Lancaster Arpt climate by month
Averages and records for each calendar month at Lancaster Arpt, United States, from 1999 to 2026. The warmest month is July, averaging 29.9°C; the coolest is January at 3.6°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 3.6°C | −5.1°C | 20.6°C29 January 2002 | −21.7°C21 January 2026 | 26 / 27 |
| February | 5.2°C | −4.4°C | 27.8°C21 February 2018 | −18.8°C16 February 2015 | 26 / 27 |
| March | 11.2°C | 0.1°C | 28.3°C29 March 2025 | −19.3°C7 March 2015 | 27 / 28 |
| April | 17.3°C | 5.1°C | 32.2°C17 April 2002 | −6.0°C6 April 2016 | 28 / 28 |
| May | 22.8°C | 10.8°C | 35.0°C31 May 2022 | −0.5°C9 May 2020 | 28 / 28 |
| June | 27.7°C | 16.2°C | 36.7°C30 June 2021 | 6.1°C2 June 2003 | 28 / 28 |
| July | 29.9°C | 18.8°C | 39.4°C22 July 2011 | 10.0°C3 July 2001 | 28 / 28 |
| August | 28.8°C | 17.8°C | 37.8°C23 August 2012 | 7.8°C21 August 2000 | 28 / 28 |
| September | 25.2°C | 13.9°C | 36.7°C4 September 2023 | 2.8°C29 September 2000 | 27 / 28 |
| October | 18.6°C | 7.4°C | 35.0°C2 October 2019 | −2.8°C9 October 2001 | 27 / 27 |
| November | 12.3°C | 1.7°C | 27.8°C6 November 2024 | −9.3°C19 November 2014 | 27 / 27 |
| December | 6.4°C | −2.5°C | 22.8°C5 December 2001 | −18.3°C7 December 2002 | 27 / 27 |
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 26 to 28 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.