🌷 Your Ultimate Garden Calendar!

Weather Almanac: Diablo, CA 94528

🗓️ Historical norms for December

November January
Jan. Feb. Mar. Apr. May. Jun. Jul. Aug. Sep. Oct. Nov. Dec.
December avg. precipitation
🌧️ 4.39"
December days below freezing
📉 ≈3.3 days
Average December lows 38°F – 42°F
USDA Zone
9b
Annual extreme lows 25°F to 30°F
Last Spring Frost (36°F)
🌷 Mar 5
View full details
First Fall Frost (36°F)
🍂 Nov 22
View full details

Book Recommendations (ads!)

📚 Month-by-Month Gardening California: What to Do Each Month to Have a Beautiful Garden All Year

📚 Pacific Northwest Month-by-Month Gardening: What to Do Each Month to Have a Beautiful Garden All Year

📚 California Gardener's Handbook: Your Complete Guide: Select - Plan - Plant - Maintain - Problem-solve

F: Forecast
H: Normal High Temp
L: Normal Low Temp
Jan. Feb. Mar. Apr. May. Jun. Jul. Aug. Sep. Oct. Nov. Dec.

Temperature climatic data from weather station: MT DIABLO JUNCTION (USC00045915)

Precipitation climatic data from weather station: MT DIABLO JUNCTION (USC00045915)

Agricultural climatic data from weather station: CONCORD BUCHANAN FLD (USW00023254)