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United States weather

Weather in Monterey County, California for December 2025

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

    Temperatures

  • The forecast for the first days of December 2025 in Monterey County predicts temperatures to be around 19 °F, close to the historical average.

  • In general, the average temperature in Monterey County at the beginning of December is 19.1 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 14.3 °F by the end of December.

    • Rain 🌧️

  • The climate of Monterey County in December is notably wet, with an average of 11 rainy days, and a total of 99.6 mm of precipitation.

    • More

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

Average dry days
20
Dry days
Average rainy days
11
Rainy days
Average snowy days
0
Snow days
Average temperatures
15°/8°
Temperatures
Average wind speed
11 km/h
Avg max wind
Average humidity
75 %
Avg humidity

Monterey County Weather December

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

Temperatures trend during December in Monterey County

See the weather trend as well as the moving average line

December weather in Monterey County day by day

Click on a date for more information
November January
Date Weather Temperatures Rain UV More
Dec. 1 Sunny
Sunny
 19° /6° 0 mm 0
Dec. 2 Sunny
Sunny
 18° /7° 0 mm 4
Dec. 3 Patchy rain possible
Patchy rain possible
 17° /7° 0.2 mm 3
Dec. 4 Partly cloudy
Partly cloudy
 17° /8° 0 mm 4
Dec. 5 Sunny
Sunny
 22° /8° 0 mm 4
Dec. 6 Sunny
Sunny
 22° /9° 0 mm 4
Dec. 7 Patchy rain possible
Patchy rain possible
 19° /10° 0.6 mm 3
Dec. 8 Moderate rain
Moderate rain
 17° /10° 7.1 mm 3
Dec. 9 Sunny
Sunny
 19° /8° 0 mm 4
Dec. 10 Sunny
Sunny
 20° /8° 0 mm 4
Dec. 11 Cloudy
Cloudy
 17° /6° 0 mm 4
Dec. 12 Overcast
Overcast
 14° /7° 8.3 mm 4
Dec. 13 Overcast
Overcast
 16° /7° 0 mm 4
Dec. 14 Overcast
Overcast
 16° /8° 6.6 mm 4
Dec. 15 Sunny
Sunny
 15° /6° 0 mm 5
Dec. 16 Sunny
Sunny
 18° /8° 4.3 mm 5
Dec. 17 Patchy rain possible
Patchy rain possible
 17° /10° 0.5 mm 4
Dec. 18 Light rain shower
Light rain shower
 16° /9° 5.3 mm 4
Dec. 19 Moderate or heavy rain with thunder
Moderate or heavy rain with thunder
 19° /9° 2.9 mm 5
Dec. 20 Light rain shower
Light rain shower
 15° /10° 16.6 mm 4
Dec. 21 Patchy rain possible
Patchy rain possible
 15° /9° 0.1 mm 4
Dec. 22 Sunny
Sunny
 17° /10° 0 mm 5
Dec. 23 Sunny
Sunny
 15° /9° 0 mm 5
Dec. 24 Overcast
Overcast
 15° /7° 18.4 mm 4
Dec. 25 Partly cloudy
Partly cloudy
 14° /7° 0 mm 4
Dec. 26 Partly cloudy
Partly cloudy
 15° /7° 0 mm 4
Dec. 27 Light drizzle
Light drizzle
 15° /10° 15.2 mm 4
Dec. 28 Patchy rain possible
Patchy rain possible
 17° /11° 0.1 mm 4
Dec. 29 Light drizzle
Light drizzle
 15° /10° 14.5 mm 4
Dec. 30 Light rain shower
Light rain shower
 12° /7° 4.8 mm 3
Dec. 31 Light rain shower
Light rain shower
 12° /5° 0.7 mm 4
Next
Important Notice
Our weather forecast for Monterey 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 Monterey County forecast closer to your planned date for the most up-to-date weather information.
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Monterey County in December - FAQ

What are the expected maximum and minimum temperatures in Monterey County during December?
During December, expect a variety of temperatures with highs around 15° and lows near 8°, suitable for diverse activities and preferences.
How much rainfall should be expected in Monterey County during December?
Moderate rainfall is anticipated in Monterey County during December, with a total of 99.6 mm spread over approximately 11 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Monterey County during December?
The average wind speed in Monterey County during December is 11 km/h, suggesting breezy to windy conditions, depending on your activities.

December rainfall patterns in Monterey County

Explore the daily rainfall trends and prepare for Monterey Countys December weather 💧
Typically, Monterey County has 11 rainy days in December with a total of 99.6 mm of rainfall.

UV exposure in Monterey 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 Monterey County?

Get accurate weather forecasts for Monterey County, located at latitude 36.678 and longitude -121.656. Stay updated with localized weather information tailored for Monterey County.

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