Weather on March 18
Hillsboro, OR
55 Years of Data
Avg High
58°F
Avg Low
38°F
Warmest
2024
58°F avg
Coldest
2002
34°F avg
About This Date
March 18th in Hillsboro, OR typically brings cool spring weather, with average highs around 58°F and lows near 38°F. Over 56 years of records, the warmest March 18th was in 2024 (58°F average), while the coldest was 2002 (34°F) — a 24°F range across recorded history. Rain or other precipitation has occurred on about 46% of March 18th dates historically, with the wettest March 18th recording 1.5" of rain. Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for March 18th 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 | 68° | 44° | 56° | — | — |
| 2025 | 51° | 32° | 42° | 0.08" | — |
| 2024warmest | 77° | 40° | 58° | — | — |
| 2023 | 66° | 32° | 49° | — | — |
| 2022 | 58° | 43° | 50° | — | — |
| 2021 | 53° | 34° | 43° | 0.38" | — |
| 2020 | 58° | 31° | 45° | — | — |
| 2019 | 69° | 39° | 54° | — | — |
| 2018 | 52° | 35° | 43° | — | — |
| 2017 | 55° | 32° | 44° | 1.3" | — |
| 2016 | 61° | 48° | 54° | — | — |
| 2015 | 62° | 41° | 52° | — | — |
| 2014 | 56° | 34° | 45° | — | — |
| 2013 | 53° | 30° | 42° | — | — |
| 2012 | 46° | 28° | 37° | 0.08" | — |
| 2011 | 47° | 40° | 43° | 0.2" | — |
| 2010 | 62° | 30° | 46° | — | — |
| 2009 | 58° | 38° | 48° | — | — |
| 2008 | 53° | 36° | 44° | 0.41" | — |
| 2007 | 67° | 46° | 56° | — | — |
| 2006 | 50° | 35° | 43° | — | — |
| 2005 | 53° | 29° | 41° | — | — |
| 2004 | 52° | 42° | 47° | 0.15" | — |
| 2003 | 54° | 37° | 45° | 0.36" | — |
| 2002coldest | 41° | 27° | 34° | — | — |
| 2001 | 59° | 49° | 54° | 0.3" | — |
| 2000 | 55° | 44° | 50° | 0.2" | — |
| 1999 | 60° | 42° | 51° | — | — |
| 1998 | 67° | 45° | 56° | — | — |
| 1997 | 58° | 51° | 54° | 1.09" | — |
| 1996 | 72° | 39° | 55° | — | — |
| 1995 | 58° | 41° | 49° | 0.05" | — |
| 1994 | 54° | 44° | 49° | 0.36" | — |
| 1993 | 48° | 43° | 45° | 0.91" | — |
| 1992 | 59° | 33° | 46° | 0.23" | — |
| 1991 | 63° | 35° | 49° | — | — |
| 1990 | 62° | 40° | 51° | — | — |
| 1989 | 48° | 42° | 45° | 0.76" | — |
| 1988 | 67° | 32° | 49° | — | — |
| 1987 | 56° | 41° | 48° | 0.13" | — |
| 1986 | 54° | 42° | 48° | 0.08" | — |
| 1985 | 55° | 31° | 43° | — | — |
| 1984 | 54° | 42° | 48° | 0.38" | — |
| 1983 | 65° | 35° | 50° | — | — |
| 1982 | 59° | 30° | 45° | — | — |
| 1981 | 61° | 31° | 46° | 0.05" | — |
| 1980 | 51° | 37° | 44° | 0.05" | — |
| 1979 | 58° | 33° | 45° | — | — |
| 1978 | 73° | 35° | 54° | — | — |
| 1977 | 51° | 42° | 47° | 0.1" | — |
| 1976 | 53° | 37° | 45° | 0.79" | — |
| 1975 | 50° | 44° | 47° | 1.5" | — |
| 1974 | 62° | 36° | 49° | — | — |
| 1973 | 53° | 40° | 46° | 0.43" | — |
| 1972 | 60° | 48° | 54° | 0.15" | — |
| 1971 | 59° | 31° | 45° | — | — |
56 years of data from HILLSBORO