Department of Water Resources Home

Flood Management

California State Climatologist

3310 El Camino Avenue
Suite 200
Sacramento, CA 95821

Mailing Address:
P.O. Box 219000
Sacramento, CA 95821-9000

San Joaquin Hydrologic Region


Region Avg Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Avg Temp 44.3 48.5 51.8 56.6 63.7 70.9 76.3 75.4 70.7 62.1 50.8 44.1 59.6
Std Dev T 2.5 2.1 2.8 3.1 3.1 2.3 2.0 1.8 2.4 2.7 2.6 2.6 0.9
Avg Precip 3.90 3.68 3.57 1.47 0.77 0.27 0.90 0.90 0.50 1.12 2.27 2.57 20.30
Std Dev P 2.83 2.63 2.59 1.08 0.82 0.31 0.17 0.17 0.70 0.89 1.80 1.80 7.46
Location: ANTIOCH PUMP PLANT #3
Location: AUBERRY 2 NW
Location: CALAVERAS BIG TREES
Location: CAMP PARDEE
Location: CHERRY VALLEY DAM
Location: COARSEGOLD 1 SW
Location: ELECTRA P H
Location: ELLIOTT
Location: EXCHEQUER DAM
Location: FIDDLETOWN DEXTER RANCH
Location: FRIANT GOVERNMENT CAMP
Location: GROVELAND R S
Location: HETCH HETCHY
Location: HUNTINGTON LAKE
Location: LODI
Location: LOS BANOS
Location: LOS BANOS ARBURUA RANCH
Location: LOS BANOS DET RESV
Location: MADERA
Location: MARIPOSA R S
Location: MATHER
Location: MERCED
Location: MODESTO CITY-COUNTY AP
Location: NEWMAN
Location: NORTH FORK R S
Location: PACIFIC HOUSE
Location: PANOCHE 2 W
Location: SALT SPRINGS PWR HOUSE
Location: SAN LUIS DAM
Location: SONORA RS
Location: SOUTH ENTR YOSEMITE NP
Location: STOCKTON AP
Location: STOCKTON FIRE STN # 4
Location: TIGER CREEK PH
Location: TRACY CARBONA
Location: TRACY PUMPING PLANT
Location: TURLOCK #2
Location: WEST POINT
Location: YOSEMITE PARK HDQTRS