Weather on September 11
Portland, OR
55 Years of Data
Avg High
77°F
Avg Low
56°F
Warmest
2013
80°F avg
Coldest
1982
55°F avg
About This Date
September 11th in Portland, OR typically brings pleasant fall weather, with average highs around 77°F and lows near 56°F. Over 55 years of records, the warmest September 11th was in 2013 (80°F average), while the coldest was 1982 (55°F) — a 25°F range across recorded history. Rain or other precipitation has occurred on about 18% of September 11th dates historically, with the wettest September 11th recording 1.37" of rain. The last decade has been 2.5°F cooler on this date compared to 20-30 years ago.
The last decade has been 2.5°F cooler on this date compared to 20-30 years ago.
Planning for September 11th in Portland, OR? Great weather for outdoor activities.
Warming Trend
0.7°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 68° | 60° | 64° | — | — |
| 2024 | 69° | 54° | 61° | 1.37" | — |
| 2023 | 74° | 59° | 66° | — | — |
| 2022 | 77° | 63° | 70° | — | — |
| 2021 | 78° | 53° | 66° | — | — |
| 2020 | 65° | 55° | 60° | — | — |
| 2019 | 74° | 56° | 65° | — | — |
| 2018 | 66° | 56° | 61° | 0.18" | — |
| 2017 | 89° | 58° | 73° | — | — |
| 2016 | 71° | 52° | 61° | — | — |
| 2015 | 92° | 62° | 77° | — | — |
| 2014 | 74° | 60° | 67° | — | — |
| 2013warmest | 95° | 65° | 80° | — | — |
| 2012 | 70° | 48° | 59° | — | — |
| 2011 | 92° | 66° | 79° | — | — |
| 2010 | 72° | 51° | 61° | — | — |
| 2009 | 96° | 53° | 75° | — | — |
| 2008 | 90° | 57° | 73° | — | — |
| 2007 | 89° | 58° | 73° | — | — |
| 2006 | 83° | 56° | 69° | — | — |
| 2005 | 70° | 51° | 60° | — | — |
| 2004 | 72° | 61° | 66° | 0.33" | — |
| 2003 | 75° | 60° | 68° | — | — |
| 2002 | 85° | 59° | 72° | — | — |
| 2001 | 85° | 58° | 71° | — | — |
| 2000 | 76° | 50° | 63° | — | — |
| 1999 | 81° | 53° | 67° | — | — |
| 1998 | 80° | 59° | 70° | — | — |
| 1997 | 69° | 59° | 64° | 0.25" | — |
| 1996 | 82° | 59° | 71° | — | — |
| 1995 | 78° | 58° | 68° | — | — |
| 1994 | 66° | 51° | 59° | — | — |
| 1993 | 68° | 52° | 60° | — | — |
| 1992 | 74° | 58° | 66° | — | — |
| 1991 | 77° | 53° | 65° | — | — |
| 1990 | 72° | 58° | 65° | — | — |
| 1989 | 84° | 58° | 71° | — | — |
| 1988 | 80° | 50° | 65° | — | — |
| 1987 | 63° | 57° | 60° | 0.1" | — |
| 1986 | 69° | 47° | 58° | — | — |
| 1985 | 65° | 52° | 58° | — | — |
| 1984 | 67° | 50° | 58° | 0.66" | — |
| 1983 | 73° | 56° | 64° | — | — |
| 1982coldest | 59° | 50° | 55° | 0.61" | — |
| 1981 | 84° | 58° | 71° | — | — |
| 1980 | 77° | 53° | 65° | — | — |
| 1979 | 83° | 52° | 67° | — | — |
| 1978 | 67° | 54° | 60° | 1.24" | — |
| 1977 | 79° | 54° | 66° | — | — |
| 1976 | 68° | 54° | 61° | 0.2" | — |
| 1975 | 90° | 62° | 76° | — | — |
| 1974 | 75° | 53° | 64° | — | — |
| 1973 | 80° | 54° | 67° | — | — |
| 1972 | 75° | 50° | 63° | — | — |
| 1971 | 76° | 55° | 65° | 0.08" | — |
55 years of data from PORTLAND KGW-TV