Arcata Arpt climate by month
Averages and records for each calendar month at Arcata Arpt, United States, from 1992 to 2026. The warmest month is September, averaging 18.2°C; the coolest is February at 13.1°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 13.4°C | 4.6°C | 24.4°C22 January 2022 | −4.9°C13 January 2007 | 34 / 34 |
| February | 13.1°C | 4.3°C | 26.7°C8 February 2016 | −3.8°C26 February 2011 | 34 / 34 |
| March | 13.4°C | 4.8°C | 24.4°C31 March 2000 | −2.7°C16 March 2021 | 34 / 34 |
| April | 14.0°C | 5.7°C | 26.1°C1 April 2000 | −1.6°C4 April 2009 | 35 / 35 |
| May | 15.2°C | 7.6°C | 34.4°C15 May 2008 | −1.1°C9 May 1999 | 35 / 35 |
| June | 16.8°C | 9.1°C | 28.9°C11 June 2019 | 2.2°C8 June 1999 | 35 / 35 |
| July | 17.4°C | 10.8°C | 27.8°C8 July 2008 | 5.6°C6 July 1993 | 35 / 35 |
| August | 17.9°C | 10.7°C | 27.2°C15 August 2020 | 3.3°C26 August 1995 | 35 / 35 |
| September | 18.2°C | 9.2°C | 35.6°C2 September 2017 | 2.8°C21 September 1993 | 34 / 35 |
| October | 17.2°C | 7.2°C | 32.8°C25 October 2003 | −1.7°C31 October 2002 | 34 / 34 |
| November | 14.8°C | 5.5°C | 26.1°C26 November 2002 | −2.8°C28 November 2004 | 34 / 34 |
| December | 13.1°C | 4.3°C | 23.3°C22 December 1999 | −5.6°C17 December 2005 | 33 / 33 |
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 33 to 35 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.