🌷 Your Ultimate Garden Calendar!

Weather Almanac: Saint Helena, CA 94574

🗓️ Historical norms for December

November January
Jan. Feb. Mar. Apr. May. Jun. Jul. Aug. Sep. Oct. Nov. Dec.
December avg. precipitation
🌧️ 8.09"
December days below freezing
📉 ≈4.0 days
Average December lows 36°F – 42°F
USDA Zone
9b
Annual extreme lows 25°F to 30°F
Last Spring Frost (36°F)
🌷 May 12
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First Fall Frost (36°F)
🍂 Nov 6
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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: ANGWIN PAC UNION COL (USC00040212)

Precipitation climatic data from weather station: ANGWIN PAC UNION COL (USC00040212)

Agricultural climatic data from weather station: ANGWIN PAC UNION COL (USC00040212)