Peoria Intl climate by month
Averages and records for each calendar month at Peoria Intl, United States, from 1943 to 2026. The warmest month is July, averaging 29.8°C; the coolest is January at 0.0°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 0.0°C | −8.9°C | 21.1°C31 January 1989 | −31.7°C17 January 1977 | 83 / 83 |
| February | 2.7°C | −6.8°C | 25.6°C27 February 2024 | −28.3°C3 February 1996 | 83 / 83 |
| March | 9.6°C | −0.9°C | 30.6°C26 March 2026 | −23.3°C6 March 1960 | 83 / 83 |
| April | 16.9°C | 5.1°C | 33.3°C25 April 1986 | −10.0°C6 April 1982 | 83 / 83 |
| May | 22.8°C | 10.9°C | 36.1°C27 May 2018 | −3.9°C10 May 1966 | 84 / 84 |
| June | 28.0°C | 16.3°C | 40.6°C25 June 1988 | 3.9°C4 June 1945 | 84 / 84 |
| July | 29.8°C | 18.6°C | 40.0°C24 July 2005 | 8.3°C27 July 1962 | 84 / 84 |
| August | 28.8°C | 17.5°C | 39.4°C17 August 1988 | 5.0°C28 August 1986 | 84 / 84 |
| September | 25.2°C | 13.0°C | 37.8°C1 September 1953 | −1.7°C23 September 1995 | 83 / 84 |
| October | 18.5°C | 6.6°C | 33.9°C3 October 2006 | −7.2°C26 October 1962 | 83 / 83 |
| November | 9.8°C | 0.0°C | 27.2°C1 November 1950 | −18.9°C26 November 1977 | 83 / 83 |
| December | 2.6°C | −5.9°C | 21.7°C3 December 1970 | −30.6°C22 December 1989 | 83 / 83 |
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 83 to 84 years each.
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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.