Weather on December 9
Seattle, WA
55 Years of Data
Avg High
47°F
Avg Low
36°F
Warmest
2014
56°F avg
Coldest
2009
26°F avg
About This Date
December 9th in Seattle, WA typically brings chilly winter weather, with average highs around 47°F and lows near 36°F. Over 55 years of records, the warmest December 9th was in 2014 (56°F average), while the coldest was 2009 (26°F) — a 30°F range across recorded history. Rain or other precipitation has occurred on about 62% of December 9th dates historically, with the wettest December 9th recording 3.66" of rain. Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for December 9th 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 | 54° | 48° | 51° | 0.36" | — |
| 2024 | 51° | 38° | 44° | — | — |
| 2023 | 41° | 34° | 37° | 0.48" | — |
| 2022 | 44° | 35° | 40° | 0.97" | — |
| 2021 | 44° | 34° | 39° | — | — |
| 2020 | 50° | 39° | 45° | — | — |
| 2019 | 48° | 42° | 45° | — | — |
| 2018 | 49° | 41° | 45° | 1.35" | — |
| 2017 | 44° | 29° | 37° | — | — |
| 2016 | 36° | 31° | 34° | 0.74" | — |
| 2015 | 58° | 46° | 52° | 1.4" | — |
| 2014warmest | 63° | 50° | 56° | 1.09" | — |
| 2013 | 35° | 21° | 28° | — | — |
| 2012 | 45° | 37° | 41° | 0.15" | — |
| 2011 | 42° | 28° | 35° | — | — |
| 2010 | 52° | 46° | 49° | 2.51" | — |
| 2009coldest | 35° | 16° | 26° | — | — |
| 2008 | 48° | 43° | 45° | 0.25" | — |
| 2007 | 38° | 26° | 32° | — | — |
| 2006 | 52° | 37° | 44° | 0.46" | — |
| 2005 | 48° | 29° | 38° | — | — |
| 2004 | 50° | 39° | 45° | 1.7" | — |
| 2003 | 49° | 32° | 40° | — | — |
| 2002 | 49° | 32° | 40° | 0.28" | — |
| 2001 | 45° | 35° | 40° | 0.15" | — |
| 2000 | 44° | 34° | 39° | 0.08" | — |
| 1999 | 49° | 42° | 45° | 0.46" | — |
| 1998 | 49° | 35° | 42° | — | — |
| 1997 | 47° | 33° | 40° | 0.03" | — |
| 1996 | 51° | 35° | 43° | 0.25" | — |
| 1995 | 41° | 32° | 37° | 2.11" | — |
| 1994 | 46° | 37° | 42° | 0.05" | — |
| 1993 | 56° | 43° | 49° | 3.51" | — |
| 1992 | 44° | 37° | 41° | — | — |
| 1991 | 49° | 37° | 43° | 1.32" | — |
| 1990 | 51° | 47° | 49° | 0.69" | — |
| 1989 | 50° | 40° | 45° | — | — |
| 1988 | 51° | 48° | 50° | 0.03" | — |
| 1987 | 56° | 42° | 49° | 3.66" | — |
| 1986 | 49° | 33° | 41° | — | — |
| 1985 | 41° | 32° | 37° | — | — |
| 1984 | 42° | 38° | 40° | 0.38" | — |
| 1983 | 45° | 41° | 43° | 2.87" | — |
| 1982 | 47° | 34° | 40° | — | — |
| 1981 | 50° | 44° | 47° | 1.19" | — |
| 1980 | 46° | 29° | 37° | — | — |
| 1979 | 54° | 36° | 45° | 0.86" | — |
| 1978 | 45° | 37° | 41° | 0.28" | — |
| 1977 | 39° | 32° | 36° | 0.13" | — |
| 1976 | 48° | 38° | 43° | — | — |
| 1975 | 53° | 44° | 49° | 0.08" | — |
| 1974 | 53° | 44° | 49° | 0.08" | — |
| 1973 | 46° | 33° | 40° | — | — |
| 1972 | 32° | 21° | 27° | — | — |
| 1971 | 43° | 38° | 40° | 0.76" | — |
55 years of data from SEATTLE URBAN SITE