🌷 Your Ultimate Garden Calendar!

Weather Almanac: Rancho Cucamonga, CA 91701

🗓️ Historical norms for December 2025

November January
Jan. Feb. Mar. Apr. May. Jun. Jul. Aug. Sep. Oct. Nov. Dec.
December avg. precipitation
🌧️ 2.32"
December days below freezing
📉 ≈0.5 days
Average December lows 41°F – 45°F
USDA Zone
10a
Annual extreme lows 30°F to 35°F
Last Spring Frost (36°F)
🌷 Feb 24
View full details
First Fall Frost (36°F)
🍂 Dec 2
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
Mon. December 1  

🌅 6:38 a.m.

H: 59°F – 76°F

L: 38°F – 49°F

🌇 4:40 p.m.

Tue. December 2  

🌅 6:39 a.m.

H: 59°F – 76°F

L: 38°F – 49°F

🌇 4:40 p.m.

Wed. December 3  

🌅 6:40 a.m.

H: 59°F – 75°F

L: 38°F – 48°F

🌇 4:40 p.m.

Thu. December 4 🌕

🌅 6:40 a.m.

H: 59°F – 75°F

L: 38°F – 48°F

🌇 4:40 p.m.

Fri. December 5  

🌅 6:41 a.m.

H: 59°F – 75°F

L: 38°F – 48°F

🌇 4:40 p.m.

Sat. December 6  

🌅 6:42 a.m.

H: 58°F – 75°F

L: 38°F – 48°F

🌇 4:40 p.m.

Sun. December 7  

🌅 6:43 a.m.

H: 58°F – 74°F

L: 37°F – 48°F

🌇 4:40 p.m.

Mon. December 8  

🌅 6:44 a.m.

H: 58°F – 74°F

L: 37°F – 48°F

🌇 4:40 p.m.

Tue. December 9  

🌅 6:44 a.m.

H: 58°F – 74°F

L: 37°F – 48°F

🌇 4:41 p.m.

Wed. December 10  

🌅 6:45 a.m.

H: 58°F – 74°F

L: 37°F – 48°F

🌇 4:41 p.m.

Thu. December 11 🌗

🌅 6:46 a.m.

H: 58°F – 74°F

L: 37°F – 48°F

🌇 4:41 p.m.

Fri. December 12  

🌅 6:46 a.m.

H: 57°F – 74°F

L: 37°F – 48°F

🌇 4:41 p.m.

Sat. December 13  

🌅 6:47 a.m.

H: 57°F – 74°F

L: 37°F – 48°F

🌇 4:41 p.m.

Sun. December 14  

🌅 6:48 a.m.

H: 57°F – 74°F

L: 37°F – 48°F

🌇 4:42 p.m.

Mon. December 15  

🌅 6:49 a.m.

H: 57°F – 73°F

L: 37°F – 48°F

🌇 4:42 p.m.

Tue. December 16  

🌅 6:49 a.m.

H: 57°F – 73°F

L: 37°F – 48°F

🌇 4:42 p.m.

Wed. December 17  

🌅 6:50 a.m.

H: 57°F – 73°F

L: 37°F – 48°F

🌇 4:43 p.m.

Thu. December 18  

🌅 6:50 a.m.

H: 57°F – 73°F

L: 37°F – 48°F

🌇 4:43 p.m.

Fri. December 19 🌑

🌅 6:51 a.m.

H: 57°F – 73°F

L: 37°F – 48°F

🌇 4:44 p.m.

Sat. December 20  

🌅 6:51 a.m.

H: 57°F – 73°F

L: 37°F – 48°F

🌇 4:44 p.m.

Sun. December 21 Winter Solstice  

🌅 6:52 a.m.

H: 57°F – 73°F

L: 37°F – 48°F

🌇 4:45 p.m.

Mon. December 22  

🌅 6:52 a.m.

H: 57°F – 74°F

L: 37°F – 48°F

🌇 4:45 p.m.

Tue. December 23  

🌅 6:53 a.m.

H: 57°F – 74°F

L: 37°F – 48°F

🌇 4:46 p.m.

Wed. December 24 Christmas Eve  

🌅 6:53 a.m.

H: 56°F – 74°F

L: 38°F – 48°F

🌇 4:46 p.m.

Thu. December 25 Christmas Day  

🌅 6:54 a.m.

H: 56°F – 74°F

L: 38°F – 48°F

🌇 4:47 p.m.

Fri. December 26  

🌅 6:54 a.m.

H: 56°F – 74°F

L: 38°F – 48°F

🌇 4:47 p.m.

Sat. December 27 🌓

🌅 6:54 a.m.

H: 56°F – 74°F

L: 38°F – 48°F

🌇 4:48 p.m.

Sun. December 28  

🌅 6:55 a.m.

H: 56°F – 74°F

L: 38°F – 48°F

🌇 4:49 p.m.

Mon. December 29  

🌅 6:55 a.m.

H: 56°F – 74°F

L: 38°F – 48°F

🌇 4:49 p.m.

Tue. December 30  

🌅 6:55 a.m.

H: 57°F – 74°F

L: 38°F – 48°F

🌇 4:50 p.m.

Wed. December 31  

🌅 6:56 a.m.

H: 57°F – 74°F

L: 38°F – 48°F

🌇 4:51 p.m.

November January
Jan. Feb. Mar. Apr. May. Jun. Jul. Aug. Sep. Oct. Nov. Dec.

Temperature climatic data from weather station: ONTARIO INTL AP (USW00003102)

Precipitation climatic data from weather station: ONTARIO INTL AP (USW00003102)

Agricultural climatic data from weather station: ONTARIO INTL AP (USW00003102)