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Weather in Alameda County for December 2025

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

    Temperatures

  • In general, the average temperature in Alameda County at the beginning of December is 12.9 °F. As the month progressed, temperatures tended to slightly increase, reaching an average of 13.3 °F by the end of December.

  • Rain 🌧️

  • The climate of Alameda County in December is notably wet, with an average of 15 rainy days, and a total of 198.5 mm of precipitation.

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Average dry days
16
Dry days
Average rainy days
15
Rainy days
Average snowy days
0
Snow days
Average temperatures
13°/9°
Temperatures
Average wind speed
14 km/h
Avg max wind
Average humidity
80 %
Avg humidity

Alameda County Weather December

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Temperatures trend during December in Alameda County

See the weather trend as well as the moving average line

December weather day by day

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Date Weather Temperatures Rain UV More
Dec. 1 Cloudy
Cloudy
15° /9° 0 mm 4
Dec. 2 Patchy rain possible
Patchy rain possible
13° /9° 0.2 mm 3
Dec. 3 Fog
Fog
13° /9° 0 mm 4
Dec. 4 Fog
Fog
12° /10° 0 mm 3
Dec. 5 Fog
Fog
13° /9° 0 mm 3
Dec. 6 Moderate rain
Moderate rain
12° /9° 4.1 mm 3
Dec. 7 Light rain shower
Light rain shower
12° /9° 1.6 mm 3
Dec. 8 Overcast
Overcast
12° /7° 0 mm 3
Dec. 9 Overcast
Overcast
14° /6° 0 mm 3
Dec. 10 Overcast
Overcast
13° /6° 0 mm 4
Dec. 11 Overcast
Overcast
14° /8° 0 mm 3
Dec. 12 Partly cloudy
Partly cloudy
13° /10° 17.4 mm 4
Dec. 13 Overcast
Overcast
14° /9° 0 mm 3
Dec. 14 Overcast
Overcast
14° /9° 48.4 mm 4
Dec. 15 Sunny
Sunny
12° /7° 0 mm 4
Dec. 16 Partly cloudy
Partly cloudy
14° /8° 4.6 mm 4
Dec. 17 Partly cloudy
Partly cloudy
14° /10° 0.2 mm 4
Dec. 18 Light rain shower
Light rain shower
12° /9° 8.6 mm 3
Dec. 19 Moderate or heavy rain with thunder
Moderate or heavy rain with thunder
14° /9° 8.3 mm 4
Dec. 20 Moderate rain
Moderate rain
14° /9° 13.8 mm 3
Dec. 21 Partly cloudy
Partly cloudy
14° /10° 3 mm 4
Dec. 22 Partly cloudy
Partly cloudy
14° /10° 0.9 mm 4
Dec. 23 Overcast
Overcast
14° /10° 0 mm 3
Dec. 24 Sunny
Sunny
14° /8° 19.8 mm 4
Dec. 25 Overcast
Overcast
14° /8° 0 mm 4
Dec. 26 Patchy rain possible
Patchy rain possible
14° /9° 2 mm 3
Dec. 27 Moderate or heavy rain shower
Moderate or heavy rain shower
14° /10° 22.5 mm 3
Dec. 28 Sunny
Sunny
14° /10° 0.3 mm 4
Dec. 29 Patchy rain possible
Patchy rain possible
13° /10° 8.7 mm 3
Dec. 30 Heavy rain at times
Heavy rain at times
12° /9° 5.1 mm 3
Dec. 31 Moderate or heavy rain shower
Moderate or heavy rain shower
12° /8° 29 mm 3
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Important Notice
Our weather forecast for Alameda 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 Alameda County forecast closer to your planned date for the most up-to-date weather information.

Alameda County in December - FAQ

What are the expected maximum and minimum temperatures in Alameda County during December?
During December, expect a variety of temperatures with highs around 13° and lows near 9°, suitable for diverse activities and preferences.
How much rainfall should be expected in Alameda County during December?
Significant rainfall exceeding 198.5 mm is expected in Alameda 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 Alameda County during December?
The average wind speed in Alameda County during December is 14 km/h, suggesting breezy to windy conditions, depending on your activities.

December rainfall patterns in Alameda County

Explore the daily rainfall trends and prepare for Alameda Countys December weather 💧
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Location coordinates Where is Alameda County?

Get accurate weather forecasts for Alameda County, located at latitude 37.804 and longitude -122.271. Stay updated with localized weather information tailored for Alameda County.

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