Weather on December 15
Renton, WA
55 Years of Data
Avg High
47°F
Avg Low
36°F
Warmest
2025
54°F avg
Coldest
2008
26°F avg
About This Date
December 15th in Renton, 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 15th was in 2025 (54°F average), while the coldest was 2008 (26°F) — a 28°F range across recorded history. Rain or other precipitation has occurred on about 65% of December 15th dates historically, with the wettest December 15th recording 4.32" 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 15th 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 |
|---|---|---|---|---|---|
| 2025warmest | 60° | 49° | 54° | 2.39" | — |
| 2024 | 49° | 40° | 44° | — | — |
| 2023 | 53° | 39° | 46° | — | — |
| 2022 | 43° | 29° | 36° | — | — |
| 2021 | 44° | 37° | 41° | — | — |
| 2020 | 49° | 42° | 45° | 0.15" | — |
| 2019 | 44° | 36° | 40° | 0.38" | — |
| 2018 | 52° | 42° | 47° | 0.03" | — |
| 2017 | 45° | 37° | 41° | 0.08" | — |
| 2016 | 38° | 33° | 35° | — | — |
| 2015 | 44° | 33° | 39° | 0.15" | — |
| 2014 | 55° | 47° | 51° | — | — |
| 2013 | 53° | 46° | 50° | 0.2" | — |
| 2012 | 43° | 33° | 38° | 0.33" | — |
| 2011 | 44° | 38° | 41° | 0.03" | — |
| 2010 | 48° | 39° | 44° | 0.15" | — |
| 2009 | 46° | 38° | 42° | 0.66" | — |
| 2008coldest | 33° | 19° | 26° | — | — |
| 2007 | 47° | 41° | 44° | 0.41" | — |
| 2006 | 49° | 35° | 42° | 0.13" | — |
| 2005 | 39° | 25° | 32° | — | — |
| 2004 | 52° | 43° | 47° | — | — |
| 2003 | 47° | 39° | 43° | — | — |
| 2002 | 53° | 44° | 49° | 0.84" | — |
| 2001 | 50° | 38° | 44° | 1.22" | — |
| 2000 | 44° | 36° | 40° | — | — |
| 1999 | 55° | 50° | 53° | 2.49" | — |
| 1998 | 50° | 40° | 45° | 0.03" | — |
| 1997 | 47° | 38° | 42° | 0.41" | — |
| 1996 | 46° | 33° | 40° | — | — |
| 1995 | 52° | 39° | 45° | 0.05" | — |
| 1994 | 46° | 37° | 42° | 0.48" | — |
| 1993 | 46° | 40° | 43° | — | — |
| 1992 | 43° | 29° | 36° | — | — |
| 1991 | 39° | 25° | 32° | — | — |
| 1990 | 44° | 36° | 40° | 0.58" | — |
| 1989 | 42° | 32° | 37° | — | — |
| 1988 | 43° | 25° | 34° | 0.03" | — |
| 1987 | 38° | 26° | 32° | 0.05" | — |
| 1986 | 52° | 35° | 43° | 0.03" | — |
| 1985 | 47° | 31° | 39° | — | — |
| 1984 | 43° | 25° | 34° | — | — |
| 1983 | 46° | 34° | 40° | 0.05" | — |
| 1982 | 51° | 39° | 45° | 0.69" | — |
| 1981 | 46° | 42° | 44° | 1.85" | — |
| 1980 | 61° | 45° | 53° | 0.05" | — |
| 1979 | 52° | 32° | 42° | 4.32" | — |
| 1978 | 46° | 31° | 38° | — | — |
| 1977 | 49° | 40° | 44° | 2.74" | — |
| 1976 | 60° | 41° | 51° | 0.13" | — |
| 1975 | 46° | 41° | 44° | 0.33" | — |
| 1974 | 51° | 39° | 45° | 0.48" | — |
| 1973 | 49° | 42° | 45° | 2.79" | — |
| 1972 | 39° | 21° | 30° | 0.13" | — |
| 1971 | 43° | 34° | 38° | 0.2" | — |
55 years of data from RENTON MUNI AP