Alameda County (Oakland)
December
Weather in Alameda County for December 2025
Your guide to Alameda County weather in December - trends and predictions
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.
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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Temperatures
Rain 🌧️
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16
Dry days
15
Rainy days
0
Snow days
13°/9°
Temperatures
14 km/h
Avg max wind
80 %
Avg humidity
Alameda County Weather December
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| Sun. | Mon. | Tue. | Wed. | Thu. | Fri. | Sat. |
|---|---|---|---|---|---|---|
| 1  15° | 2  13° | 3  13° | 4 12° | 5 13° | 6  12° | |
| 7 12° | 8  12° | 9 14° | 10 13° | 11 14° | 12  13° | 13 14° |
| 14 14° | 15  12° | 16 14° | 17 14° | 18 12° | 19  14° | 20 14° |
| 21 14° | 22 14° | 23 14° | 24 14° | 25 14° | 26 14° | 27  14° |
| 28 14° | 29 13° | 30  12° | 31 12° |
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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 | 15° /9° | 0 mm | 4 | |
| Dec. 2 | Patchy rain possible | 13° /9° | 0.2 mm | 3 | |
| Dec. 3 | Fog | 13° /9° | 0 mm | 4 | |
| Dec. 4 | Fog | 12° /10° | 0 mm | 3 | |
| Dec. 5 | Fog | 13° /9° | 0 mm | 3 | |
| Dec. 6 | Moderate rain | 12° /9° | 4.1 mm | 3 | |
| Dec. 7 | Light rain shower | 12° /9° | 1.6 mm | 3 | |
| Dec. 8 | Overcast | 12° /7° | 0 mm | 3 | |
| Dec. 9 | Overcast | 14° /6° | 0 mm | 3 | |
| Dec. 10 | Overcast | 13° /6° | 0 mm | 4 | |
| Dec. 11 | Overcast | 14° /8° | 0 mm | 3 | |
| Dec. 12 | Partly cloudy | 13° /10° | 17.4 mm | 4 | |
| Dec. 13 | Overcast | 14° /9° | 0 mm | 3 | |
| Dec. 14 | Overcast | 14° /9° | 48.4 mm | 4 | |
| Dec. 15 | Sunny | 12° /7° | 0 mm | 4 | |
| Dec. 16 | Partly cloudy | 14° /8° | 4.6 mm | 4 | |
| Dec. 17 | Partly cloudy | 14° /10° | 0.2 mm | 4 | |
| Dec. 18 | Light rain shower | 12° /9° | 8.6 mm | 3 | |
| Dec. 19 | Moderate or heavy rain with thunder | 14° /9° | 8.3 mm | 4 | |
| Dec. 20 | Moderate rain | 14° /9° | 13.8 mm | 3 | |
| Dec. 21 | Partly cloudy | 14° /10° | 3 mm | 4 | |
| Dec. 22 | Partly cloudy | 14° /10° | 0.9 mm | 4 | |
| Dec. 23 | Overcast | 14° /10° | 0 mm | 3 | |
| Dec. 24 | Sunny | 14° /8° | 19.8 mm | 4 | |
| Dec. 25 | Overcast | 14° /8° | 0 mm | 4 | |
| Dec. 26 | Patchy rain possible | 14° /9° | 2 mm | 3 | |
| Dec. 27 | Moderate or heavy rain shower | 14° /10° | 22.5 mm | 3 | |
| Dec. 28 | Sunny | 14° /10° | 0.3 mm | 4 | |
| Dec. 29 | Patchy rain possible | 13° /10° | 8.7 mm | 3 | |
| Dec. 30 | Heavy rain at times | 12° /9° | 5.1 mm | 3 | |
| Dec. 31 | 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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