San Nicholas Island Arpt climate by month
Averages and records for each calendar month at San Nicholas Island Arpt, United States, from 1933 to 2026. The warmest month is September, averaging 22.1°C; the coolest is January at 16.2°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 16.2°C | 9.3°C | 28.3°C14 January 1975 | 0.6°C10 January 1949 | 41 / 42 |
| February | 16.3°C | 9.7°C | 29.4°C24 February 1986 | 2.8°C27 February 1966 | 39 / 42 |
| March | 16.5°C | 9.8°C | 32.2°C17 March 2026 | 1.1°C17 March 1951 | 42 / 44 |
| April | 17.5°C | 10.3°C | 33.3°C12 April 2008 | 3.3°C5 April 1948 | 44 / 44 |
| May | 18.2°C | 11.3°C | 32.8°C13 May 1979 | 5.0°C26 May 1948 | 43 / 44 |
| June | 19.3°C | 12.3°C | 33.9°C22 June 2008 | 5.0°C1 June 1948 | 43 / 44 |
| July | 21.0°C | 13.5°C | 35.0°C2 July 1985 | 6.7°C17 July 1946 | 43 / 44 |
| August | 21.9°C | 14.3°C | 36.7°C28 August 2009 | 7.8°C2 August 1946 | 46 / 48 |
| September | 22.1°C | 14.6°C | 39.4°C27 September 1970 | 7.8°C25 September 1948 | 46 / 48 |
| October | 21.3°C | 13.5°C | 37.8°C13 October 1950 | 4.4°C30 October 1971 | 44 / 44 |
| November | 18.9°C | 11.6°C | 31.7°C4 November 1949 | 3.3°C21 November 1979 | 42 / 42 |
| December | 16.6°C | 10.0°C | 30.6°C15 December 1980 | 1.7°C12 December 1972 | 42 / 43 |
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 39 to 46 years each.
See what San Nicholas Island Arpt is doing right now
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.