Weather on December 21 at Channel Islands
Channel Islands National Park
Based on 53 years of data from Ventura, CA
Planning Your Visit
December 21st in Channel Islands National Park (via Ventura, CA) typically brings mild winter weather, with average highs around 66°F and lows near 36°F — a 30°F daily swing. Over 53 years of records, the warmest December 21st was in 2005 (62°F average), while the coldest was 1990 (39°F) — a 23°F range across recorded history. Rain or other precipitation has occurred on about 6% of December 21st dates historically, with the wettest December 21st recording 7.92" of rain. The last decade has been 2.1°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.1°F warmer on this date compared to 20-30 years ago.
Planning for December 21st in Channel Islands? Great weather for outdoor activities.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 70°F | 40°F | 0" | -- |
| 2024 | 74°F | 33°F | 0" | -- |
| 2023 | 59°F | 51°F | 7.92" | -- |
| 2022 | 69°F | 32°F | 0" | -- |
| 2021 | 65°F | 33°F | 0" | -- |
| 2020 | 87°F | 32°F | 0" | -- |
| 2019 | 75°F | 35°F | 0" | -- |
| 2017 | 61°F | 26°F | 0" | -- |
| 2016 | 77°F | 32°F | 0" | -- |
| 2015 | 59°F | 30°F | 0" | -- |
| 2014 | 66°F | 43°F | 0" | -- |
| 2013 | 61°F | 32°F | 0" | -- |
| 2012 | 63°F | 28°F | -- | -- |
| 2011 | 63°F | 34°F | -- | -- |
| 2010 | 53°F | 48°F | 0.84" | 0" |
| 2009 | 63°F | 43°F | -- | -- |
| 2008 | 64°F | 36°F | -- | -- |
| 2007 | 54°F | 32°F | -- | -- |
| 2006 | 59°F | 30°F | -- | -- |
| 2005 | 79°F | 46°F | -- | -- |
| 2004 | 64°F | 37°F | -- | -- |
| 2003 | 64°F | 39°F | -- | -- |
| 2002 | 54°F | 37°F | -- | -- |
| 2001 | 55°F | 39°F | -- | -- |
| 2000 | 72°F | 34°F | -- | -- |
| 1999 | 79°F | 36°F | 0" | 0" |
| 1998 | 55°F | 23°F | 0" | 0" |
| 1997 | 69°F | 34°F | 0" | 0" |
| 1995 | 66°F | 32°F | 0" | 0" |
| 1994 | 80°F | 34°F | 0" | 0" |
| 1993 | 72°F | 28°F | 0" | 0" |
| 1992 | 64°F | 28°F | 0" | 0" |
| 1991 | 75°F | 34°F | 0" | 0" |
| 1990 | 47°F | 32°F | 0" | 0" |
| 1989 | 65°F | 33°F | 0" | 0" |
| 1988 | 61°F | 42°F | 3.23" | 0" |
| 1987 | 67°F | 33°F | 0" | 0" |
| 1986 | 72°F | 35°F | 0" | 0" |
| 1985 | 82°F | 36°F | 0" | 0" |
| 1984 | 60°F | 31°F | 0" | 0" |
| 1983 | 62°F | 31°F | 0" | 0" |
| 1982 | 59°F | 34°F | 0" | 0" |
| 1981 | 65°F | 39°F | 0" | 0" |
| 1980 | 77°F | 39°F | 0" | 0" |
| 1979 | 65°F | 48°F | 0" | 0" |
| 1978 | 65°F | 31°F | 0" | 0" |
| 1977 | 69°F | 49°F | 0" | 0" |
| 1976 | 70°F | 33°F | 0" | 0" |
| 1975 | 67°F | 39°F | 0" | 0" |
| 1974 | 71°F | 38°F | 0" | 0" |
| 1973 | 72°F | 38°F | 0" | 0" |
| 1972 | 78°F | 42°F | 0" | 0" |
| 1971 | 59°F | 34°F | 0" | 0" |