San Mateo California Climate Data

Monthly Average Climate Data for San Mateo California

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January43.6 °F58.1 °F3.97 in.
February45.4 °F60.6 °F4.04 in.
March46.9 °F63.1 °F3.03 in.
April48.1 °F66.1 °F1.53 in.
May51.2 °F68.7 °F0.61 in.
June53.7 °F72.8 °F0.16 in.
July55.8 °F75.1 °F0.04 in.
August56.2 °F75.6 °F0.04 in.
September55.7 °F76.3 °F0.07 in.
October52.9 °F72.6 °F0.88 in.
November47.6 °F63.8 °F1.91 in.
December43.5 °F58.3 °F4.13 in.
Annual50.1 °F67.6 °F20.41 in.

Climate Data for San Mateo California

Average First Frost DateJan. 11 - Jan. 20
Average Last Frost DateJan. 21 - Jan. 31
Average Days With FrostFrost Rare
Plant Hardiness Zone - 2023Zone 10a : 30°F to 25°F
Plant Hardiness Zone - 2012Zone 10a : 30°F to 25°F
Current Drought ConditionsNormal
Köppen Climate ClassificationCsb - Warm-Summer Mediterranean Climate