Lancaster/Fairfield Cnty climate by month
Averages and records for each calendar month at Lancaster/Fairfield Cnty, United States, from 1996 to 2026. The warmest month is July, averaging 29.1°C; the coolest is January at 3.2°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 3.2°C | −6.5°C | 22.2°C11 January 2020 | −29.4°C27 January 2003 | 30 / 30 |
| February | 5.7°C | −5.1°C | 26.1°C24 February 2017 | −28.8°C17 February 2015 | 30 / 30 |
| March | 11.8°C | −0.4°C | 28.9°C20 March 2012 | −20.5°C6 March 2015 | 30 / 30 |
| April | 18.4°C | 4.6°C | 30.6°C25 April 2009 | −9.4°C10 April 1997 | 29 / 30 |
| May | 23.4°C | 10.3°C | 33.9°C27 May 2012 | −3.3°C4 May 2005 | 29 / 30 |
| June | 27.8°C | 15.1°C | 37.2°C29 June 2012 | 2.2°C2 June 2025 | 30 / 30 |
| July | 29.1°C | 16.9°C | 37.8°C7 July 2012 | 6.1°C4 July 1996 | 31 / 31 |
| August | 28.6°C | 15.5°C | 37.2°C30 August 2024 | 5.0°C21 August 2024 | 31 / 31 |
| September | 25.8°C | 11.4°C | 35.6°C8 September 2002 | −1.1°C22 September 1999 | 30 / 31 |
| October | 19.0°C | 5.4°C | 33.9°C1 October 2019 | −7.2°C23 October 1997 | 30 / 30 |
| November | 11.8°C | 0.0°C | 26.7°C2 November 2016 | −14.9°C13 November 2019 | 30 / 30 |
| December | 6.1°C | −3.2°C | 22.8°C6 December 1998 | −22.7°C31 December 2017 | 29 / 30 |
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 29 to 31 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.