December weather in Federal Way, WA
The average temperature in Federal Way in December is 42.1°F (36.9°F–47.3°F). Average precipitation: 6.02 inches.
December is a winter month in Federal Way, and is cooler than the annual average of 53.7°F. Daily temperatures swing about 10.4°F between overnight low and afternoon high. Expect about 20 days with precipitation. Daylight averages about 8h 17m. For travel, December is a wet month.
Avg High
47.3°F
Avg Low
36.9°F
Precipitation
6.02 in
Daylight
8h 17m
December records in Federal Way
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 59.0°F (2008) | 17.1°F (1985) | 1.21 in (2012) |
| December 2 | 57.9°F (2003) | 24.1°F (2014) | 1.51 in (2007) |
| December 3 | 61.0°F (2015) | 24.1°F (1984) | 2.47 in (2007) |
| December 4 | 61.0°F (1989) | 21.9°F (1994) | 2.14 in (1989) |
| December 5 | 59.0°F (1993) | 23.0°F (1984) | 2.35 in (2023) |
| December 6 | 59.0°F (1993) | 25.0°F (1984) | 0.75 in (1987) |
| December 7 | 55.9°F (2025) | 21.0°F (2013) | 0.90 in (2015) |
| December 8 | 59.0°F (2015) | 16.0°F (2013) | 1.94 in (2015) |
| December 9 | 62.1°F (2014) | 19.9°F (2013) | 1.16 in (2015) |
| December 10 | 68.0°F (1993) | 26.1°F (1986) | 1.55 in (2025) |
| December 11 | 60.1°F (2014) | 27.0°F (1985) | 1.21 in (2021) |
| December 12 | 64.9°F (1995) | 24.1°F (1985) | 1.41 in (2010) |
| December 13 | 60.1°F (1995) | 26.1°F (2011) | 1.54 in (2001) |
| December 14 | 62.1°F (2002) | 26.1°F (1985) | 0.92 in (2006) |
| December 15 | 59.0°F (2025) | 25.0°F (2008) | 1.51 in (1999) |
| December 16 | 57.0°F (2025) | 21.0°F (2008) | 1.69 in (1997) |
| December 17 | 57.9°F (1994) | 21.9°F (2016) | 1.04 in (2024) |
| December 18 | 57.0°F (2024) | 21.9°F (2016) | 0.83 in (2018) |
| December 19 | 57.9°F (1994) | 18.0°F (1984) | 1.32 in (2017) |
| December 20 | 60.1°F (2018) | 16.0°F (1990) | 3.18 in (2019) |
| December 21 | 60.1°F (2020) | 9.0°F (1990) | 1.42 in (2020) |
| December 22 | 57.9°F (2005) | 12.0°F (1983) | 0.62 in (2021) |
| December 23 | 55.0°F (2014) | 6.1°F (1983) | 0.80 in (2018) |
| December 24 | 54.0°F (2022) | 12.0°F (1983) | 0.80 in (2022) |
| December 25 | 54.0°F (2002) | 25.0°F (1995) | 0.95 in (1998) |
| December 26 | 59.0°F (2022) | 19.9°F (1987) | 1.24 in (2022) |
| December 27 | 60.1°F (1994) | 19.0°F (2021) | 1.36 in (1994) |
| December 28 | 55.0°F (2022) | 21.0°F (1990) | 1.25 in (2011) |
| December 29 | 57.0°F (2023) | 9.0°F (1990) | 3.80 in (2011) |
| December 30 | 54.0°F (1995) | 21.0°F (1990) | 1.60 in (2022) |
| December 31 | 54.0°F (1993) | 21.9°F (2010) | 0.92 in (1996) |