Weather on May 23
Hillsboro, OR
55 Years of Data
Avg High
68°F
Avg Low
46°F
Warmest
1999
74°F avg
Coldest
1978
47°F avg
About This Date
May 23rd in Hillsboro, OR typically brings mild spring weather, with average highs around 68°F and lows near 46°F. Over 55 years of records, the warmest May 23rd was in 1999 (74°F average), while the coldest was 1978 (47°F) — a 27°F range across recorded history. Rain or other precipitation has occurred on about 44% of May 23rd dates historically, with the wettest May 23rd recording 1.75" of rain. The last decade has been 1.4°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.4°F cooler on this date compared to 20-30 years ago.
Planning for May 23rd in Hillsboro, OR? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Warming Trend
0.3°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 69° | 46° | 58° | — | — |
| 2024 | 63° | 37° | 50° | — | — |
| 2023 | 66° | 42° | 54° | — | — |
| 2022 | 71° | 47° | 59° | — | — |
| 2021 | 67° | 50° | 58° | — | — |
| 2020 | 63° | 44° | 53° | — | — |
| 2019 | 80° | 49° | 64° | — | — |
| 2018 | 82° | 52° | 67° | — | — |
| 2017 | 85° | 49° | 67° | — | — |
| 2016 | 66° | 50° | 58° | 0.03" | — |
| 2015 | 63° | 53° | 58° | — | — |
| 2014 | 70° | 53° | 61° | 0.03" | — |
| 2013 | 52° | 45° | 48° | 1.75" | — |
| 2012 | 62° | 46° | 54° | 0.13" | — |
| 2011 | 58° | 42° | 50° | 0.28" | — |
| 2010 | 57° | 38° | 47° | 0.2" | — |
| 2009 | 75° | 42° | 59° | — | — |
| 2008 | 57° | 48° | 53° | 0.2" | — |
| 2007 | 73° | 39° | 56° | 0.08" | — |
| 2006 | 64° | 51° | 58° | 1.19" | — |
| 2005 | 65° | 37° | 51° | — | — |
| 2004 | 65° | 46° | 55° | 0.13" | — |
| 2003 | 77° | 55° | 66° | — | — |
| 2002 | 62° | 44° | 53° | 0.2" | — |
| 2001 | 92° | 50° | 71° | — | — |
| 2000 | 72° | 54° | 63° | — | — |
| 1999warmest | 91° | 57° | 74° | — | — |
| 1998 | 66° | 56° | 61° | 0.64" | — |
| 1997 | 64° | 49° | 56° | 0.05" | — |
| 1996 | 59° | 45° | 52° | 0.05" | — |
| 1995 | 78° | 46° | 62° | — | — |
| 1994 | 75° | 48° | 62° | — | — |
| 1993 | 69° | 49° | 59° | — | — |
| 1992 | 80° | 42° | 61° | — | — |
| 1991 | 64° | 40° | 52° | — | — |
| 1990 | 62° | 48° | 55° | 1.7" | — |
| 1989 | 64° | 43° | 53° | 0.81" | — |
| 1988 | 69° | 39° | 54° | 0.1" | — |
| 1987 | 69° | 42° | 56° | — | — |
| 1986 | 61° | 41° | 51° | — | — |
| 1985 | 84° | 51° | 68° | 0.08" | — |
| 1984 | 54° | 41° | 47° | 1.6" | — |
| 1983 | 86° | 49° | 67° | — | — |
| 1982 | 68° | 41° | 55° | — | — |
| 1981 | 72° | 50° | 61° | — | — |
| 1980 | 59° | 44° | 52° | 0.41" | — |
| 1979 | 74° | 52° | 63° | — | — |
| 1978coldest | 59° | 36° | 47° | — | — |
| 1977 | 58° | 46° | 52° | 0.61" | — |
| 1976 | 62° | 49° | 55° | 1.02" | — |
| 1975 | 62° | 48° | 55° | 0.05" | — |
| 1974 | 61° | 48° | 54° | — | — |
| 1973 | 62° | 55° | 59° | 0.74" | — |
| 1972 | 59° | 45° | 52° | — | — |
| 1971 | 77° | 40° | 58° | — | — |
55 years of data from HILLSBORO