Friday Harbor Arpt climate by month
Averages and records for each calendar month at Friday Harbor Arpt, United States, from 1998 to 2026. The warmest month is August, averaging 22.8°C; the coolest is December at 7.7°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 8.1°C | 2.6°C | 16.7°C29 January 2024 | −12.1°C12 January 2024 | 29 / 29 |
| February | 8.6°C | 2.0°C | 21.7°C27 February 2025 | −8.2°C25 February 2011 | 29 / 29 |
| March | 11.0°C | 3.1°C | 24.4°C17 March 2024 | −7.1°C10 March 2009 | 29 / 29 |
| April | 13.8°C | 4.3°C | 27.2°C25 April 2025 | −2.7°C1 April 2008 | 29 / 29 |
| May | 17.3°C | 6.5°C | 31.7°C13 May 2023 | −1.1°C7 May 2002 | 29 / 29 |
| June | 19.9°C | 8.6°C | 38.3°C28 June 2021 | 2.2°C1 June 1999 | 28 / 29 |
| July | 22.5°C | 9.7°C | 36.1°C29 July 2009 | 4.4°C3 July 2000 | 29 / 29 |
| August | 22.8°C | 10.0°C | 33.9°C19 August 2016 | 5.6°C12 August 2000 | 29 / 29 |
| September | 19.9°C | 8.7°C | 31.7°C3 September 2017 | 2.2°C23 September 2000 | 28 / 29 |
| October | 14.5°C | 6.4°C | 25.6°C7 October 2023 | −3.3°C31 October 2002 | 28 / 28 |
| November | 10.2°C | 4.0°C | 18.9°C8 November 2016 | −11.0°C23 November 2010 | 28 / 28 |
| December | 7.7°C | 2.4°C | 15.0°C29 December 2023 | −13.2°C20 December 2008 | 28 / 28 |
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 28 to 29 years each.
See what Friday Harbor 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.