Diablo Grande California Climate Data

Monthly Average Climate Data for Diablo Grande California

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January4.7 °C12.7 °C84.84 mm
February5.9 °C14.5 °C76.71 mm
March7.1 °C17.3 °C53.59 mm
April8.4 °C20.4 °C21.08 mm
May11.3 °C24.9 °C14.73 mm
June14.3 °C29.3 °C2.29 mm
July17 °C33.2 °C0 mm
August16.7 °C32.9 °C0.51 mm
September15.3 °C30.4 °C2.03 mm
October11.9 °C24.9 °C17.02 mm
November7.6 °C17.7 °C32.26 mm
December4.6 °C12.9 °C67.06 mm
Annual10.4 °C22.6 °C372.12 mm

Climate Data for Diablo Grande California

Average First Frost DateNov. 21 - Nov. 30
Average Last Frost DateMar. 1 - Mar. 10
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 ConditionsAbnormally Dry
Köppen Climate ClassificationBSk - Cold Semi-Arid Climate
2025 plantmaps.com