Frederick Rgnl climate by month
Averages and records for each calendar month at Frederick Rgnl, United States, from 1998 to 2026. The warmest month is July, averaging 36.8°C; the coolest is January at 12.4°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 12.4°C | −1.4°C | 28.9°C3 January 2006 | −16.6°C7 January 2017 | 27 / 28 |
| February | 14.4°C | 0.4°C | 35.6°C11 February 2017 | −21.1°C16 February 2021 | 29 / 29 |
| March | 20.1°C | 5.5°C | 37.2°C21 March 2026 | −13.2°C3 March 2014 | 29 / 29 |
| April | 24.6°C | 10.0°C | 38.9°C25 April 2012 | −3.3°C7 April 2009 | 28 / 29 |
| May | 29.5°C | 15.7°C | 44.4°C24 May 2000 | 0.0°C3 May 2013 | 28 / 29 |
| June | 34.4°C | 20.9°C | 45.0°C17 June 2011 | 11.1°C6 June 1998 | 27 / 29 |
| July | 36.8°C | 22.9°C | 45.6°C19 July 2022 | 16.1°C29 July 2005 | 28 / 29 |
| August | 36.7°C | 22.6°C | 45.6°C17 August 2023 | 14.4°C20 August 2015 | 29 / 29 |
| September | 32.0°C | 18.1°C | 44.4°C8 September 2023 | 6.1°C25 September 2000 | 27 / 29 |
| October | 25.6°C | 11.5°C | 39.4°C3 October 2000 | −4.9°C31 October 2019 | 28 / 28 |
| November | 18.7°C | 5.0°C | 33.9°C15 November 2025 | −8.8°C12 November 2019 | 28 / 28 |
| December | 13.1°C | 0.0°C | 31.1°C24 December 2021 | −14.9°C7 December 2013 | 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 29 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.