Atherton California Climate Data

Monthly Average Climate Data for Atherton California

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January5.6 °C14.7 °C94.23 mm
February6.6 °C16.2 °C96.77 mm
March7.6 °C17.9 °C68.07 mm
April8.5 °C19.9 °C33.02 mm
May10.4 °C22.1 °C11.94 mm
June12 °C24.8 °C3.3 mm
July13.4 °C25.8 °C0 mm
August13.4 °C25.8 °C0.76 mm
September12.9 °C25.7 °C1.78 mm
October10.8 °C23.2 °C18.54 mm
November7.6 °C18.1 °C43.18 mm
December5.4 °C14.8 °C94.49 mm
Annual9.5 °C20.8 °C466.08 mm

Climate Data for Atherton California

Average First Frost DateDec. 21 - Dec. 31
Average Last Frost DateFeb. 11 - Feb. 20
Average Days With Frost5-10 Days
Plant Hardiness Zone - 2023Zone 9b : -3.9°C to -1.1°C
Plant Hardiness Zone - 2012Zone 9b : -3.9°C to -1.1°C
Current Drought ConditionsNormal
Köppen Climate ClassificationCsb - Warm-Summer Mediterranean Climate
2024 plantmaps.com