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San Joaquin County (Stockton)
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United States weather

Weather in San Joaquin County, California for December 2026

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

    Temperatures

  • In general, the average temperature in San Joaquin County at the beginning of December is 15.5 °C. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 12.7 °C by the end of December.

    • Rain 🌧️

  • San Joaquin County experiences moderate rainfall in December, with an average of 8 rainy days and a total precipitation of 193.7 mm.

    • More

  • Is December a good time to visit San Joaquin County? check out the best time to travel to San Joaquin County page.

  • ✨ Is December a good time to visit San Joaquin County? – Ask the AI Weatherman

Average dry days
23
Dry days
Average rainy days
8
Rainy days
Average snowy days
0
Snow days
Average temperatures
14°/6°
Temperatures
Average wind speed
12 km/h
Avg max wind
Average humidity
78 %
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
12°
9
Cloudy
11°
10
Overcast
15°
11
Overcast
13°
12
Moderate rain
14°
13
Overcast
15°
14
Light rain
13°
15
Sunny
13°
16
Patchy rain possible
15°
17
Fog
16°
18
Patchy rain possible
12°
19
Light rain
12°
20
Light rain
15°
21
Heavy rain
14°
22
Heavy rain
15°
23
Mist
15°
24
Moderate rain
14°
25
Moderate rain
13°
26
Patchy rain possible
13°
27
Moderate rain
13°
28
Sunny
14°
29
Light rain
12°
30
Moderate rain
12°
31
Moderate rain
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 2.3
Dec. 2 Patchy rain possible
Patchy rain possible
 16° /4° 0 mm 2.3
Dec. 3 Overcast
Overcast
 17° /5° 0 mm 2.3
Dec. 4 Fog
Fog
 17° /5° 0 mm 2.3
Dec. 5 Mist
Mist
 16° /3° 0 mm 2.2
Dec. 6 Light rain shower
Light rain shower
 14° /4° 1.3 mm 2.2
Dec. 7 Mist
Mist
 13° /4° 0.3 mm 2.2
Dec. 8 Mist
Mist
 12° /4° 0 mm 2.2
Dec. 9 Cloudy
Cloudy
 11° /1° 0 mm 2.2
Dec. 10 Overcast
Overcast
 15° /0° 0 mm 2.2
Dec. 11 Overcast
Overcast
 13° /4° 0 mm 2.2
Dec. 12 Moderate rain
Moderate rain
 14° /5° 13.5 mm 2.1
Dec. 13 Overcast
Overcast
 15° /4° 0 mm 2.1
Dec. 14 Light rain
Light rain
 13° /5° 9.2 mm 2.1
Dec. 15 Sunny
Sunny
 13° /5° 0 mm 2.1
Dec. 16 Patchy rain possible
Patchy rain possible
 15° /7° 1.8 mm 2.1
Dec. 17 Fog
Fog
 16° /9° 0 mm 2.1
Dec. 18 Patchy rain possible
Patchy rain possible
 12° /8° 2.2 mm 2.1
Dec. 19 Light rain
Light rain
 12° /9° 6.2 mm 2.1
Dec. 20 Light rain
Light rain
 15° /10° 8.6 mm 2.1
Dec. 21 Heavy rain
Heavy rain
 14° /9° 35 mm 2.1
Dec. 22 Heavy rain
Heavy rain
 15° /9° 31.6 mm 2.1
Dec. 23 Mist
Mist
 15° /9° 0 mm 2.1
Dec. 24 Moderate rain
Moderate rain
 14° /9° 17.8 mm 2.1
Dec. 25 Moderate rain
Moderate rain
 13° /8° 13.7 mm 2.1
Dec. 26 Patchy rain possible
Patchy rain possible
 13° /8° 2.2 mm 2.1
Dec. 27 Moderate rain
Moderate rain
 13° /8° 15.7 mm 2.1
Dec. 28 Sunny
Sunny
 14° /7° 0 mm 2.1
Dec. 29 Light rain
Light rain
 12° /7° 4.5 mm 2
Dec. 30 Moderate rain
Moderate rain
 12° /5° 11 mm 2.2
Dec. 31 Moderate rain
Moderate rain
 13° /6° 19.1 mm 2.2
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 193.7 mm is expected in San Joaquin County during December, occurring over more than 8 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 8 rainy days in December with a total of 193.7 mm of rainfall.
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Stockton
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