Weather on April 21
Hillsboro, OR
55 Years of Data
Avg High
63°F
Avg Low
41°F
Warmest
1998
64°F avg
Coldest
2008
41°F avg
About This Date
April 21st in Hillsboro, OR typically brings mild spring weather, with average highs around 63°F and lows near 41°F. Over 55 years of records, the warmest April 21st was in 1998 (64°F average), while the coldest was 2008 (41°F) — a 23°F range across recorded history. Rain or other precipitation has occurred on about 45% of April 21st dates historically, with the wettest April 21st recording 1.12" of rain. The last decade has been 1.2°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.2°F cooler on this date compared to 20-30 years ago.
Planning for April 21st in Hillsboro, OR? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 59° | 39° | 49° | 0.1" | — |
| 2024 | 61° | 33° | 47° | — | — |
| 2023 | 56° | 39° | 47° | — | — |
| 2022 | 55° | 44° | 50° | 0.41" | — |
| 2021 | 76° | 39° | 57° | — | — |
| 2020 | 61° | 44° | 52° | — | — |
| 2019 | 62° | 38° | 50° | — | — |
| 2018 | 62° | 42° | 52° | — | — |
| 2017 | 70° | 35° | 52° | — | — |
| 2016 | 75° | 47° | 61° | 0.66" | — |
| 2015 | 63° | 40° | 51° | — | — |
| 2014 | 63° | 45° | 54° | 0.69" | — |
| 2013 | 54° | 39° | 46° | — | — |
| 2012 | 74° | 39° | 56° | — | — |
| 2011 | 54° | 34° | 44° | 0.05" | — |
| 2010 | 57° | 41° | 49° | — | — |
| 2009 | 81° | 41° | 61° | — | — |
| 2008coldest | 46° | 36° | 41° | 0.89" | — |
| 2007 | 51° | 41° | 46° | 0.63" | — |
| 2006 | 59° | 39° | 49° | — | — |
| 2005 | 69° | 40° | 54° | — | — |
| 2004 | 58° | 42° | 50° | 0.56" | — |
| 2003 | 63° | 46° | 54° | 0.97" | — |
| 2002 | 60° | 36° | 48° | — | — |
| 2001 | 63° | 33° | 48° | 0.03" | — |
| 2000 | 72° | 51° | 61° | 0.2" | — |
| 1999 | 57° | 39° | 48° | 0.38" | — |
| 1998warmest | 75° | 53° | 64° | — | — |
| 1997 | 64° | 41° | 53° | 0.03" | — |
| 1996 | 53° | 44° | 49° | 1.12" | — |
| 1995 | 60° | 36° | 48° | — | — |
| 1994 | 72° | 44° | 58° | — | — |
| 1993 | 71° | 46° | 59° | 0.97" | — |
| 1992 | 65° | 43° | 54° | — | — |
| 1991 | 75° | 49° | 62° | — | — |
| 1990 | 62° | 43° | 52° | 0.03" | — |
| 1989 | 61° | 41° | 51° | — | — |
| 1988 | 58° | 49° | 53° | 0.08" | — |
| 1987 | 67° | 35° | 51° | — | — |
| 1986 | 78° | 46° | 62° | — | — |
| 1985 | 50° | 39° | 45° | 0.36" | — |
| 1984 | 61° | 43° | 52° | 0.03" | — |
| 1983 | 69° | 47° | 58° | 0.05" | — |
| 1982 | 66° | 37° | 52° | — | — |
| 1981 | 58° | 45° | 51° | 0.28" | — |
| 1980 | 55° | 47° | 51° | 0.36" | — |
| 1979 | 71° | 42° | 57° | — | — |
| 1978 | 54° | 39° | 46° | 0.84" | — |
| 1977 | 57° | 49° | 53° | 0.13" | — |
| 1976 | 57° | 32° | 45° | — | — |
| 1975 | 67° | 34° | 50° | — | — |
| 1974 | 69° | 41° | 55° | — | — |
| 1973 | 69° | 34° | 51° | — | — |
| 1972 | 53° | 35° | 44° | 0.05" | — |
| 1971 | 51° | 33° | 42° | — | — |
55 years of data from HILLSBORO