Weather on March 21 at Channel Islands
Channel Islands National Park
Based on 55 years of data from Ventura, CA
Planning Your Visit
March 21st in Channel Islands National Park (via Ventura, CA) typically brings pleasant spring weather, with average highs around 70°F and lows near 43°F — a 27°F daily swing. Over 55 years of records, the warmest March 21st was in 2026 (72°F average), while the coldest was 1973 (44°F) — a 28°F range across recorded history. Rain or other precipitation has occurred on about 22% of March 21st dates historically, with the wettest March 21st recording 3.05" of rain. The last decade has been 2.3°F cooler on this date compared to 20-30 years ago.
The last decade has been 2.3°F cooler on this date compared to 20-30 years ago.
Planning for March 21st in Channel Islands? Great weather for outdoor activities.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2026 | 96°F | 49°F | 0" | -- |
| 2025 | 73°F | 38°F | 0" | -- |
| 2024 | 75°F | 39°F | 0" | -- |
| 2023 | 60°F | 43°F | 2.03" | -- |
| 2022 | 76°F | 42°F | 0" | -- |
| 2021 | 68°F | 29°F | 0" | -- |
| 2020 | 60°F | 44°F | 0" | -- |
| 2019 | 61°F | 38°F | 0.33" | -- |
| 2018 | 68°F | 49°F | 1.47" | -- |
| 2017 | 70°F | 49°F | 0.33" | -- |
| 2016 | 73°F | 46°F | 0" | -- |
| 2015 | 85°F | 43°F | 0" | -- |
| 2014 | 64°F | 54°F | 0" | -- |
| 2013 | 79°F | 44°F | 0" | -- |
| 2012 | 73°F | 39°F | -- | -- |
| 2011 | 54°F | 39°F | -- | -- |
| 2010 | 75°F | 45°F | -- | -- |
| 2009 | 55°F | 50°F | -- | -- |
| 2008 | 79°F | 41°F | -- | -- |
| 2007 | 59°F | 45°F | -- | -- |
| 2006 | 57°F | 34°F | -- | -- |
| 2005 | 64°F | 41°F | -- | -- |
| 2004 | 77°F | 50°F | -- | -- |
| 2003 | 73°F | 45°F | -- | -- |
| 2002 | 77°F | 45°F | -- | -- |
| 2001 | 66°F | 48°F | -- | -- |
| 2000 | -- | 38°F | 0" | 0" |
| 1999 | 69°F | 40°F | 0.13" | 0" |
| 1998 | 80°F | 45°F | 0" | 0" |
| 1997 | 80°F | 41°F | 0" | 0" |
| 1996 | 70°F | 45°F | 0" | 0" |
| 1995 | 61°F | 49°F | 1.24" | 0" |
| 1994 | 71°F | 44°F | 0" | 0" |
| 1993 | 76°F | 41°F | 0" | 0" |
| 1992 | 62°F | 48°F | 3.05" | 0" |
| 1991 | 62°F | 32°F | 0" | 0" |
| 1990 | 85°F | 46°F | 0" | 0" |
| 1989 | 82°F | 39°F | 0" | 0" |
| 1988 | 83°F | 46°F | 0" | 0" |
| 1986 | 84°F | 44°F | 0" | 0" |
| 1985 | 76°F | 41°F | 0" | 0" |
| 1984 | 74°F | 45°F | 0" | 0" |
| 1983 | 61°F | 41°F | 2.54" | 0" |
| 1982 | 68°F | 32°F | 0" | 0" |
| 1981 | 61°F | 41°F | 0.1" | 0" |
| 1980 | 68°F | 38°F | 0" | 0" |
| 1979 | 57°F | 42°F | 0.25" | 0" |
| 1978 | 67°F | 54°F | 0.71" | 0" |
| 1977 | 84°F | 39°F | 0" | 0" |
| 1976 | 86°F | 40°F | 0" | 0" |
| 1975 | 61°F | 45°F | 0" | 0" |
| 1974 | 61°F | 49°F | 0" | 0" |
| 1973 | 56°F | 33°F | 0.64" | 0" |
| 1972 | 72°F | 49°F | 0" | 0" |
| 1971 | 68°F | 41°F | 0" | 0" |