Weather on August 15
Portland, OR
55 Years of Data
Avg High
81°F
Avg Low
59°F
Warmest
2023
87°F avg
Coldest
1976
59°F avg
About This Date
August 15th in Portland, OR typically brings warm summer weather, with average highs around 81°F and lows near 59°F. Over 55 years of records, the warmest August 15th was in 2023 (87°F average), while the coldest was 1976 (59°F) — a 28°F range across recorded history. Rain or other precipitation has occurred on about 9% of August 15th dates historically, with the wettest August 15th recording 2.08" of rain. The last decade has been 5.4°F warmer on this date compared to 20-30 years ago.
The last decade has been 5.4°F warmer on this date compared to 20-30 years ago.
Planning for August 15th in Portland, OR? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
1.8°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 75° | 63° | 69° | — | — |
| 2024 | 75° | 62° | 69° | — | — |
| 2023warmest | 101° | 74° | 87° | — | — |
| 2022 | 86° | 59° | 73° | — | — |
| 2021 | 93° | 64° | 79° | — | — |
| 2020 | 99° | 68° | 83° | — | — |
| 2019 | 80° | 59° | 70° | — | — |
| 2018 | 87° | 64° | 76° | — | — |
| 2017 | 80° | 54° | 67° | — | — |
| 2016 | 86° | 59° | 73° | — | — |
| 2015 | 74° | 62° | 68° | — | — |
| 2014 | 78° | 65° | 71° | — | — |
| 2013 | 80° | 66° | 73° | — | — |
| 2012 | 92° | 61° | 76° | — | — |
| 2011 | 76° | 57° | 66° | — | — |
| 2010 | 96° | 64° | 80° | — | — |
| 2009 | 68° | 54° | 61° | — | — |
| 2008 | 100° | 71° | 86° | — | — |
| 2007 | 87° | 60° | 74° | — | — |
| 2006 | 74° | 54° | 64° | — | — |
| 2005 | 89° | 62° | 76° | — | — |
| 2004 | 85° | 62° | 73° | — | — |
| 2003 | 79° | 62° | 70° | — | — |
| 2002 | 89° | 56° | 72° | — | — |
| 2001 | 80° | 56° | 68° | — | — |
| 2000 | 74° | 52° | 63° | — | — |
| 1999 | 75° | 55° | 65° | — | — |
| 1998 | 74° | 63° | 68° | — | — |
| 1997 | 77° | 60° | 69° | — | — |
| 1996 | 82° | 54° | 68° | — | — |
| 1995 | 69° | 58° | 63° | 0.03" | — |
| 1994 | 78° | 56° | 67° | — | — |
| 1993 | 70° | 57° | 63° | 0.03" | — |
| 1992 | 87° | 58° | 72° | — | — |
| 1991 | 90° | 64° | 77° | — | — |
| 1990 | 72° | 60° | 66° | — | — |
| 1989 | 71° | 52° | 61° | — | — |
| 1988 | 67° | 55° | 61° | — | — |
| 1987 | 71° | 58° | 64° | — | — |
| 1986 | 83° | 61° | 72° | — | — |
| 1985 | 83° | 57° | 70° | — | — |
| 1984 | 84° | 55° | 70° | — | — |
| 1983 | 79° | 55° | 67° | — | — |
| 1982 | 77° | 50° | 64° | — | — |
| 1981 | 82° | 59° | 71° | — | — |
| 1980 | 71° | 53° | 62° | — | — |
| 1979 | 83° | 56° | 69° | 0.74" | — |
| 1978 | 73° | 61° | 67° | 1.45" | — |
| 1977 | 93° | 60° | 77° | — | — |
| 1976coldest | 64° | 53° | 59° | 2.08" | — |
| 1975 | 81° | 55° | 68° | — | — |
| 1974 | 81° | 54° | 67° | — | — |
| 1973 | 75° | 51° | 63° | — | — |
| 1972 | 70° | 57° | 63° | — | — |
| 1971 | 85° | 58° | 71° | — | — |
55 years of data from PORTLAND KGW-TV