Eureka climate by month
Averages and records for each calendar month at Eureka, United States, from 1953 to 1968. The warmest month is July, averaging 16.5°C; the coolest is January at −13.6°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | −13.6°C | −22.6°C | 7.8°C20 January 1961 | −41.7°C27 January 1962 | 11 / 13 |
| February | −10.1°C | −20.1°C | 4.4°C25 February 1963 | −42.2°C5 February 1968 | 12 / 12 |
| March | −7.4°C | −19.1°C | 5.6°C23 March 1965 | −39.4°C14 March 1964 | 12 / 12 |
| April | 0.2°C | −11.2°C | 10.0°C29 April 1960 | −25.6°C18 April 1959 | 12 / 12 |
| May | 8.2°C | −2.7°C | 23.9°C24 May 1960 | −22.2°C10 May 1964 | 13 / 13 |
| June | 14.7°C | 3.3°C | 29.4°C7 June 1958 | −7.8°C5 June 1962 | 12 / 13 |
| July | 16.5°C | 5.4°C | 30.6°C25 July 1953 | −1.1°C12 July 1958 | 12 / 13 |
| August | 14.9°C | 4.5°C | 26.1°C6 August 1968 | −3.3°C31 August 1962 | 12 / 13 |
| September | 9.3°C | 0.1°C | 18.3°C2 September 1963 | −7.2°C28 September 1958 | 11 / 12 |
| October | −0.9°C | −9.4°C | 10.6°C1 October 1954 | −27.8°C31 October 1961 | 12 / 12 |
| November | −9.1°C | −17.9°C | 6.7°C25 November 1962 | −35.6°C24 November 1963 | 12 / 13 |
| December | −13.2°C | −22.6°C | 2.8°C12 December 1963 | −41.7°C11 December 1964 | 11 / 13 |
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 11 to 13 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.