Ellsworth AFB climate by month
Averages and records for each calendar month at Ellsworth AFB, United States, from 1949 to 2026. The warmest month is July, averaging 29.8°C; the coolest is January at 0.2°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 0.2°C | −11.4°C | 19.4°C9 January 1953 | −31.7°C21 January 1949 | 24 / 24 |
| February | 2.8°C | −8.6°C | 22.2°C8 February 1954 | −28.3°C19 February 2025 | 24 / 24 |
| March | 6.0°C | −5.3°C | 28.9°C19 March 2026 | −27.8°C1 March 1962 | 24 / 24 |
| April | 13.2°C | 1.0°C | 32.6°C22 April 2026 | −14.4°C20 April 1966 | 24 / 24 |
| May | 19.3°C | 7.4°C | 36.1°C27 May 1969 | −6.7°C3 May 1954 | 24 / 24 |
| June | 24.6°C | 12.6°C | 40.6°C29 June 1961 | −0.6°C1 June 1951 | 24 / 24 |
| July | 29.8°C | 16.6°C | 42.8°C16 July 1966 | 5.6°C1 July 1959 | 24 / 24 |
| August | 29.3°C | 15.6°C | 40.6°C11 August 1969 | 5.0°C12 August 1964 | 24 / 24 |
| September | 23.0°C | 9.7°C | 39.4°C4 September 1960 | −2.8°C28 September 1951 | 22 / 24 |
| October | 17.0°C | 4.0°C | 38.0°C2 October 2025 | −10.0°C31 October 1951 | 23 / 23 |
| November | 8.5°C | −3.1°C | 24.4°C4 November 1952 | −25.6°C13 November 1959 | 23 / 23 |
| December | 3.2°C | −8.0°C | 22.8°C4 December 1965 | −30.0°C17 December 1964 | 22 / 22 |
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 22 to 24 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.