Winchester Rgnl climate by month
Averages and records for each calendar month at Winchester Rgnl, United States, from 1912 to 2026. The warmest month is July, averaging 30.8°C; the coolest is January at 5.7°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 5.7°C | −4.9°C | 26.7°C26 January 1950 | −27.8°C19 January 1994 | 106 / 111 |
| February | 7.4°C | −4.2°C | 27.2°C22 February 2018 | −26.7°C5 February 1996 | 98 / 109 |
| March | 12.4°C | −0.4°C | 31.7°C29 March 1989 | −21.1°C15 March 1993 | 107 / 111 |
| April | 18.8°C | 4.7°C | 36.7°C25 April 1925 | −11.1°C1 April 1923 | 110 / 114 |
| May | 24.0°C | 10.2°C | 36.7°C7 May 1930 | −2.2°C10 May 1947 | 110 / 112 |
| June | 28.4°C | 15.0°C | 40.0°C29 June 1934 | 2.2°C8 June 1977 | 103 / 110 |
| July | 30.8°C | 17.6°C | 41.7°C17 July 1988 | 5.6°C1 July 1988 | 112 / 113 |
| August | 29.7°C | 16.6°C | 41.7°C4 August 1930 | 2.2°C30 August 1982 | 111 / 113 |
| September | 26.2°C | 12.8°C | 39.4°C2 September 1953 | −1.1°C24 September 1983 | 107 / 112 |
| October | 20.0°C | 6.6°C | 37.2°C1 October 1927 | −8.9°C31 October 1988 | 103 / 108 |
| November | 13.3°C | 1.4°C | 29.4°C1 November 1950 | −15.6°C30 November 1929 | 103 / 109 |
| December | 7.3°C | −3.2°C | 26.7°C6 December 2001 | −21.1°C23 December 1989 | 104 / 111 |
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 98 to 112 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.