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Weather in Shasta County, California for December 2025

Your guide to Shasta County weather in December - trends and predictions

    Snow Forecast ❄️

  • Snowfall in Shasta County during December is quite rare, with fewer than 2 snowy days on average.
    According to Shasta County snow forecast for December 2025, 1 snowy day is expected in the next 2 weeks at Tuesday, December 23.

    • Temperatures

  • Until now, December 2025 in Shasta County is slightly cooler than the historical average by -1.1 °F.

  • Expect cooler weather in the next days in Shasta County with the forecast suggesting a temperature of 14.2 °F, lower than the historical average.

  • In general, the average temperature in Shasta County at the beginning of December is 16.6 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 10.3 °F by the end of December.

    • Rain 🌧️

  • The climate of Shasta County in December is notably wet, with an average of 15 rainy days, and a total of 561.4 mm of precipitation.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
16
Dry days
Average rainy days
15
Rainy days
Average snowy days
0
Snow days
Average temperatures
12°/6°
Temperatures
Average wind speed
13 km/h
Avg max wind
Average humidity
70 %
Avg humidity

Shasta County Weather December

Move between months or click on a day
November
January
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Partly cloudy
16°
2
Cloudy
17°
3
Sunny
17°
4
Sunny
16°
5
Overcast
18°
6
Overcast
17°
7
Overcast
15°
8
Sunny
15°
9
Sunny
16°
10
Partly cloudy
15°
11
Sunny
23°
12
Partly cloudy
20°
13
Sunny
19°
14
Partly cloudy
18°
15
Partly cloudy
17°
16
Partly cloudy
16°
17
Patchy rain possible
16°
18
Patchy rain possible
13°
19
Moderate rain
11°
20
Patchy rain possible
11°
21
Patchy rain possible
7°
22
Patchy rain possible
8°
23
Moderate rain
5°
24
Moderate or heavy rain shower
11°
25
Overcast
9°
26
Moderate or heavy rain shower
8°
27
Moderate or heavy rain shower
11°
28
Heavy rain at times
11°
29
Moderate or heavy rain shower
13°
30
Partly cloudy
12°
31
Overcast
8°

Temperatures trend during December in Shasta County

See the weather trend as well as the moving average line

December weather in Shasta County day by day

Click on a date for more information
November January
Date Weather Temperatures Rain Snow More
Dec. 1 Partly cloudy
Partly cloudy
 16° /5° 0 mm 0 cm
Dec. 2 Cloudy
Cloudy
 17° /7° 0 mm 0 cm
Dec. 3 Sunny
Sunny
 17° /7° 0 mm 0 cm
Dec. 4 Sunny
Sunny
 16° /7° 0 mm 0 cm
Dec. 5 Overcast
Overcast
 18° /8° 0 mm 0 cm
Dec. 6 Overcast
Overcast
 17° /8° 0 mm 0 cm
Dec. 7 Overcast
Overcast
 15° /7° 0 mm 0 cm
Dec. 8 Sunny
Sunny
 15° /7° 0 mm 0 cm
Dec. 9 Sunny
Sunny
 16° /7° 0 mm 0 cm
Dec. 10 Partly cloudy
Partly cloudy
 15° /4° 0 mm 0 cm
Dec. 11 Sunny
Sunny
 23° /4° 0 mm 0 cm
Dec. 12 Partly cloudy
Partly cloudy
 20° /12° 0 mm 0 cm
Dec. 13 Sunny
Sunny
 19° /9° 0 mm 0 cm
Dec. 14 Partly cloudy
Partly cloudy
 18° /6° 0 mm 0 cm
Dec. 15 Partly cloudy
Partly cloudy
 17° /7° 0 mm 0 cm
Dec. 16 Partly cloudy
Partly cloudy
 16° /8° 0 mm 0 cm
Dec. 17 Patchy rain possible
Patchy rain possible
 16° /9° 0.8 mm 0 cm
Dec. 18 Patchy rain possible
Patchy rain possible
 13° /8° 0.1 mm 0 cm
Dec. 19 Moderate rain
Moderate rain
 11° /7° 7.9 mm 0 cm
Dec. 20 Patchy rain possible
Patchy rain possible
 11° /6° 1 mm 0 cm
Dec. 21 Patchy rain possible
Patchy rain possible
 7° /4° 3.3 mm 0 cm
Dec. 22 Patchy rain possible
Patchy rain possible
 8° /0° 0.7 mm 0 cm
Dec. 23 Moderate rain
Moderate rain
 5° /-2° 5.2 mm 0 cm
Dec. 24 Moderate or heavy rain shower
Moderate or heavy rain shower
 11° /6° 53 mm 0 cm
Dec. 25 Overcast
Overcast
 9° /4° 0.7 mm 0 cm
Dec. 26 Moderate or heavy rain shower
Moderate or heavy rain shower
 8° /6° 66.5 mm 0 cm
Dec. 27 Moderate or heavy rain shower
Moderate or heavy rain shower
 11° /8° 51.9 mm 0 cm
Dec. 28 Heavy rain at times
Heavy rain at times
 11° /9° 19.1 mm 0 cm
Dec. 29 Moderate or heavy rain shower
Moderate or heavy rain shower
 13° /6° 24.8 mm 0 cm
Dec. 30 Partly cloudy
Partly cloudy
 12° /3° 0 mm 0 cm
Dec. 31 Overcast
Overcast
 8° /3° 0 mm 0 cm
Next
Important Notice
Our weather forecast for Shasta County in December is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Shasta County forecast closer to your planned date for the most up-to-date weather information.
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Shasta County in December - FAQ

What are the expected maximum and minimum temperatures in Shasta County during December?
During December, expect a variety of temperatures with highs around 12° and lows near 6°, suitable for diverse activities and preferences.
How much rainfall should be expected in Shasta County during December?
Significant rainfall exceeding 561.4 mm is expected in Shasta County during December, occurring over more than 15 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Shasta County during December?
The average wind speed in Shasta County during December is 13 km/h, suggesting breezy to windy conditions, depending on your activities.

Shasta County snow forecast December 2025

Track daily snowfall levels and discover Shasta County’s snowy potential this December ❄️

December rainfall patterns in Shasta County

Explore the daily rainfall trends and prepare for Shasta Countys December weather 💧
Typically, Shasta County has 15 rainy days in December with a total of 561.4 mm of rainfall.

UV exposure in Shasta County during December

Stay informed about UV levels for safe outdoor activities throughout the month of December ☀️
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Location coordinates Where is Shasta County?

Get accurate weather forecasts for Shasta County, located at latitude 40.587 and longitude -122.392. Stay updated with localized weather information tailored for Shasta County.

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