Weather on September 12
Portland, OR
55 Years of Data
Avg High
76°F
Avg Low
56°F
Warmest
2015
77°F avg
Coldest
2020
57°F avg
About This Date
September 12th in Portland, OR typically brings pleasant fall weather, with average highs around 76°F and lows near 56°F. Over 55 years of records, the warmest September 12th was in 2015 (77°F average), while the coldest was 2020 (57°F) — a 20°F range across recorded history. Rain or other precipitation has occurred on about 11% of September 12th dates historically, with the wettest September 12th recording 1.14" of rain. The last decade has been 1.9°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.9°F cooler on this date compared to 20-30 years ago.
Planning for September 12th in Portland, OR? Great weather for outdoor activities.
Warming Trend
0.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 71° | 59° | 65° | — | — |
| 2024 | 68° | 57° | 63° | — | — |
| 2023 | 77° | 56° | 66° | — | — |
| 2022 | 73° | 61° | 67° | 0.08" | — |
| 2021 | 72° | 60° | 66° | — | — |
| 2020coldest | 63° | 52° | 57° | — | — |
| 2019 | 80° | 53° | 67° | — | — |
| 2018 | 67° | 55° | 61° | 0.91" | — |
| 2017 | 83° | 63° | 73° | — | — |
| 2016 | 77° | 53° | 65° | — | — |
| 2015warmest | 91° | 62° | 77° | — | — |
| 2014 | 83° | 57° | 70° | — | — |
| 2013 | 81° | 60° | 70° | — | — |
| 2012 | 81° | 52° | 66° | — | — |
| 2011 | 77° | 57° | 67° | — | — |
| 2010 | 78° | 47° | 62° | — | — |
| 2009 | 89° | 60° | 75° | — | — |
| 2008 | 82° | 59° | 71° | — | — |
| 2007 | 77° | 56° | 66° | — | — |
| 2006 | 83° | 57° | 70° | — | — |
| 2005 | 75° | 54° | 64° | — | — |
| 2004 | 67° | 57° | 62° | 0.08" | — |
| 2003 | 70° | 57° | 63° | — | — |
| 2002 | 86° | 59° | 73° | — | — |
| 2001 | 82° | 61° | 71° | — | — |
| 2000 | 82° | 58° | 70° | — | — |
| 1999 | 86° | 58° | 72° | — | — |
| 1998 | 82° | 59° | 71° | — | — |
| 1997 | 69° | 56° | 62° | — | — |
| 1996 | 64° | 58° | 61° | — | — |
| 1995 | 82° | 60° | 71° | — | — |
| 1994 | 73° | 51° | 62° | — | — |
| 1993 | 71° | 54° | 62° | — | — |
| 1992 | 66° | 52° | 59° | — | — |
| 1991 | 73° | 56° | 64° | — | — |
| 1990 | 68° | 58° | 63° | — | — |
| 1989 | 87° | 53° | 70° | — | — |
| 1988 | 84° | 56° | 70° | — | — |
| 1987 | 64° | 57° | 61° | — | — |
| 1986 | 71° | 51° | 61° | — | — |
| 1985 | 63° | 54° | 58° | 0.51" | — |
| 1984 | 72° | 52° | 62° | — | — |
| 1983 | 80° | 54° | 67° | — | — |
| 1982 | 70° | 55° | 62° | 0.03" | — |
| 1981 | 81° | 53° | 67° | — | — |
| 1980 | 69° | 54° | 61° | 1.14" | — |
| 1979 | 86° | 52° | 69° | — | — |
| 1978 | 70° | 50° | 60° | — | — |
| 1977 | 87° | 56° | 71° | — | — |
| 1976 | 70° | 57° | 63° | — | — |
| 1975 | 92° | 61° | 76° | — | — |
| 1974 | 78° | 54° | 66° | — | — |
| 1973 | 76° | 55° | 65° | — | — |
| 1972 | 78° | 51° | 65° | — | — |
| 1971 | 79° | 52° | 65° | — | — |
55 years of data from PORTLAND KGW-TV