Belleville, United States weather by month
Measured at Belleville/Scott AFB
Averages and records for each calendar month at Belleville/Scott AFB, United States, from 1948 to 2026. The warmest month is July, averaging 31.8°C; the coolest is January at 4.8°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 4.8°C | −5.2°C | 23.9°C24 January 1950 | −32.8°C17 January 1977 | 78 / 78 |
| February | 7.8°C | −3.2°C | 28.3°C15 February 2018 | −29.4°C10 February 1982 | 76 / 78 |
| March | 13.8°C | 1.8°C | 33.2°C22 March 2026 | −22.2°C5 March 1978 | 78 / 78 |
| April | 20.3°C | 7.4°C | 32.8°C14 April 2006 | −7.8°C8 April 2007 | 75 / 78 |
| May | 25.3°C | 12.7°C | 36.1°C26 May 1953 | −2.2°C4 May 1976 | 77 / 78 |
| June | 30.0°C | 17.6°C | 41.1°C28 June 2012 | 3.3°C1 June 1972 | 78 / 79 |
| July | 31.8°C | 19.6°C | 43.3°C14 July 1954 | 6.1°C6 July 1972 | 78 / 79 |
| August | 30.9°C | 18.2°C | 40.6°C15 August 2007 | 3.9°C29 August 1986 | 79 / 79 |
| September | 27.7°C | 13.8°C | 39.4°C5 September 1954 | −3.3°C23 September 1995 | 77 / 78 |
| October | 21.7°C | 7.7°C | 35.6°C1 October 2019 | −7.2°C17 October 2024 | 78 / 78 |
| November | 13.5°C | 2.1°C | 28.9°C1 November 1950 | −16.7°C8 November 1991 | 77 / 78 |
| December | 6.9°C | −2.7°C | 25.3°C28 December 2025 | −28.3°C22 December 1989 | 75 / 78 |
Years shows the number behind the average high, then the number holding a record for that month. They differ because a year contributes an average only when the month has at least 25 days of readings, while a single reading is enough to set a record. The average low is withheld on the same 25-day rule and is counted separately again; it is shown as a dash where the archive cannot support it. Across the twelve months here the averages rest on 75 to 79 years each.
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Climate at nearby stations
The closest stations with twelve months of archive of their own, nearest first.
Every figure on this page is computed from NOAA GHCN-Daily observations stored per station, per year, per month. Nothing is modelled, interpolated or estimated, and a month the archive never covered is left out rather than filled in. A station appears here only once all twelve months carry an average from at least 10 years. See how this is built.