Weather on March 15
Hillsboro, OR
55 Years of Data
Avg High
56°F
Avg Low
37°F
Warmest
1972
60°F avg
Coldest
2021
36°F avg
About This Date
March 15th in Hillsboro, OR typically brings cool spring weather, with average highs around 56°F and lows near 37°F. Over 56 years of records, the warmest March 15th was in 1972 (60°F average), while the coldest was 2021 (36°F) — a 24°F range across recorded history. Rain or other precipitation has occurred on about 63% of March 15th dates historically, with the wettest March 15th recording 2.36" 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 Hillsboro, 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° | 36° | 43° | 0.08" | — |
| 2025 | 49° | 41° | 45° | 1.55" | — |
| 2024 | 70° | 37° | 53° | — | — |
| 2023 | 51° | 32° | 42° | — | — |
| 2022 | 57° | 39° | 48° | 0.46" | — |
| 2021coldest | 46° | 26° | 36° | 0.05" | — |
| 2020 | 46° | 34° | 40° | — | — |
| 2019 | 63° | 34° | 48° | — | — |
| 2018 | 53° | 32° | 43° | 0.51" | — |
| 2017 | 56° | 43° | 49° | 1.83" | — |
| 2016 | 46° | 39° | 43° | 0.64" | — |
| 2015 | 60° | 40° | 50° | 2.36" | — |
| 2014 | 65° | 37° | 51° | — | — |
| 2013 | 61° | 41° | 51° | 0.03" | — |
| 2012 | 54° | 43° | 48° | 1.78" | — |
| 2011 | 52° | 41° | 46° | 0.79" | — |
| 2010 | 64° | 41° | 53° | — | — |
| 2009 | 52° | 37° | 44° | 1.19" | — |
| 2008 | 50° | 38° | 44° | 0.15" | — |
| 2007 | 56° | 29° | 43° | — | — |
| 2006 | 49° | 36° | 42° | 0.43" | — |
| 2005 | 61° | 28° | 44° | — | — |
| 2004 | 63° | 42° | 52° | — | — |
| 2003 | 59° | 47° | 53° | 0.51" | — |
| 2002 | 48° | 34° | 41° | 0.05" | — |
| 2001 | 51° | 37° | 44° | 0.38" | — |
| 2000 | 55° | 36° | 45° | 1.02" | — |
| 1999 | 51° | 37° | 44° | 0.13" | — |
| 1998 | 61° | 45° | 53° | — | — |
| 1997 | 58° | 40° | 49° | 0.25" | — |
| 1996 | 57° | 33° | 45° | — | — |
| 1995 | 58° | 36° | 47° | — | — |
| 1994 | 68° | 37° | 53° | — | — |
| 1993 | 60° | 45° | 52° | 0.36" | — |
| 1992 | 67° | 42° | 54° | 0.36" | — |
| 1991 | 48° | 33° | 41° | 0.23" | — |
| 1990 | 56° | 36° | 46° | 0.25" | — |
| 1989 | 50° | 40° | 45° | 0.46" | — |
| 1988 | 58° | 29° | 43° | — | — |
| 1987 | 55° | 35° | 45° | 0.2" | — |
| 1986 | 55° | 38° | 46° | 0.18" | — |
| 1985 | 60° | 29° | 44° | — | — |
| 1984 | 59° | 45° | 52° | 1.09" | — |
| 1983 | 49° | 37° | 43° | 0.1" | — |
| 1982 | 48° | 33° | 41° | — | — |
| 1981 | 62° | 40° | 51° | 0.69" | — |
| 1980 | 47° | 33° | 40° | 0.91" | — |
| 1979 | 55° | 35° | 45° | 0.43" | — |
| 1978 | 58° | 29° | 43° | — | — |
| 1977 | 56° | 30° | 43° | 0.03" | — |
| 1976 | 59° | 34° | 46° | — | — |
| 1975 | 47° | 38° | 42° | 0.64" | — |
| 1974 | 66° | 44° | 55° | 0.36" | — |
| 1973 | 62° | 37° | 50° | — | — |
| 1972warmest | 68° | 52° | 60° | — | — |
| 1971 | 49° | 33° | 41° | — | — |
56 years of data from HILLSBORO