Weather on September 17
Portland, OR
55 Years of Data
Avg High
72°F
Avg Low
54°F
Warmest
1991
76°F avg
Coldest
1978
53°F avg
About This Date
September 17th in Portland, OR typically brings pleasant fall weather, with average highs around 72°F and lows near 54°F. Over 55 years of records, the warmest September 17th was in 1991 (76°F average), while the coldest was 1978 (53°F) — a 23°F range across recorded history. Rain or other precipitation has occurred on about 33% of September 17th dates historically, with the wettest September 17th recording 1.7" of rain. Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for September 17th in Portland, OR? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 80° | 59° | 70° | — | — |
| 2024 | 63° | 52° | 57° | 0.05" | — |
| 2023 | 73° | 55° | 64° | — | — |
| 2022 | 69° | 52° | 60° | — | — |
| 2021 | 75° | 55° | 65° | — | — |
| 2020 | 72° | 57° | 64° | — | — |
| 2019 | 68° | 55° | 62° | 0.91" | — |
| 2018 | 67° | 49° | 58° | — | — |
| 2017 | 64° | 55° | 60° | 0.2" | — |
| 2016 | 67° | 56° | 61° | 1.7" | — |
| 2015 | 69° | 55° | 62° | 0.64" | — |
| 2014 | 76° | 55° | 65° | — | — |
| 2013 | 68° | 55° | 62° | — | — |
| 2012 | 90° | 57° | 73° | — | — |
| 2011 | 58° | 52° | 55° | 0.3" | — |
| 2010 | 71° | 59° | 65° | 0.3" | — |
| 2009 | 73° | 55° | 64° | — | — |
| 2008 | 82° | 57° | 70° | — | — |
| 2007 | 66° | 56° | 61° | 0.05" | — |
| 2006 | 74° | 52° | 63° | — | — |
| 2005 | 72° | 49° | 60° | — | — |
| 2004 | 62° | 53° | 58° | 1.32" | — |
| 2003 | 74° | 49° | 61° | — | — |
| 2002 | 69° | 52° | 60° | 0.23" | — |
| 2001 | 70° | 54° | 62° | — | — |
| 2000 | 75° | 55° | 65° | — | — |
| 1999 | 76° | 51° | 63° | — | — |
| 1998 | 74° | 55° | 64° | 0.2" | — |
| 1997 | 65° | 55° | 60° | 0.64" | — |
| 1996 | 68° | 53° | 61° | — | — |
| 1995 | 68° | 60° | 64° | — | — |
| 1994 | 85° | 61° | 73° | — | — |
| 1993 | 76° | 52° | 64° | — | — |
| 1992 | 74° | 49° | 61° | — | — |
| 1991warmest | 91° | 61° | 76° | — | — |
| 1990 | 74° | 56° | 65° | — | — |
| 1989 | 67° | 52° | 59° | 0.05" | — |
| 1988 | 68° | 49° | 58° | — | — |
| 1987 | 78° | 49° | 63° | — | — |
| 1986 | 56° | 52° | 54° | 1.09" | — |
| 1985 | 61° | 49° | 55° | 1.45" | — |
| 1984 | 83° | 57° | 70° | — | — |
| 1983 | 67° | 46° | 56° | — | — |
| 1982 | 85° | 52° | 68° | — | — |
| 1981 | 78° | 55° | 67° | — | — |
| 1980 | 78° | 54° | 66° | — | — |
| 1979 | 87° | 50° | 69° | — | — |
| 1978coldest | 59° | 47° | 53° | 0.58" | — |
| 1977 | 67° | 54° | 60° | 0.23" | — |
| 1976 | 65° | 57° | 61° | — | — |
| 1975 | 68° | 53° | 61° | — | — |
| 1974 | 84° | 55° | 70° | — | — |
| 1973 | 70° | 55° | 62° | 0.05" | — |
| 1972 | 71° | 53° | 62° | — | — |
| 1971 | 76° | 61° | 68° | — | — |
55 years of data from PORTLAND KGW-TV