Weather on September 8
Hillsboro, OR
55 Years of Data
Avg High
78°F
Avg Low
49°F
Warmest
1981
76°F avg
Coldest
1978
53°F avg
About This Date
September 8th in Hillsboro, OR typically brings pleasant fall weather, with average highs around 78°F and lows near 49°F — a 29°F daily swing. Over 55 years of records, the warmest September 8th was in 1981 (76°F average), while the coldest was 1978 (53°F) — a 23°F range across recorded history. Rain or other precipitation has occurred on about 20% of September 8th dates historically, with the wettest September 8th recording 1.52" of rain. The last decade has been 4.5°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.5°F warmer on this date compared to 20-30 years ago.
Planning for September 8th in Hillsboro, OR? Great weather for outdoor activities.
Warming Trend
1.0°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 78° | 53° | 66° | 0.3" | — |
| 2024 | 86° | 58° | 72° | — | — |
| 2023 | 78° | 47° | 62° | — | — |
| 2022 | 83° | 42° | 62° | — | — |
| 2021 | 87° | 55° | 71° | — | — |
| 2020 | 81° | 63° | 72° | — | — |
| 2019 | 72° | 58° | 65° | 0.71" | — |
| 2018 | 75° | 56° | 65° | — | — |
| 2017 | 76° | 62° | 69° | — | — |
| 2016 | 75° | 51° | 63° | — | — |
| 2015 | 82° | 48° | 65° | — | — |
| 2014 | 78° | 46° | 62° | — | — |
| 2013 | 85° | 54° | 69° | — | — |
| 2012 | 80° | 50° | 65° | — | — |
| 2011 | 90° | 56° | 73° | — | — |
| 2010 | 66° | 44° | 55° | 0.48" | — |
| 2009 | 73° | 42° | 58° | — | — |
| 2008 | 86° | 48° | 67° | — | — |
| 2007 | 82° | 45° | 63° | — | — |
| 2006 | 80° | 44° | 62° | — | — |
| 2005 | 84° | 49° | 66° | — | — |
| 2004 | 77° | 48° | 63° | — | — |
| 2003 | 67° | 47° | 57° | 0.23" | — |
| 2002 | 70° | 38° | 54° | — | — |
| 2001 | 73° | 47° | 60° | — | — |
| 2000 | 68° | 45° | 56° | 0.25" | — |
| 1999 | 88° | 45° | 66° | — | — |
| 1998 | 71° | 49° | 60° | — | — |
| 1997 | 91° | 53° | 72° | — | — |
| 1996 | 80° | 55° | 68° | — | — |
| 1995 | 80° | 53° | 67° | — | — |
| 1994 | 69° | 52° | 60° | 0.18" | — |
| 1993 | 91° | 55° | 73° | — | — |
| 1992 | 71° | 40° | 55° | — | — |
| 1991 | 71° | 46° | 59° | — | — |
| 1990 | 70° | 61° | 65° | — | — |
| 1989 | 86° | 46° | 66° | — | — |
| 1988 | 76° | 44° | 60° | — | — |
| 1987 | 78° | 54° | 66° | — | — |
| 1986 | 79° | 48° | 63° | — | — |
| 1985 | 69° | 43° | 56° | 0.05" | — |
| 1984 | 74° | 58° | 66° | 0.03" | — |
| 1983 | 71° | 44° | 58° | — | — |
| 1982 | 81° | 53° | 67° | — | — |
| 1981warmest | 100° | 51° | 76° | — | — |
| 1980 | 72° | 43° | 57° | — | — |
| 1979 | 85° | 57° | 71° | 0.28" | — |
| 1978coldest | 61° | 45° | 53° | 0.76" | — |
| 1977 | 74° | 42° | 58° | — | — |
| 1976 | 78° | 40° | 59° | — | — |
| 1975 | 77° | 51° | 64° | — | — |
| 1974 | 70° | 55° | 62° | — | — |
| 1973 | 71° | 41° | 56° | — | — |
| 1972 | 74° | 50° | 62° | 1.52" | — |
| 1971 | 79° | 43° | 61° | — | — |
55 years of data from HILLSBORO