Weather on December 20
Portland, OR
55 Years of Data
Avg High
45°F
Avg Low
37°F
Warmest
1972
55°F avg
Coldest
1990
16°F avg
About This Date
December 20th in Portland, OR typically brings chilly winter weather, with average highs around 45°F and lows near 37°F. Over 55 years of records, the warmest December 20th was in 1972 (55°F average), while the coldest was 1990 (16°F) — a 39°F range across recorded history. Precipitation has occurred on 71% of recorded December 20th dates, with snow falling 5% of the time (heaviest snowfall: 8"). The last decade has been 5.1°F warmer on this date compared to 20-30 years ago.
The last decade has been 5.1°F warmer on this date compared to 20-30 years ago.
Planning for December 20th in Portland, OR? Bring layers as temperatures can vary throughout the day. Consider bringing rain gear or an umbrella.
Warming Trend
0.9°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 50° | 42° | 46° | 0.05" | — |
| 2024 | 56° | 45° | 50° | — | — |
| 2023 | 52° | 37° | 44° | — | — |
| 2022 | 47° | 35° | 41° | 0.41" | — |
| 2021 | 40° | 37° | 38° | 1.63" | — |
| 2020 | 57° | 46° | 52° | 3.84" | — |
| 2019 | 57° | 51° | 54° | 1.09" | — |
| 2018 | 57° | 43° | 50° | 0.33" | — |
| 2017 | 45° | 34° | 39° | 0.13" | — |
| 2016 | 50° | 37° | 44° | 1.65" | — |
| 2015 | 47° | 41° | 44° | 1.57" | — |
| 2014 | 57° | 45° | 51° | 3.12" | — |
| 2013 | 44° | 33° | 39° | 0.23" | — |
| 2012 | 45° | 36° | 40° | 3" | — |
| 2011 | 43° | 39° | 41° | — | — |
| 2010 | 44° | 36° | 40° | 1.12" | — |
| 2009 | 53° | 46° | 50° | 0.89" | — |
| 2008 | 30° | 18° | 24° | — | 8" |
| 2007 | 44° | 38° | 41° | 0.46" | — |
| 2006 | 40° | 30° | 35° | 0.46" | — |
| 2005 | 42° | 37° | 40° | 0.79" | — |
| 2004 | 47° | 38° | 42° | 0.03" | — |
| 2003 | 48° | 40° | 44° | 1.07" | — |
| 2002 | 47° | 42° | 44° | 0.25" | — |
| 2001 | 44° | 40° | 42° | 0.66" | — |
| 2000 | 42° | 38° | 40° | 0.56" | — |
| 1999 | 54° | 45° | 49° | 0.46" | — |
| 1998 | 25° | 18° | 21° | — | — |
| 1997 | 46° | 37° | 42° | 0.99" | — |
| 1996 | 47° | 40° | 43° | 0.51" | — |
| 1995 | 48° | 42° | 45° | — | — |
| 1994 | 63° | 47° | 55° | 0.71" | — |
| 1993 | 36° | 28° | 32° | — | — |
| 1992 | 46° | 40° | 43° | 0.2" | — |
| 1991 | 47° | 33° | 40° | — | — |
| 1990coldest | 19° | 13° | 16° | — | — |
| 1989 | 39° | 31° | 35° | — | — |
| 1988 | 43° | 39° | 41° | 0.97" | — |
| 1987 | 43° | 30° | 36° | 0.46" | — |
| 1986 | 43° | 36° | 39° | — | — |
| 1985 | 36° | 29° | 32° | — | — |
| 1984 | 28° | 18° | 23° | 0.56" | 2" |
| 1983 | 31° | 20° | 25° | — | — |
| 1982 | 48° | 38° | 43° | 2.77" | — |
| 1981 | 43° | 39° | 41° | 0.38" | — |
| 1980 | 46° | 38° | 42° | 0.86" | — |
| 1979 | 52° | 47° | 49° | 1.35" | — |
| 1978 | 40° | 30° | 35° | 0.91" | 1" |
| 1977 | 44° | 39° | 42° | — | — |
| 1976 | 40° | 32° | 36° | — | — |
| 1975 | 44° | 36° | 40° | — | — |
| 1974 | 58° | 49° | 53° | 0.94" | — |
| 1973 | 55° | 42° | 49° | 2.31" | — |
| 1972warmest | 59° | 52° | 55° | 2.26" | — |
| 1971 | 44° | 42° | 43° | 2.46" | — |
55 years of data from PORTLAND KGW-TV