Whidbey Island climate by month
Averages and records for each calendar month at Whidbey Island, United States, from 1945 to 2026. The warmest month is August, averaging 19.5°C; the coolest is January at 7.8°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 7.8°C | 1.8°C | 18.3°C19 January 1981 | −18.3°C25 January 1950 | 72 / 72 |
| February | 9.3°C | 2.2°C | 21.1°C27 February 1986 | −14.4°C1 February 1950 | 73 / 73 |
| March | 10.9°C | 3.5°C | 24.4°C19 March 2019 | −8.9°C4 March 1955 | 74 / 74 |
| April | 13.0°C | 5.3°C | 25.6°C29 April 1976 | −3.8°C4 April 2011 | 75 / 75 |
| May | 15.5°C | 7.9°C | 27.8°C13 May 1959 | 0.0°C1 May 1954 | 73 / 74 |
| June | 17.5°C | 10.0°C | 29.4°C9 June 1955 | 2.8°C19 June 1955 | 73 / 74 |
| July | 19.1°C | 11.2°C | 31.1°C19 July 2015 | 4.4°C31 July 2009 | 73 / 74 |
| August | 19.5°C | 11.3°C | 31.1°C8 August 1960 | 3.9°C29 August 1980 | 74 / 75 |
| September | 18.0°C | 9.3°C | 31.1°C6 September 1986 | −1.7°C27 September 1972 | 73 / 75 |
| October | 14.2°C | 6.5°C | 24.4°C5 October 2005 | −5.6°C28 October 1971 | 72 / 74 |
| November | 10.4°C | 4.0°C | 22.2°C8 November 2016 | −12.8°C15 November 1955 | 72 / 73 |
| December | 7.9°C | 2.2°C | 17.2°C10 December 2014 | −16.1°C16 December 1964 | 71 / 72 |
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 71 to 75 years each.
See what Whidbey Island 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.