Weather on September 20 at Channel Islands

Channel Islands National Park

CAPacific West
Avg High84°F
Avg Low51°F
Warmest201278°F
Coldest200756°F

Based on 55 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 84°F and lows near 51°F — a 33°F daily swing. Over 55 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. The last decade has been 1.0°F cooler on this date compared to 20-30 years ago.

The last decade has been 1.0°F cooler on this date compared to 20-30 years ago.

Planning for September 20th in Channel Islands? Stay hydrated and seek shade during peak afternoon hours.

Year by Year History

YearHighLowPrecipSnow
202583°F56°F0"--
202475°F46°F0"--
202379°F51°F0"--
202280°F52°F0"--
202183°F46°F0"--
202088°F47°F0"--
201978°F44°F0"--
201888°F43°F0"--
201777°F49°F0"--
201699°F58°F0"--
201598°F53°F0"--
201483°F54°F0"--
201376°F57°F0"--
201295°F61°F----
201184°F54°F----
201081°F52°F----
200982°F55°F----
200877°F52°F----
200764°F48°F----
200675°F46°F----
200582°F55°F----
200475°F48°F----
200391°F52°F----
200288°F52°F----
200177°F52°F----
200077°F57°F----
199976°F44°F0"0"
199872°F64°F0"--
199784°F48°F0"0"
199688°F56°F0"0"
199590°F55°F0"0"
199484°F50°F0"0"
199378°F51°F0"0"
199293°F50°F0"0"
199192°F55°F0"0"
199076°F50°F0"0"
198987°F--0"0"
198888°F47°F0.2"0"
198794°F49°F0"0"
198674°F44°F0"0"
198585°F43°F0"0"
198486°F61°F0"0"
198387°F62°F0"0"
198287°F50°F0"0"
198192°F52°F0"0"
198077°F41°F0"0"
197992°F--0"0"
197890°F46°F0"0"
197780°F52°F0"0"
197675°F60°F0"0"
197590°F53°F0"0"
197490°F50°F0"0"
197377°F50°F0"0"
197297°F50°F0"0"
197185°F47°F0"0"

September 20 at Nearby Parks

Holiday Weather at Channel Islands

Official NPS WebsiteVisit nps.gov/chis for park information, alerts, and reservations

Explore More at Channel Islands

See historical weather for other dates

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