Alturas Muni climate by month
Averages and records for each calendar month at Alturas Muni, United States, from 1998 to 2026. The warmest month is July, averaging 32.5°C; the coolest is December at 5.7°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 6.6°C | −6.7°C | 20.0°C25 January 2015 | −30.5°C6 January 2017 | 28 / 28 |
| February | 8.0°C | −5.8°C | 20.0°C28 February 2025 | −23.2°C26 February 2011 | 28 / 28 |
| March | 11.6°C | −3.8°C | 27.8°C20 March 2026 | −21.1°C8 March 2002 | 28 / 28 |
| April | 15.1°C | −1.7°C | 28.9°C22 April 2012 | −12.1°C4 April 2009 | 28 / 28 |
| May | 20.5°C | 2.2°C | 33.9°C31 May 2001 | −9.9°C6 May 2010 | 28 / 28 |
| June | 26.4°C | 5.5°C | 40.6°C28 June 2021 | −5.6°C4 June 2001 | 29 / 29 |
| July | 32.5°C | 8.3°C | 41.7°C10 July 2002 | −0.5°C11 July 2016 | 29 / 29 |
| August | 31.1°C | 6.8°C | 38.9°C9 August 2018 | −2.2°C31 August 1999 | 28 / 28 |
| September | 26.6°C | 2.8°C | 38.9°C4 September 2020 | −6.1°C24 September 2000 | 28 / 29 |
| October | 18.8°C | −1.7°C | 32.8°C1 October 2010 | −17.8°C31 October 2002 | 28 / 28 |
| November | 10.6°C | −4.6°C | 25.6°C2 November 2020 | −21.0°C28 November 2015 | 28 / 28 |
| December | 5.7°C | −6.9°C | 18.9°C1 December 2021 | −32.7°C8 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 28 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.