🌷 Your Ultimate Garden Calendar!

Weather Almanac: Walnut, CA 91789

🗓️ Historical norms for September

August October
Jan. Feb. Mar. Apr. May. Jun. Jul. Aug. Sep. Oct. Nov. Dec.
September avg. precipitation
🌧️ 0.21"
September days below freezing
📉 ≈0.0 days
Average September lows 58°F – 63°F
USDA Zone
10a
Annual extreme lows 30°F to 35°F
Last Spring Frost (36°F)
🌷 Jan 31
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First Fall Frost (36°F)
🍂 Dec 20
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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: POMONA/FAIRPLEX (USC00047050)

Precipitation climatic data from weather station: WALNUT NI FC102C (USC00049431)

Agricultural climatic data from weather station: ANAHEIM (USC00040192)