Weather on September 4
Portland, OR
55 Years of Data
Avg High
79°F
Avg Low
57°F
Warmest
2003
79°F avg
Coldest
1996
58°F avg
About This Date
September 4th in Portland, OR typically brings pleasant fall weather, with average highs around 79°F and lows near 57°F. Over 55 years of records, the warmest September 4th was in 2003 (79°F average), while the coldest was 1996 (58°F) — a 21°F range across recorded history. Rain or other precipitation has occurred on about 16% of September 4th dates historically, with the wettest September 4th recording 0.61" of rain. The last decade has been 4.2°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.2°F warmer on this date compared to 20-30 years ago.
Planning for September 4th in Portland, OR? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 86° | 63° | 74° | — | — |
| 2024 | 89° | 58° | 73° | — | — |
| 2023 | 68° | 55° | 62° | 0.03" | — |
| 2022 | 85° | 57° | 71° | — | — |
| 2021 | 86° | 56° | 71° | — | — |
| 2020 | 85° | 58° | 71° | — | — |
| 2019 | 77° | 62° | 70° | — | — |
| 2018 | 80° | 52° | 66° | — | — |
| 2017 | 88° | 65° | 76° | — | — |
| 2016 | 69° | 51° | 60° | — | — |
| 2015 | 66° | 50° | 58° | 0.3" | — |
| 2014 | 83° | 54° | 68° | — | — |
| 2013 | 73° | 62° | 68° | — | — |
| 2012 | 81° | 57° | 69° | — | — |
| 2011 | 90° | 56° | 73° | — | — |
| 2010 | 71° | 54° | 62° | — | — |
| 2009 | 79° | 58° | 68° | — | — |
| 2008 | 77° | 53° | 65° | — | — |
| 2007 | 75° | 58° | 66° | 0.36" | — |
| 2006 | 84° | 56° | 70° | — | — |
| 2005 | 71° | 55° | 63° | — | — |
| 2004 | 70° | 57° | 63° | — | — |
| 2003warmest | 94° | 64° | 79° | — | — |
| 2002 | 74° | 49° | 61° | — | — |
| 2001 | 69° | 50° | 60° | 0.03" | — |
| 2000 | 69° | 50° | 60° | 0.33" | — |
| 1999 | 80° | 56° | 68° | — | — |
| 1998 | 86° | 59° | 73° | — | — |
| 1997 | 78° | 56° | 67° | — | — |
| 1996coldest | 64° | 52° | 58° | 0.13" | — |
| 1995 | 75° | 58° | 66° | 0.03" | — |
| 1994 | 74° | 55° | 64° | — | — |
| 1993 | 74° | 57° | 65° | — | — |
| 1992 | 66° | 54° | 60° | — | — |
| 1991 | 91° | 63° | 77° | — | — |
| 1990 | 91° | 62° | 77° | — | — |
| 1989 | 78° | 53° | 66° | — | — |
| 1988 | 84° | 57° | 71° | — | — |
| 1987 | 85° | 56° | 70° | — | — |
| 1986 | 89° | 63° | 76° | — | — |
| 1985 | 71° | 57° | 64° | — | — |
| 1984 | 83° | 58° | 70° | — | — |
| 1983 | 70° | 58° | 64° | — | — |
| 1982 | 76° | 58° | 67° | — | — |
| 1981 | 73° | 56° | 64° | — | — |
| 1980 | 82° | 51° | 67° | — | — |
| 1979 | 77° | 59° | 68° | — | — |
| 1978 | 63° | 55° | 59° | 0.53" | — |
| 1977 | 74° | 63° | 68° | 0.61" | — |
| 1976 | 78° | 58° | 68° | — | — |
| 1975 | 87° | 55° | 71° | — | — |
| 1974 | 80° | 55° | 68° | — | — |
| 1973 | 96° | 58° | 77° | — | — |
| 1972 | 85° | 56° | 70° | — | — |
| 1971 | 82° | 53° | 68° | — | — |
55 years of data from PORTLAND KGW-TV