Weather on April 21
Seattle, WA
55 Years of Data
Avg High
60°F
Avg Low
44°F
Warmest
2016
62°F avg
Coldest
2008
43°F avg
About This Date
April 21st in Seattle, WA typically brings mild spring weather, with average highs around 60°F and lows near 44°F. Over 55 years of records, the warmest April 21st was in 2016 (62°F average), while the coldest was 2008 (43°F) — a 19°F range across recorded history. Rain or other precipitation has occurred on about 44% of April 21st dates historically, with the wettest April 21st recording 2.16" of rain. The last decade has been 1.0°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.0°F warmer on this date compared to 20-30 years ago.
Planning for April 21st in Seattle, WA? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Warming Trend
0.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 58° | 43° | 50° | — | — |
| 2024 | 59° | 43° | 51° | — | — |
| 2023 | 53° | 44° | 49° | — | — |
| 2022 | 57° | 41° | 49° | 0.28" | — |
| 2021 | 71° | 46° | 59° | — | — |
| 2020 | 58° | 49° | 53° | — | — |
| 2019 | 61° | 45° | 53° | — | — |
| 2018 | 58° | 46° | 52° | 0.2" | — |
| 2017 | 66° | 43° | 54° | — | — |
| 2016warmest | 73° | 52° | 62° | — | — |
| 2015 | 65° | 46° | 55° | 0.41" | — |
| 2014 | 64° | 48° | 56° | 0.43" | — |
| 2013 | 56° | 46° | 51° | 0.08" | — |
| 2012 | 68° | 42° | 55° | — | — |
| 2011 | 54° | 37° | 45° | 0.1" | — |
| 2010 | 52° | 44° | 48° | 2.16" | — |
| 2009 | 70° | 49° | 59° | — | — |
| 2008coldest | 51° | 35° | 43° | 0.03" | — |
| 2007 | 59° | 41° | 50° | 0.18" | — |
| 2006 | 55° | 43° | 49° | 0.56" | — |
| 2005 | 64° | 48° | 56° | — | — |
| 2004 | 61° | 46° | 53° | — | — |
| 2003 | 53° | 50° | 52° | 0.36" | — |
| 2002 | 51° | 43° | 47° | 0.3" | — |
| 2001 | 63° | 39° | 51° | — | — |
| 2000 | 66° | 46° | 56° | 0.25" | — |
| 1999 | 55° | 40° | 47° | — | — |
| 1998 | 66° | 51° | 59° | — | — |
| 1997 | 60° | 40° | 50° | — | — |
| 1996 | 63° | 40° | 51° | — | — |
| 1995 | 62° | 45° | 53° | — | — |
| 1994 | 62° | 48° | 55° | 0.1" | — |
| 1993 | 62° | 47° | 54° | 0.51" | — |
| 1992 | 58° | 44° | 51° | 0.25" | — |
| 1991 | 64° | 48° | 56° | — | — |
| 1990 | 61° | 48° | 54° | — | — |
| 1989 | 60° | 44° | 52° | — | — |
| 1988 | 55° | 46° | 51° | 0.18" | — |
| 1987 | 62° | 44° | 53° | — | — |
| 1986 | 58° | 48° | 53° | 0.15" | — |
| 1985 | 55° | 33° | 44° | — | — |
| 1984 | 60° | 45° | 52° | 0.03" | — |
| 1983 | 63° | 47° | 55° | — | — |
| 1982 | 73° | 39° | 56° | — | — |
| 1981 | 59° | 48° | 54° | — | — |
| 1980 | 60° | 43° | 51° | — | — |
| 1979 | 61° | 41° | 51° | — | — |
| 1978 | 52° | 40° | 46° | 0.08" | — |
| 1977 | 61° | 46° | 53° | 0.2" | — |
| 1976 | 53° | 38° | 45° | — | — |
| 1975 | 58° | 38° | 48° | — | — |
| 1974 | 57° | 43° | 50° | 0.05" | — |
| 1973 | 65° | 40° | 52° | — | — |
| 1972 | 52° | 42° | 47° | 0.1" | — |
| 1971 | 55° | 41° | 48° | 0.05" | — |
55 years of data from SEATTLE URBAN SITE