Hagerstown Rgnl climate by month
Averages and records for each calendar month at Hagerstown Rgnl, United States, from 1998 to 2026. The warmest month is July, averaging 30.5°C; the coolest is January at 4.1°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 4.1°C | −4.0°C | 21.7°C29 January 2002 | −18.8°C7 January 2014 | 28 / 28 |
| February | 6.3°C | −2.8°C | 27.8°C21 February 2018 | −17.1°C16 February 2015 | 28 / 28 |
| March | 12.0°C | 1.3°C | 29.4°C22 March 2026 | −16.6°C6 March 2015 | 28 / 28 |
| April | 18.3°C | 6.7°C | 34.4°C6 April 2010 | −5.5°C4 April 2013 | 28 / 28 |
| May | 23.3°C | 12.3°C | 35.6°C30 May 2006 | −0.5°C9 May 2020 | 28 / 28 |
| June | 28.1°C | 17.2°C | 38.9°C29 June 2012 | 7.2°C2 June 2003 | 28 / 28 |
| July | 30.5°C | 19.7°C | 38.9°C16 July 2024 | 10.0°C2 July 2001 | 28 / 28 |
| August | 29.2°C | 18.7°C | 38.3°C12 August 2021 | 8.9°C31 August 1999 | 28 / 28 |
| September | 25.4°C | 14.8°C | 36.1°C2 September 2010 | 2.8°C30 September 2000 | 27 / 28 |
| October | 18.8°C | 8.5°C | 33.9°C2 October 2019 | −3.8°C30 October 2011 | 28 / 28 |
| November | 12.6°C | 2.8°C | 28.3°C6 November 2024 | −8.3°C24 November 2000 | 28 / 28 |
| December | 6.6°C | −1.5°C | 23.9°C6 December 1998 | −16.6°C24 December 2022 | 28 / 28 |
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 27 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.