Weather on December 20
Renton, WA
55 Years of Data
Avg High
46°F
Avg Low
36°F
Warmest
1994
52°F avg
Coldest
1990
17°F avg
About This Date
December 20th in Renton, WA typically brings chilly winter weather, with average highs around 46°F and lows near 36°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. Rain or other precipitation has occurred on about 64% of December 20th dates historically, with the wettest December 20th recording 6.71" of rain. The last decade has been 3.8°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.8°F warmer on this date compared to 20-30 years ago.
Planning for December 20th in Renton, WA? Bring layers as temperatures can vary throughout the day. Consider bringing rain gear or an umbrella.
Warming Trend
0.9°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 47° | 42° | 44° | 0.74" | — |
| 2024 | 58° | 43° | 50° | — | — |
| 2023 | 54° | 37° | 45° | — | — |
| 2022 | 42° | 32° | 37° | 0.86" | — |
| 2021 | 39° | 36° | 37° | 0.2" | — |
| 2020 | 55° | 47° | 51° | 0.03" | — |
| 2019 | 54° | 47° | 50° | 6.71" | — |
| 2018 | 59° | 41° | 50° | 0.66" | — |
| 2017 | 45° | 31° | 38° | 0.13" | — |
| 2016 | 51° | 40° | 45° | — | — |
| 2015 | 48° | 41° | 45° | 0.3" | — |
| 2014 | 57° | 45° | 51° | 1.24" | — |
| 2013 | 43° | 31° | 37° | 0.46" | — |
| 2012 | 48° | 33° | 41° | 1.32" | — |
| 2011 | 45° | 37° | 41° | — | — |
| 2010 | 45° | 37° | 41° | 0.1" | — |
| 2009 | 54° | 45° | 49° | 0.28" | — |
| 2008 | 27° | 15° | 21° | 0.38" | — |
| 2007 | 45° | 33° | 39° | 0.25" | — |
| 2006 | 48° | 36° | 42° | 0.76" | — |
| 2005 | 54° | 47° | 50° | 0.81" | — |
| 2004 | 47° | 33° | 40° | — | — |
| 2003 | 50° | 44° | 47° | 0.43" | — |
| 2002 | 52° | 42° | 47° | — | — |
| 2001 | 41° | 39° | 40° | 0.08" | — |
| 2000 | 45° | 32° | 38° | 0.1" | — |
| 1999 | 48° | 43° | 45° | — | — |
| 1998 | 27° | 15° | 21° | — | — |
| 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 | 49° | 44° | 46° | — | — |
| 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 | 46° | 35° | 41° | — | — |
| 1980 | 48° | 38° | 43° | 1.14" | — |
| 1979 | 53° | 43° | 48° | 0.23" | — |
| 1978 | 40° | 30° | 35° | 0.2" | — |
| 1977 | 52° | 35° | 43° | — | — |
| 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 RENTON MUNI AP