Weather on March 15
Portland, OR
55 Years of Data
Avg High
56°F
Avg Low
41°F
Warmest
1972
60°F avg
Coldest
1980
39°F avg
About This Date
March 15th in Portland, OR typically brings cool spring weather, with average highs around 56°F and lows near 41°F. Over 56 years of records, the warmest March 15th was in 1972 (60°F average), while the coldest was 1980 (39°F) — a 21°F range across recorded history. Rain or other precipitation has occurred on about 57% of March 15th dates historically, with the wettest March 15th recording 4.22" of rain. The last decade has been 2.5°F cooler on this date compared to 20-30 years ago.
The last decade has been 2.5°F cooler on this date compared to 20-30 years ago.
Planning for March 15th 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 |
|---|---|---|---|---|---|
| 2026 | 51° | 38° | 44° | 0.08" | — |
| 2025 | 47° | 41° | 44° | 1.91" | — |
| 2024 | 68° | 43° | 55° | — | — |
| 2023 | 49° | 38° | 43° | 0.1" | — |
| 2022 | 55° | 45° | 50° | 0.46" | — |
| 2021 | 45° | 37° | 41° | 0.08" | — |
| 2020 | 44° | 33° | 39° | — | — |
| 2019 | 62° | 39° | 51° | — | — |
| 2018 | 54° | 36° | 45° | 0.38" | — |
| 2017 | 55° | 47° | 51° | 1.91" | — |
| 2016 | 46° | 41° | 44° | 0.71" | — |
| 2015 | 60° | 49° | 54° | 4.22" | — |
| 2014 | 64° | 41° | 53° | — | — |
| 2013 | 64° | 51° | 58° | — | — |
| 2012 | 54° | 45° | 49° | 4.04" | — |
| 2011 | 52° | 43° | 47° | 1.7" | — |
| 2010 | 64° | 46° | 55° | — | — |
| 2009 | 52° | 40° | 46° | 1.8" | — |
| 2008 | 49° | 40° | 44° | 0.61" | — |
| 2007 | 56° | 36° | 46° | — | — |
| 2006 | 49° | 39° | 44° | — | — |
| 2005 | 64° | 39° | 52° | — | — |
| 2004 | 64° | 46° | 55° | — | — |
| 2003 | 57° | 46° | 52° | 0.43" | — |
| 2002 | 44° | 35° | 40° | 0.28" | — |
| 2001 | 49° | 40° | 44° | 0.94" | — |
| 2000 | 56° | 33° | 44° | 0.08" | — |
| 1999 | 57° | 37° | 47° | 0.03" | — |
| 1998 | 58° | 49° | 53° | 0.08" | — |
| 1997 | — | 38° | — | 1.35" | — |
| 1996 | 57° | 43° | 50° | — | — |
| 1995 | 58° | 44° | 51° | — | — |
| 1994 | 57° | 44° | 51° | 0.25" | — |
| 1993 | 52° | 43° | 47° | 0.84" | — |
| 1992 | 61° | 50° | 55° | 0.81" | — |
| 1991 | 51° | 39° | 45° | — | — |
| 1990 | 63° | 40° | 51° | — | — |
| 1989 | 54° | 42° | 48° | 0.81" | — |
| 1988 | 63° | 34° | 48° | — | — |
| 1987 | 50° | 40° | 45° | — | — |
| 1986 | 56° | 42° | 49° | 0.25" | — |
| 1985 | 63° | 37° | 50° | — | — |
| 1984 | 60° | 46° | 53° | 0.76" | — |
| 1983 | 56° | 40° | 48° | — | — |
| 1982 | 50° | 35° | 43° | 0.03" | — |
| 1981 | 52° | 46° | 49° | 1.45" | — |
| 1980coldest | 45° | 34° | 39° | 0.97" | — |
| 1979 | 53° | 45° | 49° | 1.02" | — |
| 1978 | 59° | 34° | 46° | — | — |
| 1977 | 58° | 33° | 45° | — | — |
| 1976 | 60° | 40° | 50° | — | — |
| 1975 | 47° | 39° | 43° | 1.45" | — |
| 1974 | 59° | 43° | 51° | 0.48" | — |
| 1973 | 65° | 43° | 54° | — | — |
| 1972warmest | 69° | 52° | 60° | — | — |
| 1971 | 49° | 37° | 43° | — | — |
56 years of data from PORTLAND KGW-TV