Alameda County (Oakland)
December
Weather in Alameda County, California for December 2026
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 °C. As the month progressed, temperatures tended to slightly decrease, reaching an average of 12.7 °C by the end of December.
Alameda County experiences moderate rainfall in December, with an average of 9 rainy days and a total precipitation of 249.6 mm.
Is December a good time to visit Alameda County? check out the best time to travel to Alameda County page.
✨ Is December a good time to visit Alameda County? – Ask the AI Weatherman
Temperatures
Rain 🌧️
More
22
Dry days
9
Rainy days
0
Snow days
13°/9°
Temperatures
14 km/h
Avg max wind
83 %
Avg humidity
Alameda County Weather December
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Temperatures trend during December in Alameda County
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December weather in Alameda County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Dec. 1 |  Cloudy | 15° /9° | 0 mm | 2.4 | |
| Dec. 2 |  Fog | 12° /9° | 0.1 mm | 2.3 | |
| Dec. 3 | Fog | 13° /9° | 0 mm | 2.3 | |
| Dec. 4 | Fog | 13° /9° | 0 mm | 2.3 | |
| Dec. 5 | Fog | 13° /10° | 0 mm | 2.3 | |
| Dec. 6 |  Light rain | 12° /9° | 2.7 mm | 2.3 | |
| Dec. 7 |  Patchy rain possible | 12° /9° | 1.1 mm | 2.2 | |
| Dec. 8 | Fog | 11° /7° | 0 mm | 2.2 | |
| Dec. 9 |  Overcast | 13° /7° | 0 mm | 2.2 | |
| Dec. 10 | Overcast | 13° /7° | 0 mm | 2.2 | |
| Dec. 11 | Overcast | 14° /8° | 0 mm | 2.2 | |
| Dec. 12 |  Moderate rain | 14° /9° | 11.6 mm | 2.2 | |
| Dec. 13 | Overcast | 13° /9° | 0 mm | 2.2 | |
| Dec. 14 |  Heavy rain | 13° /8° | 32.3 mm | 2.2 | |
| Dec. 15 | Fog | 12° /7° | 0 mm | 2.1 | |
| Dec. 16 | Light rain | 14° /9° | 3.1 mm | 2.1 | |
| Dec. 17 | Patchy rain possible | 14° /10° | 1.8 mm | 2.1 | |
| Dec. 18 | Light rain | 13° /9° | 5.8 mm | 2.1 | |
| Dec. 19 | Light rain | 13° /10° | 5.5 mm | 2.1 | |
| Dec. 20 | Moderate rain | 13° /10° | 15.7 mm | 2.1 | |
| Dec. 21 | Heavy rain | 14° /11° | 53.3 mm | 2.1 | |
| Dec. 22 | Moderate rain | 14° /11° | 15.5 mm | 2.1 | |
| Dec. 23 | Patchy rain possible | 14° /11° | 1.1 mm | 2.1 | |
| Dec. 24 | Moderate rain | 14° /10° | 22.7 mm | 2.1 | |
| Dec. 25 | Moderate rain | 14° /9° | 11.4 mm | 2.1 | |
| Dec. 26 | Light rain | 13° /10° | 5.2 mm | 2.1 | |
| Dec. 27 | Moderate rain | 13° /10° | 17.6 mm | 2.1 | |
| Dec. 28 |  Sunny | 12° /9° | 0.2 mm | 2.2 | |
| Dec. 29 | Light rain | 13° /9° | 6.5 mm | 2.2 | |
| Dec. 30 | Light rain | 12° /9° | 3.8 mm | 2.2 | |
| Dec. 31 | Heavy rain | 11° /9° | 32.6 mm | 2 | |
| Next | |||||
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.
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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 249.6 mm is expected in Alameda County during December, occurring over more than 9 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 💧
Typically, Alameda County has 9 rainy days in December with a total of 249.6 mm of rainfall.
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