Based on 64,114 research-grade iNaturalist observations in California, Monarch is most often recorded in July; in California it behaves like a year-round resident. It ranks #1 among butterflies recorded in the state in our data.
Danaus plexippus
Monarch 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 July
Gray Buckeye
Fiery Skipper
Small White
Western Tiger Swallowtail
Gray Hairstreak
Acmon Blue
Anise Swallowtail
Marine Blue
Places to look in California
Botanical GardenThe Huntington Library, Art Museum, and Botanical Gardens
State ParkHearst Castle
Botanical GardenSan Francisco Botanical Garden
State ParkAnza-Borrego Desert State Park
National ForestAngeles National Forest
National ForestSequoia National Forest
FAQ
When does Monarch appear in California?
Mainly June–May, with the most records in July.
How common is Monarch in California?
It ranks #1 by number of iNaturalist observations among butterflies in California (64,114 records in our sample).