Weather on August 31
Seattle, WA
55 Years of Data
Avg High
72°F
Avg Low
57°F
Warmest
2022
75°F avg
Coldest
1973
56°F avg
About This Date
August 31st in Seattle, WA typically brings pleasant summer weather, with average highs around 72°F and lows near 57°F. Over 54 years of records, the warmest August 31st was in 2022 (75°F average), while the coldest was 1973 (56°F) — a 19°F range across recorded history. Rain or other precipitation has occurred on about 26% of August 31st dates historically, with the wettest August 31st recording 1.04" of rain. The last decade has been 1.4°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.4°F warmer on this date compared to 20-30 years ago.
Planning for August 31st in Seattle, WA? Great weather for outdoor activities.
Warming Trend
0.7°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 76° | 58° | 67° | — | — |
| 2024 | 83° | 60° | 71° | — | — |
| 2023 | 68° | 59° | 64° | 0.03" | — |
| 2022warmest | 87° | 62° | 75° | — | — |
| 2021 | 67° | 54° | 60° | — | — |
| 2020 | 71° | 55° | 63° | — | — |
| 2019 | 78° | 63° | 70° | 0.03" | — |
| 2018 | 71° | 59° | 65° | — | — |
| 2017 | 74° | 62° | 68° | — | — |
| 2016 | 70° | 60° | 65° | 0.03" | — |
| 2015 | 68° | 64° | 66° | 0.13" | — |
| 2014 | 73° | 58° | 65° | — | — |
| 2013 | 79° | 60° | 69° | — | — |
| 2012 | 71° | 53° | 62° | — | — |
| 2011 | 69° | 54° | 61° | — | — |
| 2010 | 61° | 54° | 57° | 0.94" | — |
| 2009 | 73° | 57° | 65° | — | — |
| 2008 | 64° | 49° | 56° | — | — |
| 2007 | 70° | 58° | 64° | 0.05" | — |
| 2006 | 71° | 52° | 61° | — | — |
| 2005 | 74° | 59° | 66° | — | — |
| 2004 | 77° | 59° | 68° | — | — |
| 2003 | 78° | 59° | 69° | — | — |
| 2002 | 79° | 55° | 67° | — | — |
| 2001 | 74° | 60° | 67° | — | — |
| 2000 | 67° | 54° | 60° | — | — |
| 1999 | 65° | 49° | 57° | — | — |
| 1997 | 81° | 56° | 68° | — | — |
| 1996 | 75° | 59° | 67° | — | — |
| 1995 | 76° | 54° | 65° | — | — |
| 1994 | 80° | 56° | 68° | — | — |
| 1993 | 80° | 55° | 68° | — | — |
| 1992 | 77° | 57° | 67° | — | — |
| 1991 | 64° | 57° | 61° | 1.04" | — |
| 1990 | 73° | 59° | 66° | — | — |
| 1989 | 67° | 57° | 62° | — | — |
| 1988 | 75° | 52° | 63° | — | — |
| 1987 | 86° | 60° | 73° | — | — |
| 1986 | 71° | 59° | 65° | — | — |
| 1985 | 70° | 53° | 61° | — | — |
| 1984 | 71° | 57° | 64° | — | — |
| 1983 | 72° | 61° | 66° | 0.03" | — |
| 1982 | 71° | 56° | 63° | 0.05" | — |
| 1981 | 65° | 54° | 59° | 0.69" | — |
| 1980 | 66° | 55° | 61° | 0.03" | — |
| 1979 | 73° | 60° | 67° | — | — |
| 1978 | 67° | 60° | 63° | 0.84" | — |
| 1977 | 67° | 53° | 60° | — | — |
| 1976 | 74° | 56° | 65° | — | — |
| 1975 | 66° | 53° | 60° | — | — |
| 1974 | 70° | 59° | 64° | — | — |
| 1973coldest | 63° | 50° | 56° | 0.51" | — |
| 1972 | 75° | 57° | 66° | — | — |
| 1971 | 63° | 58° | 60° | 0.3" | — |
54 years of data from SEATTLE URBAN SITE