
| Oct 22 | 78.6 | 47.3 | – |
| Oct 23 | 76.8 | 47.1 | – |
| Oct 24 | 75.6 | 45.5 | – |
| Oct 25 | 79.0 | 46.2 | – |
| Oct 26 | 77.4 | 49.6 | – |
| Oct 27 | 73.8 | 46.8 | – |
| Oct 28 | – | – | – |
| Oct 29 | – | – | – |
| Oct 30 | – | – | – |
| Oct 31 | – | – | – |
The data for October 2026 is incomplete: some days or values are missing.
- –No data
- –Not yet observed or received
- TTrace, too small to measure
Observed extremes
- Highest max temperature94.5ºF · Oct 13
- Lowest max temperature60.1ºF · Oct 17
- Highest min temperature71.4ºF · Oct 1
- Lowest min temperature37.4ºF · Oct 18
Geo Belleville - Illinois
Location
- Country
- United States
- State
- Illinois
- County
- St. Clair
- City
- Belleville
- Zip Code
- 62220
- Elevation
- 522 ft
- Longitude
- -89.98
- Latitude
- 38.52
- ICAO
- –
- IATA
- –