Weather on October 31
Portland, OR
55 Years of Data
Avg High
57°F
Avg Low
44°F
Warmest
1983
57°F avg
Coldest
2002
40°F avg
About This Date
October 31st in Portland, OR typically brings cool fall weather, with average highs around 57°F and lows near 44°F. Over 55 years of records, the warmest October 31st was in 1983 (57°F average), while the coldest was 2002 (40°F) — a 17°F range across recorded history. Rain or other precipitation has occurred on about 60% of October 31st dates historically, with the wettest October 31st recording 6.81" of rain. The last decade has been 2.7°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.7°F warmer on this date compared to 20-30 years ago.
Planning for October 31st in Portland, OR? Bring layers as temperatures can vary throughout the day. Consider bringing rain gear or an umbrella.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 59° | 46° | 53° | 0.86" | — |
| 2024 | 50° | 44° | 47° | 0.69" | — |
| 2023 | 59° | 44° | 52° | — | — |
| 2022 | 56° | 46° | 51° | 3" | — |
| 2021 | 59° | 51° | 55° | — | — |
| 2020 | 58° | 40° | 49° | — | — |
| 2019 | 53° | 34° | 43° | — | — |
| 2018 | 57° | 49° | 53° | 0.43" | — |
| 2017 | 62° | 40° | 51° | — | — |
| 2016 | 56° | 51° | 53° | 0.97" | — |
| 2015 | 62° | 52° | 57° | 5.23" | — |
| 2014 | 58° | 49° | 53° | 2.77" | — |
| 2013 | 59° | 50° | 55° | — | — |
| 2012 | 58° | 53° | 55° | 0.66" | — |
| 2011 | 56° | 44° | 50° | 0.05" | — |
| 2010 | 57° | 45° | 51° | 0.97" | — |
| 2009 | 60° | 48° | 54° | 0.91" | — |
| 2008 | 62° | 52° | 57° | 0.53" | — |
| 2007 | 56° | 37° | 46° | — | — |
| 2006 | 57° | 33° | 45° | — | — |
| 2005 | 57° | 52° | 54° | 3.45" | — |
| 2004 | 54° | 41° | 47° | 0.15" | — |
| 2003 | 45° | 36° | 40° | — | — |
| 2002coldest | 49° | 31° | 40° | — | — |
| 2001 | 55° | 47° | 51° | 0.74" | — |
| 2000 | 55° | 43° | 49° | — | — |
| 1999 | 56° | 44° | 50° | 0.64" | — |
| 1998 | 48° | 41° | 45° | 0.36" | — |
| 1997 | 62° | 50° | 56° | 0.3" | — |
| 1996 | 58° | 39° | 48° | — | — |
| 1995 | 57° | 35° | 46° | — | — |
| 1994 | 54° | 42° | 48° | 6.81" | — |
| 1993 | 59° | 48° | 54° | 0.53" | — |
| 1992 | 57° | 48° | 53° | 2.29" | — |
| 1991 | 48° | 36° | 42° | — | — |
| 1990 | 55° | 44° | 50° | 0.41" | — |
| 1989 | 60° | 44° | 52° | — | — |
| 1988 | 62° | 49° | 55° | — | — |
| 1987 | 59° | 55° | 57° | 0.71" | — |
| 1986 | 59° | 53° | 56° | 0.08" | — |
| 1985 | 50° | 39° | 45° | 0.05" | — |
| 1984 | 48° | 39° | 44° | — | — |
| 1983warmest | 62° | 51° | 57° | 0.03" | — |
| 1982 | 55° | 45° | 50° | — | — |
| 1981 | 65° | 47° | 56° | 0.05" | — |
| 1980 | 56° | 48° | 52° | 0.25" | — |
| 1979 | 62° | 38° | 50° | — | — |
| 1978 | 61° | 37° | 49° | — | — |
| 1977 | 54° | 45° | 49° | 0.25" | — |
| 1976 | 62° | 47° | 54° | 1.24" | — |
| 1975 | 58° | 43° | 50° | — | — |
| 1974 | 57° | 45° | 51° | 0.25" | — |
| 1973 | 58° | 44° | 51° | 1.93" | — |
| 1972 | 53° | 36° | 44° | — | — |
| 1971 | 50° | 43° | 46° | 0.33" | — |
55 years of data from PORTLAND KGW-TV