Adak climate by month
Averages and records for each calendar month at Adak , United States, from 1942 to 2026. The warmest month is August, averaging 13.5°C; the coolest is January at 2.7°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 2.7°C | −1.9°C | 11.1°C2 January 1947 | −16.1°C3 January 1963 | 61 / 64 |
| February | 2.9°C | −1.8°C | 12.2°C10 February 1982 | −16.1°C3 February 1964 | 59 / 64 |
| March | 3.8°C | −0.9°C | 13.9°C30 March 1982 | −11.7°C15 March 1946 | 61 / 64 |
| April | 5.3°C | 0.6°C | 13.3°C20 April 1962 | −6.7°C7 April 1993 | 61 / 62 |
| May | 7.2°C | 2.6°C | 18.3°C28 May 1964 | −6.7°C3 May 1971 | 60 / 63 |
| June | 9.5°C | 4.9°C | 19.4°C26 June 1979 | −1.7°C2 June 1971 | 61 / 63 |
| July | 12.3°C | 7.1°C | 22.8°C31 July 1993 | 0.6°C23 July 1971 | 58 / 63 |
| August | 13.5°C | 8.3°C | 23.9°C8 August 1956 | 0.6°C25 August 1963 | 61 / 63 |
| September | 11.5°C | 6.6°C | 21.7°C2 September 1984 | −2.2°C27 September 1958 | 59 / 64 |
| October | 8.5°C | 3.6°C | 17.2°C20 October 2024 | −5.6°C26 October 1968 | 59 / 62 |
| November | 5.5°C | 0.8°C | 17.2°C14 November 2023 | −11.1°C29 November 1969 | 58 / 65 |
| December | 3.5°C | −1.1°C | 12.8°C7 December 1950 | −13.3°C31 December 1979 | 61 / 65 |
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 58 to 61 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.