🌷 Your Ultimate Garden Calendar!

Weather Almanac: New Castle, CO 81647

🗓️ Historical norms for December 2025

November January
Jan. Feb. Mar. Apr. May. Jun. Jul. Aug. Sep. Oct. Nov. Dec.
December avg. precipitation
🌧️ 0.84"
December days below freezing
📉 ≈30.2 days
Average December lows 10°F – 18°F
USDA Zone
6a
Annual extreme lows -10°F to -5°F
Last Spring Frost (36°F)
🌷 Jun 3
View full details
First Fall Frost (36°F)
🍂 Sep 19
View full details

Book Recommendations (ads!)

📚 Rocky Mountain Month-By-Month Gardening: What to Do Each Month to Have A Beautiful Garden All Year - Colorado, Idaho, Montana, Utah, Wyoming

F: Forecast
H: Normal High Temp
L: Normal Low Temp
Mon. December 1  

🌅 7:11 a.m.

H: 31°F – 49°F

L: 9°F – 27°F

🌇 4:46 p.m.

Tue. December 2  

🌅 7:12 a.m.

H: 30°F – 48°F

L: 9°F – 27°F

🌇 4:46 p.m.

Wed. December 3  

🌅 7:13 a.m.

H: 30°F – 48°F

L: 8°F – 27°F

🌇 4:46 p.m.

Thu. December 4 🌕

🌅 7:14 a.m.

H: 30°F – 47°F

L: 8°F – 27°F

🌇 4:46 p.m.

Fri. December 5  

🌅 7:15 a.m.

H: 29°F – 47°F

L: 8°F – 27°F

🌇 4:45 p.m.

Sat. December 6  

🌅 7:16 a.m.

H: 29°F – 46°F

L: 7°F – 26°F

🌇 4:45 p.m.

Sun. December 7  

🌅 7:17 a.m.

H: 29°F – 46°F

L: 7°F – 26°F

🌇 4:45 p.m.

Mon. December 8  

🌅 7:18 a.m.

H: 29°F – 46°F

L: 7°F – 26°F

🌇 4:45 p.m.

Tue. December 9  

🌅 7:19 a.m.

H: 28°F – 45°F

L: 6°F – 26°F

🌇 4:45 p.m.

Wed. December 10  

🌅 7:20 a.m.

H: 28°F – 45°F

L: 6°F – 25°F

🌇 4:46 p.m.

Thu. December 11 🌗

🌅 7:20 a.m.

H: 28°F – 45°F

L: 6°F – 25°F

🌇 4:46 p.m.

Fri. December 12  

🌅 7:21 a.m.

H: 28°F – 44°F

L: 5°F – 25°F

🌇 4:46 p.m.

Sat. December 13  

🌅 7:22 a.m.

H: 27°F – 44°F

L: 5°F – 25°F

🌇 4:46 p.m.

Sun. December 14  

🌅 7:23 a.m.

H: 27°F – 44°F

L: 5°F – 24°F

🌇 4:46 p.m.

Mon. December 15  

🌅 7:23 a.m.

H: 27°F – 44°F

L: 5°F – 24°F

🌇 4:47 p.m.

Tue. December 16  

🌅 7:24 a.m.

H: 27°F – 43°F

L: 4°F – 24°F

🌇 4:47 p.m.

Wed. December 17  

🌅 7:25 a.m.

H: 27°F – 43°F

L: 4°F – 24°F

🌇 4:47 p.m.

Thu. December 18  

🌅 7:25 a.m.

H: 27°F – 43°F

L: 4°F – 23°F

🌇 4:48 p.m.

Fri. December 19 🌑

🌅 7:26 a.m.

H: 27°F – 43°F

L: 4°F – 23°F

🌇 4:48 p.m.

Sat. December 20  

🌅 7:26 a.m.

H: 27°F – 43°F

L: 3°F – 23°F

🌇 4:49 p.m.

Sun. December 21 Winter Solstice  

🌅 7:27 a.m.

H: 27°F – 42°F

L: 3°F – 23°F

🌇 4:49 p.m.

Mon. December 22  

🌅 7:27 a.m.

H: 27°F – 42°F

L: 3°F – 22°F

🌇 4:50 p.m.

Tue. December 23  

🌅 7:28 a.m.

H: 27°F – 42°F

L: 3°F – 22°F

🌇 4:50 p.m.

Wed. December 24 Christmas Eve  

🌅 7:28 a.m.

H: 27°F – 42°F

L: 3°F – 22°F

🌇 4:51 p.m.

Thu. December 25 Christmas Day  

🌅 7:29 a.m.

H: 27°F – 42°F

L: 3°F – 22°F

🌇 4:51 p.m.

Fri. December 26  

🌅 7:29 a.m.

H: 27°F – 42°F

L: 2°F – 22°F

🌇 4:52 p.m.

Sat. December 27 🌓

🌅 7:29 a.m.

H: 27°F – 42°F

L: 2°F – 21°F

🌇 4:53 p.m.

Sun. December 28  

🌅 7:30 a.m.

H: 27°F – 42°F

L: 2°F – 21°F

🌇 4:53 p.m.

Mon. December 29  

🌅 7:30 a.m.

H: 27°F – 42°F

L: 2°F – 21°F

🌇 4:54 p.m.

Tue. December 30  

🌅 7:30 a.m.

H: 27°F – 42°F

L: 2°F – 21°F

🌇 4:55 p.m.

Wed. December 31  

🌅 7:30 a.m.

H: 27°F – 42°F

L: 2°F – 21°F

🌇 4:56 p.m.

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

Temperature climatic data from weather station: RIFLE GARFIELD CO AP (USW00003016)

Precipitation climatic data from weather station: RIFLE GARFIELD CO AP (USW00003016)

Agricultural climatic data from weather station: RIFLE GARFIELD CO AP (USW00003016)