Eureka Arpt climate by month
Averages and records for each calendar month at Eureka Arpt, United States, from 1997 to 2026. The warmest month is July, averaging 33.0°C; the coolest is January at 4.3°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 4.3°C | −10.6°C | 17.2°C31 January 2003 | −31.7°C30 January 2002 | 29 / 29 |
| February | 6.1°C | −8.6°C | 20.6°C13 February 2015 | −25.5°C7 February 2019 | 29 / 29 |
| March | 11.3°C | −4.8°C | 28.9°C25 March 2026 | −26.0°C6 March 2018 | 29 / 29 |
| April | 15.3°C | −2.4°C | 30.0°C22 April 2012 | −14.4°C17 April 2026 | 29 / 29 |
| May | 20.7°C | 1.5°C | 35.0°C28 May 2003 | −11.7°C1 May 2008 | 29 / 29 |
| June | 28.1°C | 5.8°C | 38.3°C29 June 2013 | −7.2°C4 June 2001 | 29 / 29 |
| July | 33.0°C | 10.5°C | 39.4°C12 July 2002 | 0.6°C11 July 2016 | 29 / 29 |
| August | 31.4°C | 9.4°C | 38.3°C1 August 2026 | −1.7°C31 August 2005 | 29 / 30 |
| September | 26.1°C | 4.6°C | 37.2°C5 September 2020 | −8.9°C24 September 2000 | 29 / 30 |
| October | 18.4°C | −1.6°C | 31.7°C1 October 2010 | −22.7°C30 October 2019 | 29 / 29 |
| November | 10.7°C | −6.5°C | 23.9°C4 November 2010 | −25.6°C29 November 2006 | 29 / 29 |
| December | 4.5°C | −10.7°C | 18.9°C19 December 2025 | −27.7°C31 December 2015 | 29 / 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 29 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.