Weather on October 21
Seattle, WA
55 Years of Data
Avg High
59°F
Avg Low
46°F
Warmest
2003
62°F avg
Coldest
2012
45°F avg
About This Date
October 21st in Seattle, WA typically brings cool fall weather, with average highs around 59°F and lows near 46°F. Over 54 years of records, the warmest October 21st was in 2003 (62°F average), while the coldest was 2012 (45°F) — a 17°F range across recorded history. Rain or other precipitation has occurred on about 57% of October 21st dates historically, with the wettest October 21st recording 2.11" 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 October 21st in Seattle, WA? Bring layers as temperatures can vary throughout the day. Consider bringing rain gear or an umbrella.
Warming Trend
0.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 61° | 43° | 52° | — | — |
| 2024 | 57° | 49° | 53° | 0.28" | — |
| 2023 | 56° | 52° | 54° | — | — |
| 2022 | 54° | 47° | 50° | 0.56" | — |
| 2021 | 69° | 46° | 58° | 1.04" | — |
| 2020 | 55° | 41° | 48° | 0.56" | — |
| 2019 | 61° | 53° | 57° | 0.1" | — |
| 2018 | 57° | 43° | 50° | — | — |
| 2017 | 59° | 46° | 53° | 0.48" | — |
| 2016 | 59° | 48° | 54° | 0.03" | — |
| 2015 | 65° | 49° | 57° | — | — |
| 2014 | 64° | 55° | 60° | 0.25" | — |
| 2013 | 54° | 48° | 51° | — | — |
| 2012coldest | 54° | 37° | 45° | 0.36" | — |
| 2011 | 60° | 50° | 55° | 0.05" | — |
| 2010 | 61° | 45° | 53° | 0.05" | — |
| 2009 | 64° | 52° | 58° | 0.38" | — |
| 2008 | 56° | 39° | 47° | — | — |
| 2007 | 55° | 49° | 52° | 0.18" | — |
| 2006 | 63° | 44° | 53° | — | — |
| 2005 | 68° | 50° | 59° | — | — |
| 2004 | 54° | 48° | 51° | 0.03" | — |
| 2003warmest | 66° | 58° | 62° | 0.64" | — |
| 2002 | 59° | 54° | 56° | — | — |
| 2001 | 54° | 45° | 49° | 0.74" | — |
| 2000 | 57° | 42° | 50° | — | — |
| 1999 | 64° | 43° | 53° | 0.03" | — |
| 1997 | 53° | 41° | 47° | — | — |
| 1996 | 51° | 42° | 47° | 1.4" | — |
| 1995 | 59° | 44° | 52° | 0.3" | — |
| 1994 | 63° | 48° | 55° | — | — |
| 1993 | 64° | 47° | 55° | — | — |
| 1992 | 62° | 50° | 56° | — | — |
| 1991 | 59° | 48° | 54° | 0.99" | — |
| 1990 | 54° | 48° | 51° | 1.24" | — |
| 1989 | 59° | 48° | 54° | 0.61" | — |
| 1988 | 60° | 53° | 57° | 0.15" | — |
| 1987 | 63° | 42° | 52° | — | — |
| 1986 | 59° | 48° | 54° | — | — |
| 1985 | 56° | 48° | 52° | 0.3" | — |
| 1984 | 53° | 39° | 46° | — | — |
| 1983 | 64° | 52° | 58° | 0.58" | — |
| 1982 | 56° | 48° | 52° | 2.06" | — |
| 1981 | 61° | 39° | 50° | — | — |
| 1980 | 60° | 42° | 51° | — | — |
| 1979 | 59° | 42° | 51° | — | — |
| 1978 | 57° | 44° | 51° | 0.05" | — |
| 1977 | 61° | 48° | 54° | 0.18" | — |
| 1976 | 55° | 41° | 48° | — | — |
| 1975 | 50° | 45° | 47° | 2.11" | — |
| 1974 | 56° | 44° | 50° | — | — |
| 1973 | 58° | 50° | 54° | 0.33" | — |
| 1972 | 54° | 49° | 51° | 0.05" | — |
| 1971 | 54° | 43° | 48° | — | — |
54 years of data from SEATTLE URBAN SITE