St George Arpt climate by month
Averages and records for each calendar month at St George Arpt, United States, from 1996 to 2026. The warmest month is August, averaging 11.5°C; the coolest is January at −0.7°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | −0.7°C | −4.7°C | 6.1°C29 January 2004 | −17.8°C30 January 1997 | 25 / 28 |
| February | 0.3°C | −3.8°C | 6.7°C9 February 2019 | −21.0°C1 February 2012 | 25 / 28 |
| March | −0.5°C | −4.7°C | 6.7°C29 March 2019 | −19.9°C11 March 2010 | 25 / 28 |
| April | 2.2°C | −2.0°C | 8.9°C14 April 2020 | −19.3°C5 April 2012 | 24 / 29 |
| May | 5.2°C | 0.8°C | 17.2°C26 May 1997 | −10.5°C9 May 2024 | 28 / 30 |
| June | 8.5°C | 4.3°C | 16.7°C18 June 2015 | −3.3°C13 June 1999 | 26 / 30 |
| July | 10.6°C | 6.9°C | 21.7°C31 July 2014 | −1.0°C8 July 2012 | 26 / 30 |
| August | 11.5°C | 8.1°C | 18.9°C19 August 2019 | 0.0°C28 August 2008 | 24 / 29 |
| September | 9.8°C | 6.0°C | 15.0°C3 September 2016 | −2.7°C25 September 2009 | 26 / 29 |
| October | 6.3°C | 2.2°C | 11.1°C2 October 2014 | −8.9°C30 October 1999 | 25 / 30 |
| November | 3.1°C | −0.7°C | 8.3°C1 November 2018 | −10.0°C29 November 1996 | 25 / 29 |
| December | 1.0°C | −3.4°C | 7.2°C1 December 2022 | −16.1°C20 December 1999 | 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 24 to 28 years each.
See what St George Arpt is doing right now
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.