Weather on May 20
Seattle, WA
55 Years of Data
Avg High
65°F
Avg Low
50°F
Warmest
1978
67°F avg
Coldest
1971
51°F avg
About This Date
May 20th in Seattle, WA typically brings mild spring weather, with average highs around 65°F and lows near 50°F. Over 55 years of records, the warmest May 20th was in 1978 (67°F average), while the coldest was 1971 (51°F) — a 16°F range across recorded history. Rain or other precipitation has occurred on about 31% of May 20th dates historically, with the wettest May 20th recording 1.42" 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 May 20th in Seattle, WA? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 61° | 49° | 55° | — | — |
| 2024 | 67° | 47° | 57° | — | — |
| 2023 | 76° | 57° | 66° | — | — |
| 2022 | 61° | 42° | 51° | — | — |
| 2021 | 62° | 46° | 54° | — | — |
| 2020 | 60° | 52° | 56° | — | — |
| 2019 | 59° | 52° | 55° | — | — |
| 2018 | 67° | 55° | 61° | — | — |
| 2017 | 72° | 56° | 64° | — | — |
| 2016 | 66° | 51° | 59° | — | — |
| 2015 | 74° | 54° | 64° | — | — |
| 2014 | 72° | 54° | 63° | — | — |
| 2013 | 69° | 51° | 60° | — | — |
| 2012 | 59° | 54° | 56° | 0.41" | — |
| 2011 | 71° | 45° | 58° | — | — |
| 2010 | 56° | 46° | 51° | 0.33" | — |
| 2009 | 61° | 47° | 54° | — | — |
| 2008 | 63° | 49° | 56° | 0.48" | — |
| 2007 | 56° | 46° | 51° | 1.42" | — |
| 2006 | 67° | 53° | 60° | 0.03" | — |
| 2005 | 62° | 50° | 56° | 0.36" | — |
| 2004 | 67° | 54° | 60° | — | — |
| 2003 | 60° | 50° | 55° | 0.08" | — |
| 2002 | 63° | 51° | 57° | 0.15" | — |
| 2001 | 66° | 44° | 55° | — | — |
| 2000 | 64° | 55° | 60° | — | — |
| 1999 | 63° | 45° | 54° | — | — |
| 1998 | 69° | 51° | 60° | — | — |
| 1997 | 64° | 51° | 58° | 0.25" | — |
| 1996 | 60° | 46° | 53° | — | — |
| 1995 | 76° | 46° | 61° | — | — |
| 1994 | 61° | 52° | 56° | 0.15" | — |
| 1993 | 73° | 54° | 63° | 0.36" | — |
| 1992 | 61° | 48° | 54° | — | — |
| 1991 | 64° | 54° | 59° | — | — |
| 1990 | 61° | 49° | 55° | 0.1" | — |
| 1989 | 63° | 46° | 54° | — | — |
| 1988 | 68° | 46° | 57° | — | — |
| 1987 | 69° | 46° | 58° | — | — |
| 1986 | 61° | 50° | 55° | 0.05" | — |
| 1985 | 61° | 52° | 56° | — | — |
| 1984 | 62° | 48° | 55° | — | — |
| 1983 | 72° | 51° | 61° | — | — |
| 1982 | 67° | 48° | 57° | — | — |
| 1981 | 59° | 53° | 56° | 0.03" | — |
| 1980 | 58° | 51° | 54° | 0.43" | — |
| 1979 | 74° | 46° | 60° | — | — |
| 1978warmest | 81° | 53° | 67° | — | — |
| 1977 | 70° | 53° | 61° | — | — |
| 1976 | 64° | 50° | 57° | — | — |
| 1975 | 68° | 43° | 55° | — | — |
| 1974 | 64° | 47° | 55° | 0.05" | — |
| 1973 | 62° | 46° | 54° | — | — |
| 1972 | 79° | 51° | 65° | — | — |
| 1971coldest | 58° | 45° | 51° | 0.58" | — |
55 years of data from SEATTLE URBAN SITE