Weather on September 20 at Channel Islands
Channel Islands National Park
Based on 56 years of data from Ventura, CA
Planning Your Visit
September 20th in Channel Islands National Park (via Ventura, CA) typically brings warm fall weather, with average highs around 83°F and lows near 52°F — a 31°F daily swing. Over 56 years of records, the warmest September 20th was in 2012 (78°F average), while the coldest was 2007 (56°F) — a 22°F range across recorded history. Rain or other precipitation has occurred on about 2% of September 20th dates historically. Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for September 20th in Channel Islands? Stay hydrated and seek shade during peak afternoon hours.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2026 | 74°F | 65°F | 0" | -- |
| 2025 | 83°F | 56°F | 0" | -- |
| 2024 | 75°F | 46°F | 0" | -- |
| 2023 | 79°F | 51°F | 0" | -- |
| 2022 | 80°F | 52°F | 0" | -- |
| 2021 | 83°F | 46°F | 0" | -- |
| 2020 | 88°F | 47°F | 0" | -- |
| 2019 | 78°F | 44°F | 0" | -- |
| 2018 | 88°F | 43°F | 0" | -- |
| 2017 | 77°F | 49°F | 0" | -- |
| 2016 | 99°F | 58°F | 0" | -- |
| 2015 | 98°F | 53°F | 0" | -- |
| 2014 | 83°F | 54°F | 0" | -- |
| 2013 | 76°F | 57°F | 0" | -- |
| 2012 | 95°F | 61°F | -- | -- |
| 2011 | 84°F | 54°F | -- | -- |
| 2010 | 81°F | 52°F | -- | -- |
| 2009 | 82°F | 55°F | -- | -- |
| 2008 | 77°F | 52°F | -- | -- |
| 2007 | 64°F | 48°F | -- | -- |
| 2006 | 75°F | 46°F | -- | -- |
| 2005 | 82°F | 55°F | -- | -- |
| 2004 | 75°F | 48°F | -- | -- |
| 2003 | 91°F | 52°F | -- | -- |
| 2002 | 88°F | 52°F | -- | -- |
| 2001 | 77°F | 52°F | -- | -- |
| 2000 | 77°F | 57°F | -- | -- |
| 1999 | 76°F | 44°F | 0" | 0" |
| 1998 | 72°F | 64°F | 0" | -- |
| 1997 | 84°F | 48°F | 0" | 0" |
| 1996 | 88°F | 56°F | 0" | 0" |
| 1995 | 90°F | 55°F | 0" | 0" |
| 1994 | 84°F | 50°F | 0" | 0" |
| 1993 | 78°F | 51°F | 0" | 0" |
| 1992 | 93°F | 50°F | 0" | 0" |
| 1991 | 92°F | 55°F | 0" | 0" |
| 1990 | 76°F | 50°F | 0" | 0" |
| 1989 | 87°F | -- | 0" | 0" |
| 1988 | 88°F | 47°F | 0.08" | 0" |
| 1987 | 94°F | 49°F | 0" | 0" |
| 1986 | 74°F | 44°F | 0" | 0" |
| 1985 | 85°F | 43°F | 0" | 0" |
| 1984 | 86°F | 61°F | 0" | 0" |
| 1983 | 87°F | 62°F | 0" | 0" |
| 1982 | 87°F | 50°F | 0" | 0" |
| 1981 | 92°F | 52°F | 0" | 0" |
| 1980 | 77°F | 41°F | 0" | 0" |
| 1979 | 92°F | -- | 0" | 0" |
| 1978 | 90°F | 46°F | 0" | 0" |
| 1977 | 80°F | 52°F | 0" | 0" |
| 1976 | 75°F | 60°F | 0" | 0" |
| 1975 | 90°F | 53°F | 0" | 0" |
| 1974 | 90°F | 50°F | 0" | 0" |
| 1973 | 77°F | 50°F | 0" | 0" |
| 1972 | 97°F | 50°F | 0" | 0" |
| 1971 | 85°F | 47°F | 0" | 0" |