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United States weather

Weather in Santa Clara County, California for December 2025

Your guide to Santa Clara County weather in December - trends and predictions

    Temperatures

  • Until now, December 2025 in Santa Clara County has been nearly identical to the historical average, with a temperature of 16.7 °F (showing only a slight deviation of 0.1 °F).

  • Expect cooler weather in the next days in Santa Clara County with the forecast suggesting a temperature of 15.1 °F, lower than the historical average.

  • In general, the average temperature in Santa Clara County at the beginning of December is 17.1 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 13.1 °F by the end of December.

    • Rain 🌧️

  • The climate of Santa Clara County in December is notably wet, with an average of 11 rainy days, and a total of 161 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
9 km/h
Avg max wind
Average humidity
71 %
Avg humidity

Santa Clara County Weather December

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

Temperatures trend during December in Santa Clara County

See the weather trend as well as the moving average line

December weather in Santa Clara County day by day

Click on a date for more information
November January
Date Weather Temperatures Rain UV More
Dec. 1 Fog
Fog
 18° /6° 0 mm 4
Dec. 2 Patchy rain possible
Patchy rain possible
 17° /7° 0 mm 4
Dec. 3 Mist
Mist
 17° /7° 0 mm 4
Dec. 4 Mist
Mist
 17° /8° 0 mm 5
Dec. 5 Mist
Mist
 19° /8° 0 mm 5
Dec. 6 Light rain
Light rain
 17° /8° 1.3 mm 4
Dec. 7 Light rain shower
Light rain shower
 15° /7° 0.3 mm 4
Dec. 8 Cloudy
Cloudy
 15° /7° 0 mm 3
Dec. 9 Partly cloudy
Partly cloudy
 15° /5° 0 mm 4
Dec. 10 Overcast
Overcast
 18° /5° 0 mm 5
Dec. 11 Overcast
Overcast
 17° /7° 0 mm 5
Dec. 12 Overcast
Overcast
 16° /9° 7.8 mm 4
Dec. 13 Overcast
Overcast
 17° /8° 0 mm 4
Dec. 14 Overcast
Overcast
 15° /7° 22.1 mm 4
Dec. 15 Sunny
Sunny
 16° /6° 0 mm 4
Dec. 16 Partly cloudy
Partly cloudy
 15° /8° 0 mm 4
Dec. 17 Patchy rain possible
Patchy rain possible
 19° /10° 2.6 mm 0.3
Dec. 18 Partly cloudy
Partly cloudy
 16° /9° 0 mm 0.4
Dec. 19 Cloudy
Cloudy
 13° /11° 0 mm 0.5
Dec. 20 Patchy rain possible
Patchy rain possible
 21° /10° 2.2 mm 0.4
Dec. 21 Patchy rain possible
Patchy rain possible
 19° /13° 0.8 mm 0
Dec. 22 Overcast
Overcast
 18° /12° 0 mm 3
Dec. 23 Patchy rain possible
Patchy rain possible
 15° /10° 2.6 mm 3
Dec. 24 Patchy rain possible
Patchy rain possible
 12° /9° 0.4 mm 3
Dec. 25 Moderate rain
Moderate rain
 13° /8° 6.1 mm 2
Dec. 26 Patchy rain possible
Patchy rain possible
 12° /9° 0.8 mm 3
Dec. 27 Overcast
Overcast
 16° /9° 0 mm 3
Dec. 28 Patchy rain possible
Patchy rain possible
 13° /9° 0.3 mm 3
Dec. 29 Sunny
Sunny
 14° /6° 0 mm 3
Dec. 30 Patchy rain possible
Patchy rain possible
 11° /9° 4.3 mm 3
Dec. 31 Moderate or heavy rain shower
Moderate or heavy rain shower
 13° /6° 17.7 mm 3
Next
Important Notice
Our weather forecast for Santa Clara 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 Santa Clara County forecast closer to your planned date for the most up-to-date weather information.
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Santa Clara County in December - FAQ

What are the expected maximum and minimum temperatures in Santa Clara 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 Santa Clara County during December?
Significant rainfall exceeding 161 mm is expected in Santa Clara County during December, occurring over more than 11 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Santa Clara County during December?
The average wind speed in Santa Clara County during December is 9 km/h, suggesting breezy to windy conditions, depending on your activities.

December rainfall patterns in Santa Clara County

Explore the daily rainfall trends and prepare for Santa Clara Countys December weather 💧
Typically, Santa Clara County has 11 rainy days in December with a total of 161 mm of rainfall.

UV exposure in Santa Clara 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 Santa Clara County?

Get accurate weather forecasts for Santa Clara County, located at latitude 37.339 and longitude -121.895. Stay updated with localized weather information tailored for Santa Clara County.

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