Weather on August 31
Seattle, WA
55 Years of Data
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 55 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 25% of August 31st dates historically. The last decade has been 1.3°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.3°F warmer on this date compared to 20-30 years ago.
Planning for August 31st in Seattle, WA? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 75° | 58° | 66° | — | — |
| 2025 | 76° | 58° | 67° | — | — |
| 2024 | 83° | 60° | 71° | — | — |
| 2023 | 68° | 59° | 64° | 0.01" | — |
| 2022warmest | 87° | 62° | 75° | — | — |
| 2021 | 67° | 54° | 60° | — | — |
| 2020 | 71° | 55° | 63° | — | — |
| 2019 | 78° | 63° | 70° | 0.01" | — |
| 2018 | 71° | 59° | 65° | — | — |
| 2017 | 74° | 62° | 68° | — | — |
| 2016 | 70° | 60° | 65° | 0.01" | — |
| 2015 | 68° | 64° | 66° | 0.05" | — |
| 2014 | 73° | 58° | 65° | — | — |
| 2013 | 79° | 60° | 69° | — | — |
| 2012 | 71° | 53° | 62° | — | — |
| 2011 | 69° | 54° | 61° | — | — |
| 2010 | 61° | 54° | 57° | 0.37" | — |
| 2009 | 73° | 57° | 65° | — | — |
| 2008 | 64° | 49° | 56° | — | — |
| 2007 | 70° | 58° | 64° | 0.02" | — |
| 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° | 0.41" | — |
| 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° | 0.01" | — |
| 1982 | 71° | 56° | 63° | 0.02" | — |
| 1981 | 65° | 54° | 59° | 0.27" | — |
| 1980 | 66° | 55° | 61° | 0.01" | — |
| 1979 | 73° | 60° | 67° | — | — |
| 1978 | 67° | 60° | 63° | 0.33" | — |
| 1977 | 67° | 53° | 60° | — | — |
| 1976 | 74° | 56° | 65° | — | — |
| 1975 | 66° | 53° | 60° | — | — |
| 1974 | 70° | 59° | 64° | — | — |
| 1973coldest | 63° | 50° | 56° | 0.2" | — |
| 1972 | 75° | 57° | 66° | — | — |
| 1971 | 63° | 58° | 60° | 0.12" | — |
Seattle, WA Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Seattle, WA Monthly Precipitation
Average rainfall and snowfall per month, in inches.
Seattle, WA Daily Temperature Calendar
Average daily high temperature for every day of the year. Each cell is the climatological mean for that calendar day across 55 years of NOAA data.
Best Time to Visit Seattle, WA
Most pleasant months in Seattle, WA: May, June, July, August, September.
What to expect on August 31st
This page shows what actually happened each year. For the odds — typical high and low, and how often it stays dry — see the climatological outlook for this date.
August 31st outlook →