Cobb County (Marietta)
December
Weather in Cobb County, Georgia for December 2026
Your guide to Cobb County weather in December - trends and predictions
In general, the average temperature in Cobb County at the beginning of December is 6.3 °F. As the month progressed, temperatures tended to significantly warm up, reaching an average of 13.7 °F by the end of December.
Cobb County experiences moderate rainfall in December, with an average of 8 rainy days and a total precipitation of 283.5 mm.
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Temperatures
Rain 🌧️
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23
Dry days
8
Rainy days
0
Snow days
11°/4°
Temperatures
15 km/h
Avg max wind
77 %
Avg humidity
Cobb County Weather December
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Temperatures trend during December in Cobb County
See the weather trend as well as the moving average line
December weather in Cobb County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Dec. 1 |  Overcast | 7° /2° | 0 mm | 1 | |
| Dec. 2 |  Heavy rain | 5° /1° | 181 mm | 0 | |
| Dec. 3 | Overcast | 2° /0° | 0 mm | 1 | |
| Dec. 4 |  Freezing fog | 8° /0° | 0 mm | 0 | |
| Dec. 5 |  Moderate or heavy rain shower | 6° /2° | 37.7 mm | 1 | |
| Dec. 6 |  Fog | 9° /7° | 0 mm | 0 | |
| Dec. 7 | Fog | 7° /3° | 0 mm | 0 | |
| Dec. 8 |  Light rain | 10° /5° | 6.7 mm | 1 | |
| Dec. 9 | Overcast | 6° /2° | 0 mm | 1 | |
| Dec. 10 | Fog | 13° /1° | 0 mm | 1 | |
| Dec. 11 | Overcast | 7° /1° | 0 mm | 1 | |
| Dec. 12 |  Sunny | 14° /3° | 0 mm | 1 | |
| Dec. 13 | Fog | 10° /4° | 1.3 mm | 0 | |
| Dec. 14 | Overcast | 13° /-3° | 8.9 mm | 1 | |
| Dec. 15 | Sunny | 5° /-6° | 0 mm | 1 | |
| Dec. 16 | Sunny | 11° /-1° | 0 mm | 1 | |
| Dec. 17 | Overcast | 8° /3° | 0 mm | 0 | |
| Dec. 18 | Moderate or heavy rain shower | 11° /8° | 37.8 mm | 0 | |
| Dec. 19 |  Light rain shower | 14° /7° | 6 mm | 1 | |
| Dec. 20 | Sunny | 12° /2° | 0 mm | 1 | |
| Dec. 21 | Overcast | 14° /6° | 0 mm | 1 | |
| Dec. 22 | Sunny | 11° /4° | 0 mm | 1 | |
| Dec. 23 | Overcast | 14° /7° | 0 mm | 0 | |
| Dec. 24 | Fog | 17° /12° | 0 mm | 0 | |
| Dec. 25 | Fog | 17° /13° | 0 mm | 0 | |
| Dec. 26 | Fog | 14° /13° | 0 mm | 0 | |
| Dec. 27 | Mist | 18° /15° | 0 mm | 0 | |
| Dec. 28 | Mist | 17° /14° | 0 mm | 0 | |
| Dec. 29 |  Heavy rain at times | 15° /1° | 4.1 mm | 1 | |
| Dec. 30 | Sunny | 5° /-3° | 0 mm | 1 | |
| Dec. 31 |  Partly cloudy | 10° /-2° | 0 mm | 1 | |
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Important Notice
Our weather forecast for Cobb 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 Cobb County forecast closer to your planned date for the most up-to-date weather information.
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Cobb County in December - FAQ
What are the expected maximum and minimum temperatures in Cobb County during December?
Prepare for cooler days with highs just around 11° and colder nights, dipping below 4°.
How much rainfall should be expected in Cobb County during December?
Significant rainfall exceeding 283.5 mm is expected in Cobb 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 Cobb County during December?
The average wind speed in Cobb County during December is 15 km/h, suggesting breezy to windy conditions, depending on your activities.
December rainfall patterns in Cobb County
Explore the daily rainfall trends and prepare for Cobb Countys December weather 💧
Typically, Cobb County has 8 rainy days in December with a total of 283.5 mm of rainfall.
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Where is Cobb County?Get accurate weather forecasts for Cobb County, located at latitude 33.953 and longitude -84.55. Stay updated with localized weather information tailored for Cobb County.
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