Weather on October 21
Hillsboro, OR
55 Years of Data
Avg High
62°F
Avg Low
41°F
Warmest
2003
70°F avg
Coldest
1984
43°F avg
About This Date
October 21st in Hillsboro, OR typically brings mild fall weather, with average highs around 62°F and lows near 41°F. Over 55 years of records, the warmest October 21st was in 2003 (70°F average), while the coldest was 1984 (43°F) — a 27°F range across recorded history. Rain or other precipitation has occurred on about 45% of October 21st dates historically, with the wettest October 21st recording 5.18" of rain. The last decade has been 2.0°F cooler on this date compared to 20-30 years ago.
The last decade has been 2.0°F cooler on this date compared to 20-30 years ago.
Planning for October 21st in Hillsboro, OR? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Warming Trend
0.7°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 66° | 37° | 52° | — | — |
| 2024 | 60° | 42° | 51° | 0.13" | — |
| 2023 | 59° | 49° | 54° | — | — |
| 2022 | 53° | 40° | 46° | 0.99" | — |
| 2021 | 67° | 44° | 55° | 1.63" | — |
| 2020 | 59° | 36° | 47° | — | — |
| 2019 | 61° | 48° | 54° | — | — |
| 2018 | 70° | 35° | 52° | — | — |
| 2017 | 60° | 45° | 52° | 5.18" | — |
| 2016 | 61° | 46° | 53° | 0.76" | — |
| 2015 | 64° | 42° | 53° | — | — |
| 2014 | 60° | 53° | 57° | 0.18" | — |
| 2013 | 75° | 38° | 56° | — | — |
| 2012 | 53° | 37° | 45° | 0.05" | — |
| 2011 | 61° | 48° | 54° | — | — |
| 2010 | 60° | 36° | 48° | — | — |
| 2009 | 65° | 48° | 56° | 0.81" | — |
| 2008 | 54° | 33° | 43° | — | — |
| 2007 | 55° | 43° | 49° | — | — |
| 2006 | 70° | 35° | 52° | — | — |
| 2005 | 72° | 42° | 57° | — | — |
| 2004 | 60° | 42° | 51° | 0.15" | — |
| 2003warmest | 80° | 60° | 70° | — | — |
| 2002 | 64° | 53° | 59° | 0.03" | — |
| 2001 | 55° | 35° | 45° | 0.03" | — |
| 2000 | 56° | 37° | 46° | 0.1" | — |
| 1999 | 70° | 39° | 54° | — | — |
| 1998 | 75° | 42° | 59° | — | — |
| 1997 | 63° | 37° | 50° | — | — |
| 1996 | 53° | 37° | 45° | 0.81" | — |
| 1995 | 57° | 39° | 48° | 0.48" | — |
| 1994 | 64° | 34° | 49° | 0.05" | — |
| 1993 | 70° | 39° | 54° | — | — |
| 1992 | 58° | 51° | 54° | 1.12" | — |
| 1991 | 72° | 45° | 58° | — | — |
| 1990 | 56° | 36° | 46° | 0.81" | — |
| 1989 | 65° | 48° | 56° | 1.22" | — |
| 1988 | 67° | 40° | 53° | — | — |
| 1987 | 74° | 36° | 55° | — | — |
| 1986 | 65° | 36° | 50° | — | — |
| 1985 | 59° | 43° | 51° | 1.57" | — |
| 1984coldest | 50° | 36° | 43° | 0.25" | — |
| 1983 | 64° | 42° | 53° | — | — |
| 1982 | 58° | 32° | 45° | 0.18" | — |
| 1981 | 64° | 35° | 50° | — | — |
| 1980 | 61° | 34° | 47° | — | — |
| 1979 | 54° | 41° | 47° | 0.1" | — |
| 1978 | 60° | 32° | 46° | — | — |
| 1977 | 67° | 45° | 56° | — | — |
| 1976 | 66° | 30° | 48° | — | — |
| 1975 | 56° | 42° | 49° | 1.35" | — |
| 1974 | 58° | 33° | 45° | — | — |
| 1973 | 60° | 50° | 55° | 0.61" | — |
| 1972 | 58° | 47° | 52° | 0.43" | — |
| 1971 | 55° | 34° | 44° | — | — |
55 years of data from HILLSBORO