Fredericksburg/Shannon Arpt climate by month
Averages and records for each calendar month at Fredericksburg/Shannon Arpt, United States, from 1995 to 2026. The warmest month is July, averaging 31.5°C; the coolest is January at 8.1°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 8.1°C | −3.6°C | 27.8°C31 January 2002 | −20.0°C8 January 2018 | 29 / 30 |
| February | 9.8°C | −2.8°C | 27.2°C24 February 2023 | −22.2°C5 February 1996 | 29 / 30 |
| March | 14.6°C | 1.2°C | 32.2°C31 March 1998 | −15.0°C4 March 2014 | 27 / 30 |
| April | 20.6°C | 6.4°C | 35.0°C18 April 2002 | −6.7°C2 April 2013 | 29 / 31 |
| May | 24.5°C | 11.9°C | 37.8°C20 May 2026 | 0.0°C10 May 2020 | 26 / 31 |
| June | 29.2°C | 17.2°C | 38.9°C30 June 2012 | 7.2°C5 June 1997 | 26 / 32 |
| July | 31.5°C | 19.9°C | 38.9°C7 July 2010 | 11.7°C3 July 2001 | 28 / 32 |
| August | 30.7°C | 19.0°C | 39.4°C9 August 2007 | 10.6°C21 August 1998 | 28 / 31 |
| September | 27.2°C | 15.1°C | 37.2°C2 September 2026 | 5.6°C23 September 1999 | 26 / 31 |
| October | 21.4°C | 8.2°C | 35.6°C3 October 2019 | −2.2°C23 October 1997 | 28 / 29 |
| November | 15.3°C | 1.8°C | 28.9°C1 November 2024 | −8.3°C19 November 2014 | 28 / 29 |
| December | 10.3°C | −1.9°C | 26.7°C7 December 1998 | −13.9°C29 December 2001 | 27 / 29 |
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 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.