Weather on December 1
Portland, OR
55 Years of Data
Avg High
48°F
Avg Low
39°F
Warmest
2021
55°F avg
Coldest
1985
21°F avg
About This Date
December 1st in Portland, OR typically brings chilly winter weather, with average highs around 48°F and lows near 39°F. Over 55 years of records, the warmest December 1st was in 2021 (55°F average), while the coldest was 1985 (21°F) — a 34°F range across recorded history. Rain or other precipitation has occurred on about 67% of December 1st dates historically, with the wettest December 1st recording 4.01" of rain. The last decade has been 1.8°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.8°F cooler on this date compared to 20-30 years ago.
Planning for December 1st in Portland, OR? Bring layers as temperatures can vary throughout the day. Consider bringing rain gear or an umbrella.
Cooling Trend
0.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 48° | 35° | 42° | — | — |
| 2024 | 45° | 30° | 37° | — | — |
| 2023 | 51° | 37° | 44° | 1.4" | — |
| 2022 | 40° | 34° | 37° | 0.1" | — |
| 2021warmest | 62° | 48° | 55° | — | — |
| 2020 | 47° | 34° | 40° | — | — |
| 2019 | 42° | 29° | 35° | 0.28" | — |
| 2018 | 45° | 41° | 43° | 0.18" | — |
| 2017 | 48° | 44° | 46° | 0.23" | — |
| 2016 | 45° | 40° | 42° | 0.05" | — |
| 2015 | 40° | 33° | 36° | 1.37" | — |
| 2014 | 36° | 30° | 33° | — | — |
| 2013 | 56° | 48° | 52° | 2.51" | — |
| 2012 | 53° | 46° | 50° | 1.45" | — |
| 2011 | 46° | 36° | 41° | — | — |
| 2010 | 49° | 43° | 46° | 0.71" | — |
| 2009 | 53° | 42° | 48° | — | — |
| 2008 | 56° | 45° | 50° | 0.41" | — |
| 2007 | 41° | 34° | 37° | 0.58" | — |
| 2006 | 45° | 37° | 41° | 0.13" | — |
| 2005 | 43° | 36° | 39° | 1.24" | — |
| 2004 | 46° | 37° | 42° | 0.15" | — |
| 2003 | 48° | 42° | 45° | 0.61" | — |
| 2002 | 41° | 34° | 37° | — | — |
| 2001 | 47° | 44° | 45° | 3.07" | — |
| 2000 | 49° | 42° | 45° | — | — |
| 1999 | 59° | 41° | 50° | — | — |
| 1998 | 50° | 43° | 46° | 1.65" | — |
| 1997 | 52° | 41° | 46° | — | — |
| 1996 | 49° | 40° | 44° | 0.33" | — |
| 1995 | 52° | 45° | 48° | 0.84" | — |
| 1994 | 49° | 43° | 46° | 0.81" | — |
| 1993 | 58° | 47° | 52° | 3.15" | — |
| 1992 | 42° | 37° | 40° | 1.65" | — |
| 1991 | 48° | 40° | 44° | 0.36" | — |
| 1990 | 46° | 36° | 41° | 1.98" | — |
| 1989 | 45° | 40° | 42° | — | — |
| 1988 | 48° | 34° | 41° | — | — |
| 1987 | 52° | 42° | 47° | 4.01" | — |
| 1986 | 46° | 38° | 42° | 0.08" | — |
| 1985coldest | 23° | 19° | 21° | 0.18" | — |
| 1984 | 42° | 36° | 39° | 0.03" | — |
| 1983 | 45° | 37° | 41° | — | — |
| 1982 | 48° | 39° | 44° | — | — |
| 1981 | 53° | 44° | 49° | 0.43" | — |
| 1980 | 47° | 41° | 44° | 0.25" | — |
| 1979 | 52° | 35° | 43° | 1.7" | — |
| 1978 | 50° | 41° | 46° | 0.2" | — |
| 1977 | 56° | 42° | 49° | 0.13" | — |
| 1976 | 49° | 28° | 38° | — | — |
| 1975 | 55° | 44° | 50° | 0.46" | — |
| 1974 | 47° | 40° | 43° | — | — |
| 1973 | 50° | 44° | 47° | 0.03" | — |
| 1972 | 53° | 42° | 48° | 0.08" | — |
| 1971 | 49° | 35° | 42° | — | — |
55 years of data from PORTLAND KGW-TV