San Marcos California Climate Data

Monthly Average Climate Data for San Marcos California

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January43.5 °F67.8 °F2.82 in.
February44.3 °F68.2 °F3.17 in.
March46.8 °F69.1 °F2.23 in.
April49.0 °F72.0 °F1.08 in.
May53.8 °F74.2 °F0.36 in.
June57.4 °F77.8 °F0.08 in.
July61.3 °F82.6 °F0.07 in.
August62.5 °F84.7 °F0.03 in.
September60.3 °F83.6 °F0.18 in.
October54.7 °F79.3 °F0.59 in.
November47.5 °F73.6 °F1.09 in.
December42.6 °F67.4 °F2.22 in.
Annual52 °F75 °F13.92 in.

Climate Data for San Marcos California

Average First Frost DateJan. 11 - Jan. 20
Average Last Frost DateFeb. 1 - Feb. 10
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 ClassificationCsa - Hot-Summer Mediterranean Climate