Based on 17,901 research-grade iNaturalist observations in California, Hooded Oriole is most often recorded in April; in California it behaves like a summer visitor / breeder. It ranks #64 among birds recorded in the state in our data.
Icterus cucullatus
Hooded Oriole in California by month
Bars show research-grade observations per month. They mix true seasonality with how often people are outdoors, so treat small numbers with caution.
Also seen in California in April

Mallard
House Finch
Anna's Hummingbird
Canada Goose

California Towhee

Mourning Dove

Red-tailed Hawk
California Scrub-Jay
Places to look in California
Botanical GardenThe Huntington Library, Art Museum, and Botanical Gardens
State ParkHearst Castle
Botanical GardenSan Francisco Botanical Garden
Anza-Borrego Desert State Park
Angeles National Forest
National ForestSequoia National Forest
FAQ
When does Hooded Oriole appear in California?
Mainly March–August, with the most records in April.
How common is Hooded Oriole in California?
It ranks #64 by number of iNaturalist observations among birds in California (17,901 records in our sample).