KARL STEFAN MEMORIAL AIRPORT weather by month
Averages and records for each calendar month at KARL STEFAN MEMORIAL AIRPORT, United States, from 1945 to 2026. The warmest month is July, averaging 30.5°C; the coolest is January at −0.5°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | −0.5°C | −12.1°C | 23.3°C26 January 2002 | −32.8°C12 January 1974 | 81 / 81 |
| February | 2.1°C | −9.6°C | 24.4°C23 February 2002 | −34.9°C16 February 2021 | 81 / 81 |
| March | 8.6°C | −3.7°C | 35.6°C21 March 2026 | −28.9°C4 March 1960 | 81 / 81 |
| April | 16.4°C | 2.9°C | 35.0°C21 April 1980 | −16.7°C3 April 1975 | 81 / 81 |
| May | 22.4°C | 9.3°C | 39.4°C25 May 1967 | −4.4°C3 May 1976 | 81 / 81 |
| June | 28.1°C | 15.1°C | 41.1°C16 June 1946 | 2.8°C2 June 2022 | 81 / 81 |
| July | 30.5°C | 17.8°C | 45.0°C11 July 1954 | 5.6°C30 July 1971 | 81 / 81 |
| August | 29.3°C | 16.6°C | 41.7°C9 August 1947 | 4.4°C20 August 1950 | 81 / 81 |
| September | 24.9°C | 10.9°C | 38.9°C4 September 2012 | −3.3°C29 September 1984 | 80 / 81 |
| October | 18.1°C | 3.9°C | 36.7°C11 October 2015 | −11.7°C31 October 1993 | 81 / 81 |
| November | 8.8°C | −3.6°C | 28.3°C2 November 2005 | −26.1°C30 November 1964 | 81 / 81 |
| December | 1.6°C | −9.5°C | 21.7°C16 December 1962 | −34.4°C22 December 1989 | 81 / 81 |
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 80 to 81 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.