San Bruno California Climate Data

Monthly Average Climate Data for San Bruno California

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January44.4 °F58.0 °F4.32 in.
February45.9 °F60.3 °F4.42 in.
March47.5 °F62.5 °F3.17 in.
April48.7 °F63.8 °F1.62 in.
May51.7 °F65.9 °F0.6 in.
June53.7 °F68.7 °F0.16 in.
July55.6 °F70.0 °F0.06 in.
August56.4 °F70.8 °F0.05 in.
September55.9 °F73.5 °F0.08 in.
October53.3 °F71.4 °F0.87 in.
November48.2 °F63.5 °F2.03 in.
December44.4 °F58.2 °F4.3 in.
Annual50.5 °F65.6 °F21.68 in.

Climate Data for San Bruno California

Average First Frost DateNo Frost
Average Last Frost Date
Average Days With FrostFrost Free
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