Avg. Humidity: 61%
Humidity & Mold in California
California humidity varies enormously — foggy San Francisco averages 75% RH while inland Bakersfield stays below 40%. Winter atmospheric rivers now cause severe water intrusion.
61%
Avg. Humidity
Mediterranean (coast) / Desert (south) / Alpine (mountains)
Climate
Variable
Humidity Level
39.0M
Population
Top Moisture Issues in California
Coastal fog and salt-air moisture
Post-rain mold
Bathroom mildew
Crawl space moisture in NorCal
Expert Tips for California Homeowners
1
Coastal homes: check crawl spaces annually
2
Post-atmospheric-river drying protocols
3
Vent bathrooms outdoors
4
Dehumidify basements in NorCal winter
