Weather on April 18
Hillsboro, OR
55 Years of Data
Avg High
61°F
Avg Low
40°F
Warmest
2016
67°F avg
Coldest
2008
41°F avg
About This Date
April 18th in Hillsboro, OR typically brings mild spring weather, with average highs around 61°F and lows near 40°F. Over 55 years of records, the warmest April 18th was in 2016 (67°F average), while the coldest was 2008 (41°F) — a 26°F range across recorded history. Rain or other precipitation has occurred on about 53% of April 18th dates historically, with the wettest April 18th recording 1.17" of rain. The last decade has been 3.4°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.4°F warmer on this date compared to 20-30 years ago.
Planning for April 18th in Hillsboro, OR? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Warming Trend
0.8°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 76° | 37° | 56° | — | — |
| 2024 | 69° | 34° | 51° | — | — |
| 2023 | 50° | 37° | 44° | 0.36" | — |
| 2022 | 50° | 41° | 46° | 1.17" | — |
| 2021 | 83° | 39° | 61° | — | — |
| 2020 | 54° | 44° | 49° | 0.2" | — |
| 2019 | 75° | 44° | 60° | — | — |
| 2018 | 62° | 40° | 51° | — | — |
| 2017 | 63° | 45° | 54° | 0.13" | — |
| 2016warmest | 88° | 47° | 67° | — | — |
| 2015 | 77° | 38° | 57° | — | — |
| 2014 | 59° | 33° | 46° | — | — |
| 2013 | 58° | 44° | 51° | 0.51" | — |
| 2012 | 58° | 42° | 50° | 0.03" | — |
| 2011 | 54° | 29° | 42° | 0.03" | — |
| 2010 | 72° | 41° | 56° | — | — |
| 2009 | 65° | 32° | 48° | — | — |
| 2008coldest | 50° | 31° | 41° | — | — |
| 2007 | 52° | 37° | 44° | 0.58" | — |
| 2006 | 62° | 31° | 47° | — | — |
| 2005 | 58° | 41° | 49° | 0.23" | — |
| 2004 | 58° | 37° | 47° | 0.28" | — |
| 2003 | 57° | 38° | 47° | 0.05" | — |
| 2002 | 53° | 38° | 45° | 0.03" | — |
| 2001 | 58° | 36° | 47° | — | — |
| 2000 | 74° | 51° | 62° | — | — |
| 1999 | 63° | 50° | 56° | 0.03" | — |
| 1998 | 64° | 40° | 52° | — | — |
| 1997 | 55° | 48° | 52° | 0.41" | — |
| 1996 | 54° | 43° | 48° | 0.74" | — |
| 1995 | 53° | 32° | 43° | 0.1" | — |
| 1994 | 74° | 52° | 63° | — | — |
| 1993 | 60° | 45° | 52° | 0.36" | — |
| 1992 | 59° | 44° | 52° | 0.2" | — |
| 1991 | 57° | 45° | 51° | — | — |
| 1990 | 59° | 49° | 54° | 0.03" | — |
| 1989 | 72° | 44° | 58° | — | — |
| 1988 | 56° | 38° | 47° | — | — |
| 1987 | 47° | 37° | 42° | 1.17" | — |
| 1986 | 59° | 35° | 47° | — | — |
| 1985 | 62° | 43° | 52° | 0.15" | — |
| 1984 | 59° | 35° | 47° | 0.53" | — |
| 1983 | 78° | 49° | 63° | — | — |
| 1982 | 54° | 32° | 43° | 0.13" | — |
| 1981 | 70° | 38° | 54° | — | — |
| 1980 | 64° | 43° | 53° | — | — |
| 1979 | 53° | 35° | 44° | 0.1" | — |
| 1978 | 63° | 45° | 54° | 0.74" | — |
| 1977 | 57° | 34° | 45° | 0.03" | — |
| 1976 | 56° | 32° | 44° | — | — |
| 1975 | 58° | 43° | 50° | 0.15" | — |
| 1974 | 61° | 45° | 53° | — | — |
| 1973 | 52° | 40° | 46° | 0.64" | — |
| 1972 | 55° | 31° | 43° | — | — |
| 1971 | 55° | 34° | 44° | 0.03" | — |
55 years of data from HILLSBORO