Collin County (Plano)
December
Weather in Collin County for December 2025
Your guide to Collin County weather in December - trends and predictions
In general, the average temperature in Collin County at the beginning of December is 15.4 °F. As the month progressed, temperatures tended to moderately fall, reaching an average of 14.6 °F by the end of December.
The climate of Collin County in December is notably wet, with an average of 14 rainy days, and a total of 117.4 mm of precipitation.
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Temperatures
Rain 🌧️
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17
Dry days
14
Rainy days
0
Snow days
14°/6°
Temperatures
22 km/h
Avg max wind
64 %
Avg humidity
Collin County Weather December
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| Sun. | Mon. | Tue. | Wed. | Thu. | Fri. | Sat. |
|---|---|---|---|---|---|---|
| 1  15° | 2  19° | 3  17° | 4 13° | 5 16° | 6 14° | |
| 7 14° | 8  19° | 9 14° | 10 12° | 11 15° | 12 15° | 13 12° |
| 14 18° | 15 17° | 16 16° | 17 17° | 18 15° | 19 10° | 20 15° |
| 21  14° | 22 13° | 23  9° | 24 12° | 25 10° | 26 14° | 27 12° |
| 28 16° | 29 15° | 30 18° | 31 17° |
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Temperatures trend during December in Collin 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 | Overcast | 15° /5° | 0 mm | 4 | |
| Dec. 2 | Fog | 19° /4° | 0 mm | 5 | |
| Dec. 3 | Sunny | 17° /2° | 0 mm | 5 | |
| Dec. 4 | Sunny | 13° /6° | 18 mm | 4 | |
| Dec. 5 | Sunny | 16° /5° | 0 mm | 5 | |
| Dec. 6 | Sunny | 14° /2° | 0 mm | 4 | |
| Dec. 7 | Overcast | 14° /5° | 9.6 mm | 3 | |
| Dec. 8 | Patchy rain possible | 19° /10° | 6.9 mm | 4 | |
| Dec. 9 | Fog | 14° /9° | 0 mm | 4 | |
| Dec. 10 | Sunny | 12° /2° | 0 mm | 4 | |
| Dec. 11 | Sunny | 15° /3° | 0 mm | 5 | |
| Dec. 12 | Overcast | 15° /6° | 0 mm | 4 | |
| Dec. 13 | Patchy rain possible | 12° /8° | 3.2 mm | 3 | |
| Dec. 14 | Overcast | 18° /9° | 4.5 mm | 5 | |
| Dec. 15 | Light rain shower | 17° /9° | 11.9 mm | 4 | |
| Dec. 16 | Sunny | 16° /9° | 2.6 mm | 4 | |
| Dec. 17 | Sunny | 17° /9° | 2.3 mm | 5 | |
| Dec. 18 | Sunny | 15° /6° | 13.2 mm | 4 | |
| Dec. 19 | Overcast | 10° /3° | 0 mm | 3 | |
| Dec. 20 | Overcast | 15° /6° | 0 mm | 4 | |
| Dec. 21 | Light rain | 14° /6° | 5.2 mm | 4 | |
| Dec. 22 | Overcast | 13° /2° | 0.8 mm | 3 | |
| Dec. 23 | Partly cloudy | 9° /4° | 1.1 mm | 3 | |
| Dec. 24 | Overcast | 12° /7° | 21.7 mm | 3 | |
| Dec. 25 | Sunny | 10° /4° | 1.4 mm | 3 | |
| Dec. 26 | Sunny | 14° /5° | 15 mm | 4 | |
| Dec. 27 | Overcast | 12° /3° | 0 mm | 3 | |
| Dec. 28 | Overcast | 16° /6° | 0 mm | 4 | |
| Dec. 29 | Patchy rain possible | 15° /7° | 0.1 mm | 4 | |
| Dec. 30 | Overcast | 18° /8° | 0 mm | 4 | |
| Dec. 31 | Sunny | 17° /8° | 0 mm | 5 | |
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Important Notice
Our weather forecast for Collin 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 Collin County forecast closer to your planned date for the most up-to-date weather information.
Collin County in December - FAQ
What are the expected maximum and minimum temperatures in Collin County during December?
During December, expect a variety of temperatures with highs around 14° and lows near 6°, suitable for diverse activities and preferences.
How much rainfall should be expected in Collin County during December?
Significant rainfall exceeding 117.4 mm is expected in Collin County during December, occurring over more than 14 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Collin County during December?
The average wind speed in Collin County during December is 22 km/h, suggesting breezy to windy conditions, depending on your activities.
December rainfall patterns in Collin County
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