Weather on December 18
Renton, WA
55 Years of Data
Avg High
47°F
Avg Low
36°F
Warmest
1979
51°F avg
Coldest
1984
26°F avg
About This Date
December 18th 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 18th was in 1979 (51°F average), while the coldest was 1984 (26°F) — a 25°F range across recorded history. Rain or other precipitation has occurred on about 56% of December 18th dates historically, with the wettest December 18th recording 1.7" of rain. The last decade has been 3.1°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.1°F warmer on this date compared to 20-30 years ago.
Planning for December 18th in Renton, WA? Bring layers as temperatures can vary throughout the day. Consider bringing rain gear or an umbrella.
Warming Trend
0.8°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 53° | 43° | 48° | 0.81" | — |
| 2024 | 57° | 45° | 51° | 0.33" | — |
| 2023 | 51° | 38° | 44° | — | — |
| 2022 | 44° | 34° | 39° | — | — |
| 2021 | 52° | 37° | 44° | 0.86" | — |
| 2020 | 53° | 44° | 49° | 0.08" | — |
| 2019 | 47° | 38° | 42° | 0.15" | — |
| 2018 | 54° | 46° | 50° | 1.09" | — |
| 2017 | 51° | 43° | 47° | 1.4" | — |
| 2016 | 39° | 28° | 34° | — | — |
| 2015 | 47° | 40° | 43° | 1.42" | — |
| 2014 | 50° | 44° | 47° | 1.14" | — |
| 2013 | 45° | 34° | 39° | 0.15" | — |
| 2012 | 42° | 35° | 39° | 0.3" | — |
| 2011 | 46° | 35° | 41° | — | — |
| 2010 | 48° | 35° | 42° | 0.15" | — |
| 2009 | 54° | 42° | 48° | 0.03" | — |
| 2008 | 35° | 24° | 30° | 0.41" | — |
| 2007 | 48° | 39° | 44° | 1.14" | — |
| 2006 | 40° | 28° | 34° | — | — |
| 2005 | 47° | 31° | 39° | — | — |
| 2004 | 53° | 41° | 47° | — | — |
| 2003 | 58° | 38° | 48° | — | — |
| 2002 | 47° | 37° | 42° | 0.3" | — |
| 2001 | 46° | 39° | 43° | 0.38" | — |
| 2000 | 45° | 32° | 38° | — | — |
| 1999 | 51° | 44° | 48° | — | — |
| 1998 | 43° | 29° | 36° | — | — |
| 1997 | 46° | 35° | 41° | — | — |
| 1996 | 42° | 29° | 35° | — | — |
| 1995 | 47° | 42° | 44° | 1.37" | — |
| 1994 | 53° | 45° | 49° | 0.64" | — |
| 1993 | 36° | 26° | 31° | — | — |
| 1992 | 38° | 25° | 31° | — | — |
| 1991 | 46° | 35° | 41° | 0.91" | — |
| 1990 | 51° | 33° | 42° | — | — |
| 1989 | 45° | 40° | 42° | — | — |
| 1988 | 43° | 24° | 33° | 0.05" | — |
| 1987 | 39° | 29° | 34° | 0.05" | — |
| 1986 | 45° | 26° | 35° | 0.13" | — |
| 1985 | 42° | 30° | 36° | — | — |
| 1984coldest | 34° | 18° | 26° | — | — |
| 1983 | 37° | 29° | 33° | 0.08" | — |
| 1982 | 50° | 34° | 42° | 0.41" | — |
| 1981 | 49° | 42° | 45° | 1.47" | — |
| 1980 | 47° | 41° | 44° | — | — |
| 1979warmest | 54° | 48° | 51° | 1.7" | — |
| 1978 | 43° | 33° | 38° | — | — |
| 1977 | 43° | 38° | 40° | 0.25" | — |
| 1976 | 51° | 37° | 44° | — | — |
| 1975 | 39° | 29° | 34° | — | — |
| 1974 | 53° | 41° | 47° | 0.97" | — |
| 1973 | 50° | 41° | 46° | — | — |
| 1972 | 51° | 39° | 45° | 1.4" | — |
| 1971 | 50° | 37° | 44° | 0.86" | — |
55 years of data from RENTON MUNI AP