Weather on May 1
Hillsboro, OR
55 Years of Data
Avg High
66°F
Avg Low
41°F
Warmest
1998
72°F avg
Coldest
1988
44°F avg
About This Date
May 1st in Hillsboro, OR typically brings mild spring weather, with average highs around 66°F and lows near 41°F — a 25°F daily swing. Over 55 years of records, the warmest May 1st was in 1998 (72°F average), while the coldest was 1988 (44°F) — a 28°F range across recorded history. Rain or other precipitation has occurred on about 38% of May 1st dates historically, with the wettest May 1st recording 1.68" of rain. The last decade has been 2.8°F cooler on this date compared to 20-30 years ago.
The last decade has been 2.8°F cooler on this date compared to 20-30 years ago.
Planning for May 1st in Hillsboro, OR? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Cooling Trend
0.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 83° | 42° | 62° | — | — |
| 2024 | 57° | 35° | 46° | 0.46" | — |
| 2023 | 60° | 47° | 53° | — | — |
| 2022 | 63° | 43° | 53° | — | — |
| 2021 | 62° | 46° | 54° | — | — |
| 2020 | 62° | 35° | 49° | 0.13" | — |
| 2019 | 69° | 33° | 51° | — | — |
| 2018 | 59° | 44° | 52° | — | — |
| 2017 | 53° | 37° | 45° | 0.03" | — |
| 2016 | 81° | 44° | 62° | — | — |
| 2015 | 73° | 46° | 60° | — | — |
| 2014 | 87° | 45° | 66° | — | — |
| 2013 | 70° | 30° | 50° | — | — |
| 2012 | 52° | 37° | 44° | 0.15" | — |
| 2011 | 65° | 32° | 48° | — | — |
| 2010 | 60° | 46° | 53° | — | — |
| 2009 | 69° | 37° | 53° | 0.2" | — |
| 2008 | 59° | 33° | 46° | — | — |
| 2007 | 59° | 45° | 52° | 0.38" | — |
| 2006 | 60° | 37° | 49° | — | — |
| 2005 | 70° | 40° | 55° | 0.33" | — |
| 2004 | 79° | 46° | 62° | — | — |
| 2003 | 64° | 43° | 53° | 0.08" | — |
| 2002 | 65° | 48° | 56° | — | — |
| 2001 | 55° | 37° | 46° | 0.58" | — |
| 2000 | 69° | 49° | 59° | 0.69" | — |
| 1999 | 57° | 46° | 52° | 0.23" | — |
| 1998warmest | 87° | 57° | 72° | 1.12" | — |
| 1997 | 57° | 38° | 47° | 0.05" | — |
| 1996 | 62° | 44° | 53° | — | — |
| 1995 | 58° | 51° | 54° | 0.84" | — |
| 1994 | 62° | 38° | 50° | — | — |
| 1993 | 63° | 45° | 54° | — | — |
| 1992 | 59° | 38° | 48° | — | — |
| 1991 | 72° | 42° | 57° | — | — |
| 1990 | 68° | 36° | 52° | — | — |
| 1989 | 80° | 41° | 61° | 0.05" | — |
| 1988coldest | 55° | 33° | 44° | 0.51" | — |
| 1987 | 62° | 48° | 55° | 0.41" | — |
| 1986 | 66° | 34° | 50° | 0.13" | — |
| 1985 | 72° | 35° | 53° | — | — |
| 1984 | 57° | 44° | 51° | 1.68" | — |
| 1983 | 70° | 46° | 58° | — | — |
| 1982 | 68° | 42° | 55° | — | — |
| 1981 | 81° | 40° | 60° | — | — |
| 1980 | 73° | 39° | 56° | — | — |
| 1979 | 60° | 39° | 50° | — | — |
| 1978 | 67° | 43° | 55° | — | — |
| 1977 | 65° | 45° | 55° | 0.05" | — |
| 1976 | 78° | 46° | 62° | 0.48" | — |
| 1975 | 71° | 38° | 54° | — | — |
| 1974 | 54° | 47° | 50° | — | — |
| 1973 | 75° | 35° | 55° | — | — |
| 1972 | 70° | 34° | 52° | — | — |
| 1971 | 78° | 45° | 61° | — | — |
55 years of data from HILLSBORO