Weather on May 15
Seattle, WA
55 Years of Data
Avg High
66°F
Avg Low
49°F
Warmest
2023
76°F avg
Coldest
1999
46°F avg
About This Date
May 15th in Seattle, WA typically brings mild spring weather, with average highs around 66°F and lows near 49°F. Over 55 years of records, the warmest May 15th was in 2023 (76°F average), while the coldest was 1999 (46°F) — a 30°F range across recorded history. Rain or other precipitation has occurred on about 40% of May 15th dates historically, with the wettest May 15th recording 1.6" of rain. The last decade has been 4.2°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.2°F warmer on this date compared to 20-30 years ago.
Planning for May 15th in Seattle, WA? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Warming Trend
1.0°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 56° | 45° | 50° | 0.18" | — |
| 2024 | 76° | 54° | 65° | — | — |
| 2023warmest | 91° | 61° | 76° | 0.03" | — |
| 2022 | 60° | 52° | 56° | 1.19" | — |
| 2021 | 73° | 50° | 62° | — | — |
| 2020 | 69° | 52° | 60° | — | — |
| 2019 | 67° | 53° | 60° | 0.08" | — |
| 2018 | 69° | 54° | 61° | — | — |
| 2017 | 53° | 45° | 49° | 0.71" | — |
| 2016 | 57° | 54° | 55° | — | — |
| 2015 | 69° | 52° | 60° | 0.03" | — |
| 2014 | 81° | 58° | 69° | — | — |
| 2013 | 66° | 49° | 57° | 0.08" | — |
| 2012 | 75° | 50° | 63° | — | — |
| 2011 | 53° | 49° | 51° | 1.55" | — |
| 2010 | 73° | 51° | 62° | — | — |
| 2009 | 65° | 45° | 55° | — | — |
| 2008 | 68° | 53° | 61° | — | — |
| 2007 | 83° | 49° | 66° | — | — |
| 2006 | 76° | 53° | 64° | — | — |
| 2005 | 64° | 54° | 59° | 0.99" | — |
| 2004 | 61° | 49° | 55° | — | — |
| 2003 | 55° | 43° | 49° | — | — |
| 2002 | 62° | 42° | 52° | — | — |
| 2001 | 62° | 48° | 55° | 1.6" | — |
| 2000 | 76° | 54° | 65° | — | — |
| 1999coldest | 61° | 32° | 46° | 0.23" | — |
| 1998 | 59° | 46° | 53° | — | — |
| 1997 | 76° | 55° | 65° | — | — |
| 1996 | 58° | 48° | 53° | 0.03" | — |
| 1995 | 74° | 53° | 63° | — | — |
| 1994 | 58° | 50° | 54° | 0.08" | — |
| 1993 | 71° | 54° | 62° | — | — |
| 1992 | 68° | 49° | 58° | — | — |
| 1991 | 68° | 46° | 57° | 0.03" | — |
| 1990 | 58° | 46° | 52° | — | — |
| 1989 | 75° | 48° | 62° | — | — |
| 1988 | 73° | 51° | 62° | 0.28" | — |
| 1987 | 62° | 49° | 55° | — | — |
| 1986 | 62° | 42° | 52° | — | — |
| 1985 | 67° | 45° | 56° | — | — |
| 1984 | 61° | 49° | 55° | — | — |
| 1983 | 60° | 44° | 52° | 0.51" | — |
| 1982 | 67° | 45° | 56° | — | — |
| 1981 | 61° | 44° | 52° | — | — |
| 1980 | 60° | 48° | 54° | 0.33" | — |
| 1979 | 72° | 48° | 60° | — | — |
| 1978 | 59° | 48° | 54° | 0.41" | — |
| 1977 | 58° | 46° | 52° | — | — |
| 1976 | 72° | 48° | 60° | — | — |
| 1975 | 64° | 52° | 58° | 0.05" | — |
| 1974 | 54° | 43° | 48° | 0.03" | — |
| 1973 | 75° | 55° | 65° | — | — |
| 1972 | 58° | 52° | 55° | 0.03" | — |
| 1971 | 60° | 48° | 54° | 0.33" | — |
55 years of data from SEATTLE URBAN SITE