Weather on March 18
Portland, OR
55 Years of Data
Avg High
57°F
Avg Low
42°F
Warmest
2024
62°F avg
Coldest
2002
37°F avg
About This Date
March 18th in Portland, OR typically brings cool spring weather, with average highs around 57°F and lows near 42°F. Over 56 years of records, the warmest March 18th was in 2024 (62°F average), while the coldest was 2002 (37°F) — a 25°F range across recorded history. Rain or other precipitation has occurred on about 54% of March 18th dates historically, with the wettest March 18th recording 2.62" of rain. The last decade has been 2.2°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.2°F warmer on this date compared to 20-30 years ago.
Planning for March 18th in Portland, OR? Bring layers as temperatures can vary throughout the day. Consider bringing rain gear or an umbrella.
Warming Trend
0.3°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 70° | 49° | 59° | — | — |
| 2025 | 51° | 39° | 45° | 0.03" | — |
| 2024warmest | 76° | 48° | 62° | — | — |
| 2023 | 67° | 40° | 53° | — | — |
| 2022 | 56° | 47° | 51° | 0.08" | — |
| 2021 | 54° | 41° | 47° | 0.56" | — |
| 2020 | 58° | 39° | 48° | — | — |
| 2019 | 68° | 44° | 56° | — | — |
| 2018 | 53° | 41° | 47° | 0.03" | — |
| 2017 | 55° | 39° | 47° | 1.02" | — |
| 2016 | 60° | 36° | 48° | — | — |
| 2015 | 62° | 49° | 55° | — | — |
| 2014 | 55° | 40° | 47° | — | — |
| 2013 | 52° | 38° | 45° | — | — |
| 2012 | 44° | 36° | 40° | 0.33" | — |
| 2011 | 47° | 41° | 44° | 0.61" | — |
| 2010 | 60° | 37° | 49° | — | — |
| 2009 | 60° | 41° | 51° | — | — |
| 2008 | 56° | 44° | 50° | 1.22" | — |
| 2007 | 66° | 53° | 60° | — | — |
| 2006 | 50° | 37° | 44° | — | — |
| 2005 | 53° | 38° | 45° | — | — |
| 2004 | 56° | 45° | 50° | 0.36" | — |
| 2003 | 53° | 40° | 46° | 0.1" | — |
| 2002coldest | 41° | 33° | 37° | 0.74" | — |
| 2001 | 59° | 49° | 54° | 0.97" | — |
| 2000 | 50° | 43° | 46° | 0.48" | — |
| 1999 | 57° | 43° | 50° | 0.13" | — |
| 1998 | 66° | 43° | 54° | — | — |
| 1997 | 57° | 47° | 52° | 1.63" | — |
| 1996 | 69° | 42° | 56° | — | — |
| 1995 | 57° | 46° | 52° | 0.81" | — |
| 1994 | 49° | 38° | 43° | 0.46" | — |
| 1993 | 53° | 46° | 50° | — | — |
| 1992 | 58° | 38° | 48° | — | — |
| 1991 | 50° | 43° | 46° | 0.38" | — |
| 1990 | 65° | 47° | 56° | 0.03" | — |
| 1989 | 54° | 39° | 46° | 0.03" | — |
| 1988 | 70° | 42° | 56° | — | — |
| 1987 | 48° | 36° | 42° | 1.4" | — |
| 1986 | 56° | 44° | 50° | 0.08" | — |
| 1985 | 54° | 39° | 46° | — | — |
| 1984 | 53° | 44° | 49° | 0.66" | — |
| 1983 | 66° | 42° | 54° | — | — |
| 1982 | 59° | 39° | 49° | — | — |
| 1981 | 57° | 39° | 48° | — | — |
| 1980 | 53° | 41° | 47° | 0.1" | — |
| 1979 | 59° | 43° | 51° | 0.03" | — |
| 1978 | 73° | 43° | 58° | — | — |
| 1977 | 49° | 43° | 46° | 0.18" | — |
| 1976 | 52° | 38° | 45° | 1.12" | — |
| 1975 | 50° | 42° | 46° | 2.62" | — |
| 1974 | 61° | 40° | 50° | — | — |
| 1973 | 56° | 37° | 46° | 1.3" | — |
| 1972 | 59° | 49° | 54° | 0.23" | — |
| 1971 | 59° | 36° | 47° | — | — |
56 years of data from PORTLAND KGW-TV