Weather on December 20
Federal Way, WA
55 Years of Data
Avg High
46°F
Avg Low
35°F
Warmest
1994
52°F avg
Coldest
1990
17°F avg
About This Date
December 20th in Federal Way, WA typically brings chilly winter weather, with average highs around 46°F and lows near 35°F. Over 55 years of records, the warmest December 20th was in 1994 (52°F average), while the coldest was 1990 (17°F) — a 35°F range across recorded history. Precipitation has occurred on 71% of recorded December 20th dates, with snow falling 2% of the time. The last decade has been 3.5°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.5°F warmer on this date compared to 20-30 years ago.
Planning for December 20th in Federal Way, WA? Bring layers as temperatures can vary throughout the day. Consider bringing rain gear or an umbrella.
Warming Trend
0.7°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 47° | 39° | 43° | 0.08" | — |
| 2024 | 53° | 43° | 48° | 0.13" | — |
| 2023 | 49° | 37° | 43° | — | — |
| 2022 | 41° | 29° | 35° | 1.42" | 1" |
| 2021 | 41° | 36° | 38° | 0.71" | — |
| 2020 | 57° | 46° | 52° | 0.13" | — |
| 2019 | 52° | 44° | 48° | 6.6" | — |
| 2018 | 58° | 42° | 50° | 1.02" | — |
| 2017 | 41° | 32° | 37° | 0.3" | — |
| 2016 | 50° | 41° | 46° | 1.55" | — |
| 2015 | 50° | 35° | 43° | 0.03" | — |
| 2014 | 49° | 43° | 46° | 1.57" | — |
| 2013 | 39° | 27° | 33° | 0.13" | — |
| 2012 | 48° | 32° | 40° | 1.27" | — |
| 2011 | 48° | 31° | 39° | — | — |
| 2010 | 43° | 34° | 38° | 0.38" | — |
| 2009 | 59° | 44° | 52° | 0.3" | — |
| 2008 | 26° | 17° | 22° | 0.03" | — |
| 2007 | 47° | 39° | 43° | 0.99" | — |
| 2006 | 43° | 34° | 38° | 0.23" | — |
| 2005 | 53° | 39° | 46° | 0.51" | — |
| 2004 | 48° | 38° | 43° | — | — |
| 2003 | 49° | 44° | 46° | 1.22" | — |
| 2002 | 51° | 43° | 47° | — | — |
| 2001 | 41° | 37° | 39° | 0.46" | — |
| 2000 | 42° | 30° | 36° | 0.13" | — |
| 1999 | 48° | 43° | 45° | — | — |
| 1998 | 27° | 17° | 22° | — | — |
| 1997 | 46° | 35° | 41° | — | — |
| 1996 | 44° | 35° | 40° | 0.71" | — |
| 1995 | 52° | 38° | 45° | — | — |
| 1994warmest | 58° | 46° | 52° | 3.56" | — |
| 1993 | 44° | 26° | 35° | — | — |
| 1992 | 45° | 38° | 41° | — | — |
| 1991 | 47° | 34° | 40° | — | — |
| 1990coldest | 21° | 12° | 17° | — | — |
| 1989 | 47° | 42° | 44° | — | — |
| 1988 | 49° | 39° | 44° | 0.51" | — |
| 1987 | 36° | 25° | 30° | 0.84" | — |
| 1986 | 46° | 28° | 37° | 0.05" | — |
| 1985 | 35° | 30° | 33° | 0.03" | — |
| 1984 | 33° | 18° | 25° | 0.43" | — |
| 1983 | 31° | 22° | 26° | — | — |
| 1982 | 46° | 37° | 42° | 1.27" | — |
| 1981 | 45° | 29° | 37° | 0.03" | — |
| 1980 | 48° | 38° | 43° | 1.14" | — |
| 1979 | 53° | 43° | 48° | 0.23" | — |
| 1978 | 40° | 30° | 35° | 0.2" | — |
| 1977 | 47° | 23° | 35° | 0.03" | — |
| 1976 | 47° | 31° | 39° | — | — |
| 1975 | 45° | 28° | 36° | — | — |
| 1974 | 56° | 44° | 50° | 1.02" | — |
| 1973 | 58° | 42° | 50° | 1.32" | — |
| 1972 | 53° | 48° | 51° | 0.89" | — |
| 1971 | 42° | 38° | 40° | 0.51" | — |
55 years of data from KENT