Weather on April 21 at Channel Islands
Channel Islands National Park
Based on 55 years of data from Ventura, CA
Planning Your Visit
April 21st in Channel Islands National Park (via Ventura, CA) typically brings pleasant spring weather, with average highs around 75°F and lows near 44°F — a 31°F daily swing. Over 55 years of records, the warmest April 21st was in 2009 (76°F average), while the coldest was 2010 (46°F) — a 30°F range across recorded history. Rain or other precipitation has occurred on about 4% of April 21st dates historically, with the wettest April 21st recording 4.04" of rain. The last decade has been 2.7°F cooler on this date compared to 20-30 years ago.
The last decade has been 2.7°F cooler on this date compared to 20-30 years ago.
Planning for April 21st in Channel Islands? Great weather for outdoor activities.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 76°F | 40°F | 0" | -- |
| 2024 | 67°F | 48°F | 0" | -- |
| 2023 | 82°F | 44°F | 0" | -- |
| 2022 | 68°F | 38°F | 0" | -- |
| 2021 | 91°F | 36°F | 0" | -- |
| 2020 | 65°F | 41°F | 0" | -- |
| 2019 | 57°F | 47°F | 0" | -- |
| 2018 | 77°F | 38°F | 0" | -- |
| 2017 | 84°F | 43°F | 0" | -- |
| 2016 | 86°F | 38°F | 0" | -- |
| 2015 | 74°F | 44°F | 0" | -- |
| 2014 | 85°F | 44°F | 0" | -- |
| 2013 | 89°F | 43°F | 0" | -- |
| 2012 | 84°F | 52°F | -- | -- |
| 2011 | 63°F | 50°F | -- | -- |
| 2010 | 57°F | 36°F | -- | -- |
| 2009 | 93°F | 59°F | -- | -- |
| 2008 | 64°F | 34°F | -- | -- |
| 2007 | 59°F | 37°F | -- | -- |
| 2006 | 64°F | 48°F | -- | -- |
| 2005 | 73°F | 43°F | -- | -- |
| 2004 | 73°F | 45°F | -- | -- |
| 2003 | 61°F | 41°F | -- | -- |
| 2002 | 72°F | 41°F | -- | -- |
| 2001 | 63°F | 41°F | -- | -- |
| 2000 | 68°F | 49°F | 0" | 0" |
| 1999 | 86°F | 50°F | 0" | 0" |
| 1998 | 94°F | 51°F | 0" | 0" |
| 1997 | 95°F | 56°F | 0" | 0" |
| 1996 | 77°F | 41°F | 0" | 0" |
| 1995 | 68°F | 38°F | 0" | 0" |
| 1994 | 73°F | 53°F | 0" | 0" |
| 1993 | 87°F | 47°F | 0" | 0" |
| 1992 | 80°F | 49°F | 0" | 0" |
| 1991 | 66°F | 49°F | 0" | 0" |
| 1990 | 74°F | 47°F | 0" | 0" |
| 1989 | 77°F | 48°F | 0" | 0" |
| 1988 | 64°F | 42°F | 0" | 0" |
| 1987 | 93°F | 45°F | 0" | 0" |
| 1986 | 87°F | 49°F | 0" | 0" |
| 1985 | 66°F | 44°F | 0" | 0" |
| 1984 | 79°F | 43°F | 0" | 0" |
| 1983 | 66°F | 42°F | 4.04" | 0" |
| 1982 | 84°F | 57°F | 0" | 0" |
| 1981 | 82°F | 45°F | 0" | 0" |
| 1980 | 69°F | 51°F | 0.13" | 0" |
| 1979 | 79°F | 33°F | 0" | 0" |
| 1978 | 68°F | 41°F | 0" | 0" |
| 1977 | 84°F | 41°F | 0" | 0" |
| 1976 | 79°F | 45°F | 0" | 0" |
| 1975 | 71°F | 41°F | 0" | 0" |
| 1974 | 83°F | 36°F | 0" | 0" |
| 1973 | 75°F | 42°F | 0" | 0" |
| 1972 | 76°F | 37°F | 0" | 0" |
| 1971 | 63°F | 37°F | 0" | 0" |