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San Joaquin County (Stockton)
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United States weather

Weather in San Joaquin County, California for December 2025

Your guide to San Joaquin County weather in December - trends and predictions

    Temperatures

  • Until now, December 2025 in San Joaquin County is slightly cooler than the historical average by -1.8 °F.

  • The forecast for the upcoming days in San Joaquin County predicts a temperature of 16.6 °F, which is slightly above the historical average.

  • In general, the average temperature in San Joaquin County at the beginning of December is 15.6 °F. As the month progressed, temperatures tended to slightly decrease, reaching an average of 15.4 °F by the end of December.

    • Rain 🌧️

  • The climate of San Joaquin County in December is notably wet, with an average of 13 rainy days, and a total of 141.9 mm of precipitation.

    • More

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Average dry days
18
Dry days
Average rainy days
13
Rainy days
Average snowy days
0
Snow days
Average temperatures
14°/6°
Temperatures
Average wind speed
12 km/h
Avg max wind
Average humidity
74 %
Avg humidity

San Joaquin County Weather December

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

Temperatures trend during December in San Joaquin County

See the weather trend as well as the moving average line

December weather in San Joaquin County day by day

Click on a date for more information
November January
Date Weather Temperatures Rain UV More
Dec. 1 Mist
Mist
 16° /2° 0 mm 4
Dec. 2 Patchy rain possible
Patchy rain possible
 16° /3° 0 mm 4
Dec. 3 Overcast
Overcast
 17° /5° 0 mm 4
Dec. 4 Fog
Fog
 17° /5° 0 mm 4
Dec. 5 Mist
Mist
 16° /3° 0 mm 4
Dec. 6 Light rain shower
Light rain shower
 14° /4° 1.3 mm 3
Dec. 7 Mist
Mist
 13° /4° 0.3 mm 3
Dec. 8 Mist
Mist
 13° /3° 0 mm 3
Dec. 9 Cloudy
Cloudy
 12° /1° 0 mm 3
Dec. 10 Overcast
Overcast
 15° /0° 0 mm 4
Dec. 11 Overcast
Overcast
 14° /3° 0 mm 4
Dec. 12 Partly cloudy
Partly cloudy
 15° /4° 13.5 mm 4
Dec. 13 Overcast
Overcast
 15° /4° 0 mm 4
Dec. 14 Overcast
Overcast
 14° /5° 9.2 mm 3
Dec. 15 Fog
Fog
 16° /5° 0 mm 0.4
Dec. 16 Overcast
Overcast
 14° /9° 0 mm 0.2
Dec. 17 Fog
Fog
 17° /11° 0 mm 0.5
Dec. 18 Sunny
Sunny
 18° /9° 0 mm 0.4
Dec. 19 Patchy rain possible
Patchy rain possible
 18° /10° 0.8 mm 0
Dec. 20 Partly cloudy
Partly cloudy
 18° /12° 0 mm 4
Dec. 21 Moderate rain
Moderate rain
 15° /14° 7.5 mm 3
Dec. 22 Moderate rain
Moderate rain
 15° /14° 6.5 mm 3
Dec. 23 Partly cloudy
Partly cloudy
 16° /13° 0 mm 4
Dec. 24 Patchy rain possible
Patchy rain possible
 17° /14° 1.6 mm 4
Dec. 25 Sunny
Sunny
 19° /12° 0 mm 4
Dec. 26 Partly cloudy
Partly cloudy
 18° /11° 0 mm 4
Dec. 27 Overcast
Overcast
 15° /12° 0.1 mm 3
Dec. 28 Mist
Mist
 17° /11° 0 mm 3
Dec. 29 Heavy rain at times
Heavy rain at times
 14° /8° 6 mm 3
Dec. 30 Moderate or heavy rain shower
Moderate or heavy rain shower
 12° /7° 14.6 mm 3
Dec. 31 Moderate or heavy rain shower
Moderate or heavy rain shower
 13° /5° 23.4 mm 3
Next
Important Notice
Our weather forecast for San Joaquin 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 San Joaquin County forecast closer to your planned date for the most up-to-date weather information.
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San Joaquin County in December - FAQ

What are the expected maximum and minimum temperatures in San Joaquin County during December?
During December, expect a variety of temperatures with highs around 14° and lows near 6°, suitable for diverse activities and preferences.
How much rainfall should be expected in San Joaquin County during December?
Significant rainfall exceeding 141.9 mm is expected in San Joaquin County during December, occurring over more than 13 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in San Joaquin County during December?
The average wind speed in San Joaquin County during December is 12 km/h, suggesting breezy to windy conditions, depending on your activities.

December rainfall patterns in San Joaquin County

Explore the daily rainfall trends and prepare for San Joaquin Countys December weather 💧
Typically, San Joaquin County has 13 rainy days in December with a total of 141.9 mm of rainfall.
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Stockton
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Location coordinates Where is San Joaquin County?

Get accurate weather forecasts for San Joaquin County, located at latitude 37.958 and longitude -121.291. Stay updated with localized weather information tailored for San Joaquin County.

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