Weather on August 21 at Channel Islands

Channel Islands National Park

CAPacific West
Avg High88°F
Avg Low55°F
Warmest198684°F
Coldest200263°F

Based on 55 years of data from Ventura, CA

Planning Your Visit

August 21st in Channel Islands National Park (via Ventura, CA) typically brings warm summer weather, with average highs around 88°F and lows near 55°F — a 33°F daily swing. Over 55 years of records, the warmest August 21st was in 1986 (84°F average), while the coldest was 2002 (63°F) — a 21°F range across recorded history. Rain or other precipitation has occurred on about 2% of August 21st dates historically, with the wettest August 21st recording 4.88" of rain. The last decade has been 3.6°F warmer on this date compared to 20-30 years ago.

The last decade has been 3.6°F warmer on this date compared to 20-30 years ago.

Planning for August 21st in Channel Islands? Stay hydrated and seek shade during peak afternoon hours.

Year by Year History

YearHighLowPrecipSnow
202598°F56°F0"--
202489°F50°F0"--
202377°F62°F4.88"--
202287°F57°F0"--
202182°F54°F0"--
2020104°F60°F0"--
201992°F51°F0"--
201888°F63°F0"--
201784°F56°F0"--
201692°F52°F0"--
201582°F55°F0"--
201490°F54°F0"--
201396°F51°F0"--
201293°F62°F0"--
201179°F54°F----
201091°F57°F----
200990°F55°F----
200882°F57°F----
200790°F57°F----
200688°F50°F----
200590°F50°F----
200475°F57°F----
200381°F61°F----
200272°F54°F----
200175°F54°F----
200081°F54°F----
199998°F50°F0"0"
199895°F51°F0"0"
199793°F56°F0"0"
1996--51°F0"0"
199593°F60°F0"0"
199488°F57°F0"0"
199389°F52°F0"0"
199288°F58°F0"0"
199199°F51°F0"0"
199081°F51°F0"0"
198978°F52°F0"0"
198881°F51°F0"0"
198784°F50°F0"0"
198696°F72°F0"0"
198587°F45°F0"0"
198488°F60°F0"0"
198377°F57°F0"0"
1982104°F62°F0"0"
198199°F50°F0"0"
198083°F46°F0"0"
197985°F47°F0"0"
197884°F47°F0"0"
197796°F62°F0"0"
197686°F54°F0"0"
197576°F54°F0"0"
197482°F51°F0"0"
197389°F64°F0"0"
197296°F57°F0"0"
197183°F58°F0"0"

August 21 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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