San Marcos California Climate Data

Monthly Average Climate Data for San Marcos California

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January6.4 °C19.9 °C71.63 mm
February6.8 °C20.1 °C80.52 mm
March8.2 °C20.6 °C56.64 mm
April9.4 °C22.2 °C27.43 mm
May12.1 °C23.4 °C9.14 mm
June14.1 °C25.4 °C2.03 mm
July16.3 °C28.1 °C1.78 mm
August16.9 °C29.3 °C0.76 mm
September15.7 °C28.7 °C4.57 mm
October12.6 °C26.3 °C14.99 mm
November8.6 °C23.1 °C27.69 mm
December5.9 °C19.7 °C56.39 mm
Annual11.1 °C23.9 °C353.57 mm

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 : -1.1°C to 1.7°C
Plant Hardiness Zone - 2012Zone 10a : -1.1°C to 1.7°C
Current Drought ConditionsNormal
Köppen Climate ClassificationCsa - Hot-Summer Mediterranean Climate
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