Winchester Muni climate by month
Averages and records for each calendar month at Winchester Muni, United States, from 1985 to 2026. The warmest month is July, averaging 31.1°C; the coolest is January at 9.9°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 9.9°C | −0.9°C | 25.0°C30 January 2002 | −23.3°C17 January 2024 | 36 / 40 |
| February | 12.4°C | 1.1°C | 26.7°C23 February 1996 | −15.6°C18 February 2015 | 36 / 40 |
| March | 17.0°C | 4.5°C | 30.0°C26 March 2026 | −13.3°C14 March 1993 | 36 / 40 |
| April | 21.9°C | 8.4°C | 31.7°C30 April 1987 | −5.6°C3 April 1992 | 35 / 40 |
| May | 25.9°C | 13.6°C | 35.0°C27 May 2019 | −0.6°C4 May 2011 | 33 / 40 |
| June | 29.7°C | 18.0°C | 40.0°C30 June 2012 | 6.7°C11 June 1988 | 33 / 39 |
| July | 31.1°C | 19.9°C | 40.6°C1 July 2012 | 11.1°C1 July 2008 | 35 / 39 |
| August | 31.0°C | 19.2°C | 39.4°C16 August 2007 | 8.9°C14 August 2004 | 33 / 39 |
| September | 28.0°C | 15.6°C | 37.2°C6 September 1990 | 2.2°C26 September 2001 | 35 / 38 |
| October | 22.4°C | 9.0°C | 34.4°C1 October 2019 | −5.0°C28 October 2001 | 35 / 37 |
| November | 16.3°C | 3.7°C | 30.0°C1 November 2016 | −10.6°C22 November 2008 | 36 / 39 |
| December | 11.3°C | 0.6°C | 24.4°C4 December 1998 | −20.6°C22 December 1989 | 38 / 40 |
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 33 to 38 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.