Weather on December 21
Renton, WA
55 Years of Data
Avg High
46°F
Avg Low
35°F
Warmest
2014
53°F avg
Coldest
1990
15°F avg
About This Date
December 21st in Renton, 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 21st was in 2014 (53°F average), while the coldest was 1990 (15°F) — a 38°F range across recorded history. Rain or other precipitation has occurred on about 60% of December 21st dates historically, with the wettest December 21st recording 2.21" 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 21st in Renton, WA? Bring layers as temperatures can vary throughout the day. Consider bringing rain gear or an umbrella.
Warming Trend
0.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 48° | 43° | 45° | 0.61" | — |
| 2024 | 53° | 44° | 49° | 0.33" | — |
| 2023 | 48° | 41° | 45° | — | — |
| 2022 | 32° | 20° | 26° | — | — |
| 2021 | 40° | 35° | 37° | 0.28" | — |
| 2020 | 61° | 35° | 48° | 2.21" | — |
| 2019 | 51° | 43° | 47° | 0.64" | — |
| 2018 | 44° | 34° | 39° | — | — |
| 2017 | 43° | 29° | 36° | — | — |
| 2016 | 49° | 34° | 41° | — | — |
| 2015 | 43° | 36° | 39° | 1.83" | — |
| 2014warmest | 56° | 51° | 53° | — | — |
| 2013 | 46° | 41° | 44° | 0.66" | — |
| 2012 | 48° | 32° | 40° | 0.08" | — |
| 2011 | 46° | 30° | 38° | — | — |
| 2010 | 53° | 41° | 47° | 0.03" | — |
| 2009 | 50° | 39° | 45° | 1.63" | — |
| 2008 | 32° | 26° | 29° | 0.63" | — |
| 2007 | 43° | 31° | 37° | — | — |
| 2006 | 51° | 39° | 45° | 1.24" | — |
| 2005 | 51° | 47° | 49° | 1.07" | — |
| 2004 | 48° | 33° | 41° | — | — |
| 2003 | 51° | 38° | 44° | 0.05" | — |
| 2002 | 46° | 41° | 44° | — | — |
| 2001 | 46° | 34° | 40° | — | — |
| 2000 | 50° | 39° | 45° | 0.23" | — |
| 1999 | 47° | 36° | 41° | — | — |
| 1998 | 27° | 19° | 23° | — | — |
| 1997 | 45° | 34° | 39° | 0.13" | — |
| 1996 | 43° | 36° | 39° | 0.25" | — |
| 1995 | 53° | 33° | 43° | — | — |
| 1994 | 54° | 43° | 48° | 0.05" | — |
| 1993 | 42° | 28° | 35° | — | — |
| 1992 | 45° | 40° | 42° | 1.47" | — |
| 1991 | 47° | 34° | 40° | — | — |
| 1990coldest | 21° | 8° | 15° | — | — |
| 1989 | 51° | 40° | 45° | — | — |
| 1988 | 43° | 32° | 37° | 0.18" | — |
| 1987 | 45° | 35° | 40° | 0.25" | — |
| 1986 | 48° | 39° | 44° | 0.66" | — |
| 1985 | 38° | 25° | 31° | — | — |
| 1984 | 45° | 32° | 38° | — | — |
| 1983 | 25° | 15° | 20° | — | — |
| 1982 | 48° | 34° | 41° | 0.43" | — |
| 1981 | 41° | 34° | 37° | 0.18" | — |
| 1980 | 52° | 41° | 46° | 1.88" | — |
| 1979 | 51° | 42° | 47° | 1.63" | — |
| 1978 | 45° | 39° | 42° | 0.03" | — |
| 1977 | 50° | 36° | 43° | — | — |
| 1976 | 48° | 28° | 38° | 0.08" | — |
| 1975 | 51° | 25° | 38° | 0.05" | — |
| 1974 | 56° | 36° | 46° | 1.4" | — |
| 1973 | 55° | 39° | 47° | 0.1" | — |
| 1972 | 58° | 47° | 52° | 2.03" | — |
| 1971 | 41° | 33° | 37° | 1.52" | — |
55 years of data from RENTON MUNI AP