December weather in Friday Harbor, WA
The average temperature in Friday Harbor in December is 41.6°F (36.8°F–46.3°F). Average precipitation: 2.45 inches.
December is a winter month in Friday Harbor, and is cooler than the annual average of 50.9°F. Daily temperatures swing about 9.5°F between overnight low and afternoon high. Expect about 16 days with precipitation. Daylight averages about 8h 6m. For travel, December is cool.
Avg High
46.3°F
Avg Low
36.8°F
Precipitation
2.45 in
Daylight
8h 6m
December records in Friday Harbor
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 55.0°F (2021) | 21.2°F (2014) | 0.35 in (2023) |
| December 2 | 54.0°F (2008) | 25.2°F (2014) | 0.49 in (2007) |
| December 3 | 55.9°F (2023) | 27.1°F (2013) | 0.86 in (2007) |
| December 4 | 55.9°F (2023) | 19.2°F (2013) | 0.66 in (2023) |
| December 5 | 57.0°F (2023) | 21.2°F (2013) | 0.28 in (2023) |
| December 6 | 55.0°F (2024) | 22.1°F (2013) | 0.29 in (1999) |
| December 7 | 54.0°F (2010) | 15.3°F (2013) | 0.56 in (2023) |
| December 8 | 55.9°F (2014) | 16.2°F (2013) | 1.20 in (2010) |
| December 9 | 57.9°F (2014) | 20.1°F (2009) | 0.67 in (2004) |
| December 10 | 57.0°F (2014) | 20.1°F (2009) | 1.76 in (2025) |
| December 11 | 55.0°F (2014) | 28.9°F (2001) | 1.10 in (2021) |
| December 12 | 55.9°F (2002) | 27.1°F (2011) | 1.68 in (2010) |
| December 13 | 54.0°F (1998) | 21.0°F (2000) | 0.94 in (2001) |
| December 14 | 57.9°F (2018) | 21.0°F (2000) | 0.56 in (2006) |
| December 15 | 57.9°F (2025) | 21.2°F (2008) | 1.11 in (1999) |
| December 16 | 53.1°F (1999) | 15.3°F (2008) | 1.58 in (2025) |
| December 17 | 54.0°F (2024) | 21.2°F (2016) | 0.87 in (2024) |
| December 18 | 55.9°F (2024) | 21.2°F (2008) | 1.14 in (2021) |
| December 19 | 55.0°F (2023) | 10.2°F (2008) | 0.81 in (2017) |
| December 20 | 57.0°F (2018) | 8.2°F (2008) | 0.41 in (2022) |
| December 21 | 55.0°F (2005) | 8.2°F (2022) | 2.50 in (2020) |
| December 22 | 55.0°F (2005) | 10.2°F (2022) | 0.41 in (2005) |
| December 23 | 54.0°F (2024) | 16.2°F (2008) | 0.36 in (2016) |
| December 24 | 57.0°F (2005) | 24.3°F (2017) | 0.19 in (2005) |
| December 25 | 55.0°F (2005) | 22.1°F (2021) | 0.71 in (1998) |
| December 26 | 54.0°F (2022) | 14.2°F (2021) | 0.23 in (2024) |
| December 27 | 57.9°F (2023) | 10.2°F (2021) | 0.40 in (2011) |
| December 28 | 57.0°F (2023) | 15.3°F (2021) | 0.38 in (2011) |
| December 29 | 59.0°F (2023) | 23.2°F (2021) | 1.07 in (1998) |
| December 30 | 57.0°F (2023) | 23.2°F (2014) | 0.33 in (2023) |
| December 31 | 52.0°F (2019) | 20.1°F (2021) | 0.30 in (2000) |