Weather on September 18
Gresham, OR
55 Years of Data
Avg High
73°F
Avg Low
51°F
Warmest
1994
72°F avg
Coldest
1985
53°F avg
About This Date
September 18th in Gresham, OR typically brings pleasant fall weather, with average highs around 73°F and lows near 51°F. Over 50 years of records, the warmest September 18th was in 1994 (72°F average), while the coldest was 1985 (53°F) — a 19°F range across recorded history. Rain or other precipitation has occurred on about 40% of September 18th dates historically, with the wettest September 18th recording 3.15" of rain. The last decade has been 2.0°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.0°F warmer on this date compared to 20-30 years ago.
Planning for September 18th in Gresham, OR? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Warming Trend
0.3°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 79° | 56° | 67° | — | — |
| 2024 | 72° | 60° | 66° | — | — |
| 2023 | 74° | 56° | 65° | — | — |
| 2022 | 79° | 55° | 67° | — | — |
| 2021 | 68° | 57° | 63° | 3.15" | — |
| 2020 | 68° | 58° | 63° | 2.87" | — |
| 2019 | 68° | 52° | 60° | 0.58" | — |
| 2018 | 71° | 45° | 58° | — | — |
| 2017 | 61° | 54° | 57° | 0.81" | — |
| 2016 | 71° | 54° | 62° | 0.23" | — |
| 2015 | 75° | 52° | 63° | — | — |
| 2014 | 74° | 59° | 66° | 0.13" | — |
| 2013 | 73° | 50° | 62° | — | — |
| 2012 | 89° | 48° | 69° | — | — |
| 2011 | 66° | 58° | 62° | 0.51" | — |
| 2010 | 69° | 58° | 63° | 1.83" | — |
| 2009 | 83° | 48° | 65° | — | — |
| 2008 | 63° | 54° | 58° | — | — |
| 2007 | 64° | 45° | 54° | — | — |
| 2006 | 71° | 56° | 63° | 0.99" | — |
| 2005 | 72° | 41° | 56° | — | — |
| 2004 | 58° | 49° | 53° | 0.08" | — |
| 2003 | 75° | 47° | 61° | — | — |
| 2002 | 75° | 46° | 61° | 0.03" | — |
| 2001 | 68° | 49° | 58° | — | — |
| 2000 | 82° | 57° | 70° | — | — |
| 1999 | 94° | 46° | 70° | — | — |
| 1998 | 68° | 57° | 63° | 1.78" | — |
| 1997 | 69° | 52° | 60° | 0.53" | — |
| 1996 | 66° | 46° | 56° | 0.64" | — |
| 1994warmest | 87° | 57° | 72° | — | — |
| 1993 | 80° | 50° | 65° | — | — |
| 1991 | 91° | — | — | — | — |
| 1989 | 73° | 40° | 56° | — | — |
| 1988 | 70° | 37° | 53° | — | — |
| 1987 | 79° | 43° | 61° | — | — |
| 1986 | 61° | 50° | 55° | 1.04" | — |
| 1985coldest | 62° | 44° | 53° | 0.94" | — |
| 1984 | 86° | 54° | 70° | — | — |
| 1981 | 80° | 54° | 67° | — | — |
| 1980 | 78° | 50° | 64° | 0.48" | — |
| 1979 | 88° | 51° | 69° | — | — |
| 1978 | 61° | 47° | 54° | 0.05" | — |
| 1977 | 65° | 54° | 59° | 0.1" | — |
| 1976 | 63° | 51° | 57° | — | — |
| 1975 | 71° | 54° | 62° | — | — |
| 1974 | 86° | 50° | 68° | — | — |
| 1973 | 70° | 53° | 61° | 0.18" | — |
| 1972 | 69° | 47° | 58° | — | — |
| 1971 | 75° | 59° | 67° | — | — |
50 years of data from PORTLAND TROUTDALE AP