Weather on August 9
Hillsboro, OR
55 Years of Data
Avg High
85°F
Avg Low
54°F
Warmest
1981
83°F avg
Coldest
2010
57°F avg
About This Date
August 9th in Hillsboro, OR typically brings warm summer weather, with average highs around 85°F and lows near 54°F — a 31°F daily swing. Over 55 years of records, the warmest August 9th was in 1981 (83°F average), while the coldest was 2010 (57°F) — a 26°F range across recorded history. Rain or other precipitation has occurred on about 4% of August 9th dates historically. 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 9th in Hillsboro, OR? Stay hydrated and seek shade during peak afternoon hours.
Cooling Trend
0.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 87° | 56° | 71° | — | — |
| 2024 | 85° | 59° | 72° | — | — |
| 2023 | 82° | 56° | 69° | — | — |
| 2022 | 87° | 59° | 73° | — | — |
| 2021 | 86° | 50° | 68° | — | — |
| 2020 | 84° | 51° | 68° | — | — |
| 2019 | 78° | 61° | 69° | 0.23" | — |
| 2018 | 97° | 59° | 78° | — | — |
| 2017 | 96° | 58° | 77° | — | — |
| 2016 | 70° | 54° | 62° | — | — |
| 2015 | 85° | 50° | 67° | — | — |
| 2014 | 85° | 48° | 66° | — | — |
| 2013 | 82° | 55° | 69° | — | — |
| 2012 | 81° | 50° | 65° | — | — |
| 2011 | 70° | 51° | 60° | — | — |
| 2010coldest | 68° | 46° | 57° | — | — |
| 2009 | 79° | 55° | 67° | — | — |
| 2008 | 72° | 50° | 61° | 0.3" | — |
| 2007 | 75° | 54° | 64° | — | — |
| 2006 | 79° | 60° | 69° | — | — |
| 2005 | 85° | 47° | 66° | — | — |
| 2004 | 99° | 55° | 77° | — | — |
| 2003 | 78° | 60° | 69° | — | — |
| 2002 | 89° | 49° | 69° | — | — |
| 2001 | 87° | 55° | 71° | — | — |
| 2000 | 82° | 53° | 68° | — | — |
| 1999 | 86° | 51° | 69° | — | — |
| 1998 | 85° | 56° | 70° | — | — |
| 1997 | 88° | 54° | 71° | — | — |
| 1996 | 101° | 60° | 80° | — | — |
| 1995 | 86° | 54° | 70° | — | — |
| 1994 | 80° | 52° | 66° | — | — |
| 1993 | 76° | 56° | 66° | — | — |
| 1992 | 77° | 47° | 62° | — | — |
| 1991 | 89° | 63° | 76° | — | — |
| 1990 | 89° | 57° | 73° | — | — |
| 1989 | 82° | 51° | 67° | — | — |
| 1988 | 84° | 49° | 66° | — | — |
| 1987 | 100° | 57° | 79° | — | — |
| 1986 | 96° | 57° | 77° | — | — |
| 1985 | 75° | 49° | 62° | — | — |
| 1984 | 96° | 55° | 76° | — | — |
| 1983 | 77° | 54° | 65° | — | — |
| 1982 | 83° | 57° | 70° | — | — |
| 1981warmest | 104° | 62° | 83° | — | — |
| 1980 | 84° | 49° | 66° | — | — |
| 1979 | 87° | 48° | 68° | — | — |
| 1978 | 97° | 53° | 75° | — | — |
| 1977 | 99° | 52° | 75° | — | — |
| 1976 | 73° | 53° | 63° | — | — |
| 1975 | 81° | 44° | 62° | — | — |
| 1974 | 90° | 50° | 70° | — | — |
| 1973 | 82° | 55° | 69° | — | — |
| 1972 | 91° | 58° | 74° | — | — |
| 1971 | 103° | 56° | 79° | — | — |
55 years of data from HILLSBORO