Weather on August 23
Hillsboro, OR
55 Years of Data
Avg High
80°F
Avg Low
50°F
Warmest
2025
80°F avg
Coldest
1973
53°F avg
About This Date
August 23rd in Hillsboro, OR typically brings warm summer weather, with average highs around 80°F and lows near 50°F — a 30°F daily swing. Over 55 years of records, the warmest August 23rd was in 2025 (80°F average), while the coldest was 1973 (53°F) — a 27°F range across recorded history. Rain or other precipitation has occurred on about 20% of August 23rd dates historically, with the wettest August 23rd recording 2.79" 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 August 23rd in Hillsboro, OR? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025warmest | 101° | 59° | 80° | — | — |
| 2024 | 66° | 52° | 59° | 0.89" | — |
| 2023 | 77° | 47° | 62° | — | — |
| 2022 | 86° | 55° | 71° | — | — |
| 2021 | 75° | 40° | 57° | — | — |
| 2020 | 84° | 50° | 67° | — | — |
| 2019 | 84° | 48° | 66° | — | — |
| 2018 | 74° | 49° | 61° | — | — |
| 2017 | 85° | 56° | 70° | — | — |
| 2016 | 85° | 46° | 65° | — | — |
| 2015 | 89° | 51° | 70° | — | — |
| 2014 | 88° | 52° | 70° | — | — |
| 2013 | 76° | 57° | 66° | 0.03" | — |
| 2012 | 73° | 47° | 60° | — | — |
| 2011 | 84° | 63° | 73° | — | — |
| 2010 | 79° | 41° | 60° | — | — |
| 2009 | 73° | 44° | 59° | — | — |
| 2008 | 85° | 51° | 68° | — | — |
| 2007 | 84° | 50° | 67° | — | — |
| 2006 | 73° | 50° | 62° | — | — |
| 2005 | 72° | 47° | 59° | — | — |
| 2004 | 68° | 54° | 61° | 0.53" | — |
| 2003 | 76° | 45° | 60° | — | — |
| 2002 | 86° | 48° | 67° | — | — |
| 2001 | 66° | 53° | 60° | 1.24" | — |
| 2000 | 89° | 51° | 70° | — | — |
| 1999 | 90° | 50° | 70° | — | — |
| 1998 | 71° | 51° | 61° | — | — |
| 1997 | 88° | 55° | 71° | 0.51" | — |
| 1996 | 97° | 54° | 75° | — | — |
| 1995 | 73° | 47° | 60° | — | — |
| 1994 | 76° | 50° | 63° | — | — |
| 1993 | 87° | 53° | 70° | — | — |
| 1992 | 69° | 51° | 60° | — | — |
| 1991 | 87° | 56° | 71° | — | — |
| 1990 | 73° | 49° | 61° | 0.05" | — |
| 1989 | 69° | 50° | 60° | 0.15" | — |
| 1988 | 92° | 45° | 68° | — | — |
| 1987 | 90° | 48° | 69° | — | — |
| 1986 | 90° | 51° | 70° | — | — |
| 1985 | 85° | 50° | 67° | — | — |
| 1984 | 79° | 53° | 66° | — | — |
| 1983 | 78° | 51° | 65° | — | — |
| 1982 | 91° | 52° | 71° | — | — |
| 1981 | 89° | 49° | 69° | — | — |
| 1980 | 80° | 44° | 62° | — | — |
| 1979 | 79° | 51° | 65° | — | — |
| 1978 | 67° | 50° | 58° | 0.18" | — |
| 1977 | 65° | 54° | 59° | 2.79" | — |
| 1976 | 77° | 56° | 66° | — | — |
| 1975 | 70° | 53° | 61° | 1.52" | — |
| 1974 | 77° | 51° | 64° | — | — |
| 1973coldest | 65° | 42° | 53° | 0.03" | — |
| 1972 | 85° | 51° | 68° | — | — |
| 1971 | 81° | 44° | 62° | — | — |
55 years of data from HILLSBORO