Weather on December 18
Portland, OR
55 Years of Data
Avg High
46°F
Avg Low
37°F
Warmest
1979
53°F avg
Coldest
1984
28°F avg
About This Date
December 18th in Portland, OR typically brings chilly winter weather, with average highs around 46°F and lows near 37°F. Over 55 years of records, the warmest December 18th was in 1979 (53°F average), while the coldest was 1984 (28°F) — a 25°F range across recorded history. Precipitation has occurred on 60% of recorded December 18th dates, with snow falling 2% of the time. The last decade has been 4.4°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.4°F warmer on this date compared to 20-30 years ago.
Planning for December 18th in Portland, OR? Bring layers as temperatures can vary throughout the day. Consider bringing rain gear or an umbrella.
Warming Trend
0.7°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 57° | 41° | 49° | 5.03" | — |
| 2024 | 58° | 46° | 52° | 0.46" | — |
| 2023 | 46° | 42° | 44° | — | — |
| 2022 | 42° | 36° | 39° | 0.28" | — |
| 2021 | 51° | 39° | 45° | 2.46" | — |
| 2020 | 51° | 44° | 48° | 0.33" | — |
| 2019 | 42° | 38° | 40° | 0.33" | — |
| 2018 | 56° | 47° | 51° | 2.44" | — |
| 2017 | 52° | 45° | 48° | — | — |
| 2016 | 37° | 27° | 32° | — | — |
| 2015 | 54° | 42° | 48° | 1.04" | — |
| 2014 | 49° | 43° | 46° | 0.64" | — |
| 2013 | 43° | 35° | 39° | 0.05" | — |
| 2012 | 38° | 33° | 35° | 0.71" | — |
| 2011 | 49° | 35° | 42° | 0.05" | — |
| 2010 | 46° | 35° | 41° | 0.74" | — |
| 2009 | 52° | 42° | 47° | 0.05" | — |
| 2008 | 39° | 32° | 36° | 0.61" | — |
| 2007 | 50° | 40° | 45° | 0.86" | — |
| 2006 | 38° | 28° | 33° | — | — |
| 2005 | 33° | 27° | 30° | — | 1" |
| 2004 | 52° | 39° | 45° | — | — |
| 2003 | 50° | 43° | 46° | — | — |
| 2002 | 45° | 37° | 41° | 0.99" | — |
| 2001 | 45° | 40° | 42° | 0.81" | — |
| 2000 | 49° | 36° | 42° | — | — |
| 1999 | 53° | 39° | 46° | — | — |
| 1998 | 43° | 32° | 37° | — | — |
| 1997 | 41° | 37° | 39° | 0.1" | — |
| 1996 | 41° | 31° | 36° | — | — |
| 1995 | 43° | 39° | 41° | 0.41" | — |
| 1994 | 52° | 47° | 49° | 0.25" | — |
| 1993 | 38° | 28° | 33° | — | — |
| 1992 | 38° | 31° | 34° | 0.03" | — |
| 1991 | 44° | 35° | 40° | 1.65" | — |
| 1990 | 49° | 31° | 40° | 0.33" | — |
| 1989 | 33° | 31° | 32° | — | — |
| 1988 | 45° | 28° | 36° | 0.2" | — |
| 1987 | 36° | 33° | 34° | — | — |
| 1986 | 40° | 37° | 38° | 0.2" | — |
| 1985 | 39° | 27° | 33° | — | — |
| 1984coldest | 32° | 24° | 28° | — | — |
| 1983 | 38° | 30° | 34° | 0.05" | — |
| 1982 | 50° | 39° | 45° | 0.33" | — |
| 1981 | 43° | 38° | 40° | 1.52" | — |
| 1980 | 47° | 38° | 42° | — | — |
| 1979warmest | 57° | 48° | 53° | 0.86" | — |
| 1978 | 42° | 31° | 36° | — | — |
| 1977 | 46° | 35° | 41° | 0.05" | — |
| 1976 | 44° | 40° | 42° | — | — |
| 1975 | 48° | 36° | 42° | — | — |
| 1974 | 53° | 40° | 46° | 0.71" | — |
| 1973 | 54° | 39° | 46° | — | — |
| 1972 | 56° | 46° | 51° | 1.78" | — |
| 1971 | 47° | 37° | 42° | — | — |
55 years of data from PORTLAND KGW-TV