Weather on December 15
Seattle, WA
55 Years of Data
Avg High
47°F
Avg Low
38°F
Warmest
1980
55°F avg
Coldest
2008
27°F avg
About This Date
December 15th in Seattle, WA typically brings chilly winter weather, with average highs around 47°F and lows near 38°F. Over 55 years of records, the warmest December 15th was in 1980 (55°F average), while the coldest was 2008 (27°F) — a 28°F range across recorded history. Rain or other precipitation has occurred on about 60% of December 15th dates historically, with the wettest December 15th recording 3.35" of rain. The last decade has been 1.2°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.2°F cooler on this date compared to 20-30 years ago.
Planning for December 15th in Seattle, WA? Bring layers as temperatures can vary throughout the day. Consider bringing rain gear or an umbrella.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 59° | 49° | 54° | 1.88" | — |
| 2024 | 49° | 40° | 44° | — | — |
| 2023 | 54° | 38° | 46° | — | — |
| 2022 | 42° | 29° | 36° | — | — |
| 2021 | 44° | 36° | 40° | — | — |
| 2020 | 49° | 41° | 45° | 0.2" | — |
| 2019 | 43° | 35° | 39° | 0.3" | — |
| 2018 | 51° | 41° | 46° | 0.23" | — |
| 2017 | 45° | 36° | 40° | 0.05" | — |
| 2016 | 39° | 34° | 36° | — | — |
| 2015 | 47° | 33° | 40° | 0.05" | — |
| 2014 | 57° | 41° | 49° | — | — |
| 2013 | 53° | 48° | 51° | 0.08" | — |
| 2012 | 42° | 30° | 36° | 0.61" | — |
| 2011 | 44° | 38° | 41° | 0.08" | — |
| 2010 | 49° | 41° | 45° | 0.25" | — |
| 2009 | 49° | 38° | 43° | 0.76" | — |
| 2008coldest | 31° | 23° | 27° | — | — |
| 2007 | 46° | 41° | 44° | 0.63" | — |
| 2006 | 49° | 36° | 42° | 0.15" | — |
| 2005 | 41° | 24° | 33° | — | — |
| 2004 | 53° | 42° | 48° | — | — |
| 2003 | 47° | 39° | 43° | 0.03" | — |
| 2002 | 55° | 44° | 50° | 1.07" | — |
| 2001 | 49° | 39° | 44° | 1.6" | — |
| 2000 | 43° | 34° | 38° | — | — |
| 1999 | 53° | 49° | 51° | 2.57" | — |
| 1998 | 51° | 40° | 45° | — | — |
| 1997 | 49° | 42° | 45° | 1.3" | — |
| 1996 | 46° | 36° | 41° | 0.05" | — |
| 1995 | 51° | 41° | 46° | 0.03" | — |
| 1994 | 46° | 39° | 43° | 1.04" | — |
| 1993 | 47° | 43° | 45° | — | — |
| 1992 | 43° | 32° | 37° | — | — |
| 1991 | 40° | 29° | 34° | — | — |
| 1990 | 46° | 35° | 41° | 0.53" | — |
| 1989 | 43° | 38° | 40° | — | — |
| 1988 | 44° | 30° | 37° | — | — |
| 1987 | 39° | 32° | 36° | — | — |
| 1986 | 54° | 41° | 47° | — | — |
| 1985 | 48° | 34° | 41° | — | — |
| 1984 | 43° | 37° | 40° | 0.36" | — |
| 1983 | 43° | 37° | 40° | — | — |
| 1982 | 55° | 45° | 50° | 2.01" | — |
| 1981 | 45° | 42° | 43° | 2.72" | — |
| 1980warmest | 65° | 45° | 55° | — | — |
| 1979 | 40° | 34° | 37° | 0.99" | — |
| 1978 | 45° | 34° | 39° | — | — |
| 1977 | 48° | 43° | 45° | 2.46" | — |
| 1976 | 60° | 48° | 54° | 0.18" | — |
| 1975 | 45° | 35° | 40° | 0.28" | — |
| 1974 | 54° | 41° | 47° | 0.36" | — |
| 1973 | 53° | 44° | 49° | 3.35" | — |
| 1972 | 42° | 30° | 36° | 0.69" | — |
| 1971 | 43° | 37° | 40° | 0.1" | — |
55 years of data from SEATTLE URBAN SITE