Weather on September 17
Portland, OR
55 Years of Data
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° | — | — |
Portland, OR Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Portland, OR Monthly Precipitation
Average rainfall and snowfall per month, in inches.
Portland, OR Daily Temperature Calendar
Average daily high temperature for every day of the year. Each cell is the climatological mean for that calendar day across 55 years of NOAA data.
Best Time to Visit Portland, OR
Portland, OR has no months that meet our "pleasant" threshold — every season has tradeoffs.