Weather on August 15
Bellevue, WA
55 Years of Data
Avg High
77°F
Avg Low
57°F
Warmest
2023
80°F avg
Coldest
1978
58°F avg
About This Date
August 15th in Bellevue, WA typically brings pleasant summer weather, with average highs around 77°F and lows near 57°F. Over 54 years of records, the warmest August 15th was in 2023 (80°F average), while the coldest was 1978 (58°F) — a 22°F range across recorded history. Rain or other precipitation has occurred on about 20% of August 15th dates historically, with the wettest August 15th recording 1.17" of rain. The last decade has been 3.3°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.3°F warmer on this date compared to 20-30 years ago.
Planning for August 15th in Bellevue, WA? Great weather for outdoor activities.
Warming Trend
1.1°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 70° | 63° | 66° | 1.17" | — |
| 2024 | 78° | 58° | 68° | — | — |
| 2023warmest | 94° | 66° | 80° | — | — |
| 2022 | 84° | 56° | 70° | — | — |
| 2021 | 83° | 60° | 71° | — | — |
| 2020 | 85° | 59° | 72° | — | — |
| 2019 | 80° | 60° | 70° | — | — |
| 2018 | 84° | 58° | 71° | — | — |
| 2017 | 78° | 53° | 66° | — | — |
| 2016 | 82° | 61° | 71° | — | — |
| 2015 | 70° | 59° | 64° | 0.15" | — |
| 2014 | 73° | 64° | 69° | 0.3" | — |
| 2013 | 70° | 61° | 65° | 0.13" | — |
| 2012 | 85° | 60° | 72° | — | — |
| 2011 | 76° | 57° | 66° | 0.03" | — |
| 2010 | 91° | 65° | 78° | — | — |
| 2009 | 70° | 51° | 60° | — | — |
| 2008 | 92° | 63° | 77° | — | — |
| 2007 | 84° | 55° | 70° | — | — |
| 2006 | 73° | 55° | 64° | — | — |
| 2005 | 87° | 61° | 74° | — | — |
| 2004 | 81° | 61° | 71° | — | — |
| 2003 | 79° | 58° | 68° | — | — |
| 2002 | 83° | 57° | 70° | — | — |
| 2001 | 77° | 55° | 66° | — | — |
| 2000 | 70° | 52° | 61° | — | — |
| 1999 | 62° | 55° | 59° | 0.64" | — |
| 1997 | 78° | 61° | 69° | — | — |
| 1996 | 79° | 56° | 67° | — | — |
| 1995 | 66° | 54° | 60° | — | — |
| 1994 | 76° | 61° | 68° | — | — |
| 1993 | 67° | 59° | 63° | — | — |
| 1992 | 80° | 58° | 69° | — | — |
| 1991 | 83° | 61° | 72° | — | — |
| 1990 | 77° | 58° | 67° | — | — |
| 1989 | 71° | 56° | 63° | 0.69" | — |
| 1988 | 66° | 56° | 61° | 0.18" | — |
| 1987 | 65° | 57° | 61° | — | — |
| 1986 | 77° | 58° | 67° | — | — |
| 1985 | 82° | 57° | 70° | — | — |
| 1984 | 81° | 56° | 68° | — | — |
| 1983 | 74° | 58° | 66° | — | — |
| 1982 | 77° | 49° | 63° | — | — |
| 1981 | 88° | 58° | 73° | — | — |
| 1980 | 72° | 53° | 62° | — | — |
| 1979 | 79° | 57° | 68° | — | — |
| 1978coldest | 64° | 52° | 58° | 0.38" | — |
| 1977 | 85° | 57° | 71° | — | — |
| 1976 | 74° | 56° | 65° | 0.56" | — |
| 1975 | 85° | 56° | 70° | — | — |
| 1974 | 70° | 52° | 61° | — | — |
| 1973 | 68° | 53° | 61° | — | — |
| 1972 | 78° | 56° | 67° | 0.08" | — |
| 1971 | 76° | 56° | 66° | — | — |
54 years of data from SEATTLE UNIV OF WASHIN