Weather on March 21
Renton, WA
55 Years of Data
Avg High
56°F
Avg Low
39°F
Warmest
2004
55°F avg
Coldest
1971
40°F avg
About This Date
March 21st in Renton, WA typically brings cool spring weather, with average highs around 56°F and lows near 39°F. Over 56 years of records, the warmest March 21st was in 2004 (55°F average), while the coldest was 1971 (40°F) — a 15°F range across recorded history. Rain or other precipitation has occurred on about 50% of March 21st dates historically, with the wettest March 21st recording 1.78" 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 March 21st in Renton, WA? Bring layers as temperatures can vary throughout the day. Consider bringing rain gear or an umbrella.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 53° | 42° | 48° | — | — |
| 2025 | 53° | 42° | 48° | 0.3" | — |
| 2024 | 59° | 47° | 53° | 0.28" | — |
| 2023 | 57° | 46° | 52° | — | — |
| 2022 | 52° | 42° | 47° | 0.03" | — |
| 2021 | 46° | 42° | 44° | — | — |
| 2020 | 55° | 39° | 47° | — | — |
| 2019 | 62° | 45° | 53° | — | — |
| 2018 | 59° | 34° | 46° | 0.1" | — |
| 2017 | 56° | 45° | 50° | 0.46" | — |
| 2016 | 58° | 49° | 53° | 0.74" | — |
| 2015 | 58° | 47° | 52° | 0.36" | — |
| 2014 | 51° | 34° | 42° | — | — |
| 2013 | 48° | 35° | 42° | 0.33" | — |
| 2012 | 49° | 34° | 41° | 0.15" | — |
| 2011 | 51° | 43° | 47° | 0.03" | — |
| 2010 | 56° | 47° | 51° | 0.08" | — |
| 2009 | 51° | 32° | 42° | — | — |
| 2008 | 50° | 37° | 44° | — | — |
| 2007 | 51° | 33° | 42° | — | — |
| 2006 | 53° | 43° | 48° | 0.08" | — |
| 2005 | 51° | 39° | 45° | 0.13" | — |
| 2004warmest | 68° | 41° | 55° | — | — |
| 2003 | 52° | 45° | 48° | 1.78" | — |
| 2002 | 53° | 35° | 44° | — | — |
| 2001 | 54° | 41° | 47° | — | — |
| 2000 | 58° | 45° | 51° | — | — |
| 1999 | 59° | 46° | 53° | 0.33" | — |
| 1998 | 66° | 40° | 53° | — | — |
| 1997 | 57° | 34° | 45° | — | — |
| 1996 | 58° | 38° | 48° | — | — |
| 1995 | 52° | 40° | 46° | 0.08" | — |
| 1994 | 46° | 35° | 41° | 0.66" | — |
| 1993 | 61° | 46° | 53° | 0.05" | — |
| 1992 | 68° | 35° | 52° | — | — |
| 1991 | 59° | 35° | 47° | 0.51" | — |
| 1990 | 60° | 40° | 50° | — | — |
| 1989 | 50° | 43° | 46° | 0.61" | — |
| 1988 | 54° | 38° | 46° | 0.51" | — |
| 1987 | 62° | 33° | 48° | — | — |
| 1986 | 56° | 38° | 47° | 0.43" | — |
| 1985 | 51° | 36° | 43° | 0.25" | — |
| 1984 | 54° | 43° | 48° | 1.4" | — |
| 1983 | 58° | 42° | 50° | — | — |
| 1982 | 57° | 27° | 42° | — | — |
| 1981 | 67° | 33° | 50° | — | — |
| 1980 | 51° | 42° | 47° | — | — |
| 1979 | 61° | 37° | 49° | — | — |
| 1978 | 64° | 41° | 53° | — | — |
| 1977 | 53° | 45° | 49° | 0.13" | — |
| 1976 | 60° | 30° | 45° | — | — |
| 1975 | 50° | 36° | 43° | 0.03" | — |
| 1974 | 59° | 30° | 45° | — | — |
| 1973 | 56° | 39° | 47° | 0.05" | — |
| 1972 | 56° | 43° | 49° | 0.25" | — |
| 1971coldest | 52° | 28° | 40° | — | — |
56 years of data from RENTON MUNI AP