Mercer County (Princeton)
December
Weather in Mercer County for December 2025
Your guide to Mercer County weather in December - trends and predictions
With an average of 2 snowy days, Mercer County usually enjoys a light touch of snow in December.
In general, the average temperature in Mercer County at the beginning of December is 2.9 °F. As the month progressed, temperatures tended to significantly warm up, reaching an average of 8 °F by the end of December.
Mercer County experiences moderate rainfall in December, with an average of 7 rainy days and a total precipitation of 158.4 mm.
New! Chat with our AI weatherman - it’s amazing and free.
Snow Forecast ❄️
Temperatures
Rain 🌧️
More
22
Dry days
7
Rainy days
2
Snow days
7°/1°
Temperatures
17 km/h
Avg max wind
71 %
Avg humidity
Mercer County in December average weather
Move between months or click on a day
| Sun. | Mon. | Tue. | Wed. | Thu. | Fri. | Sat. |
|---|---|---|---|---|---|---|
| 1  2° | 2  4° | 3 4° | 4 1° | 5  3° | 6  2° | |
| 7  4° | 8 8° | 9  8° | 10  13° | 11 12° | 12 6° | 13 3° |
| 14 3° | 15 6° | 16 10° | 17  12° | 18  11° | 19  5° | 20 5° |
| 21 4° | 22 1° | 23 3° | 24 4° | 25 6° | 26 6° | 27 7° |
| 28 8° | 29 12° | 30 10° | 31 7° |
You can click on date
Access Mercer County weather forecasts with a simple click. Select any date for comprehensive insights on temperature, rainfall, and wind conditions.
Temperatures trend during December in Mercer County
See the weather trend as well as the moving average line
December weather day by day
Click on a date for more information
| Date | Weather | Temperatures | Rain | Snow | More |
|---|---|---|---|---|---|
| Dec. 1 | Overcast | 2° /-3° | 0 mm | 0 cm | |
| Dec. 2 | Sunny | 4° /-4° | 0 mm | 0 cm | |
| Dec. 3 | Sunny | 4° /-3° | 0 mm | 0 cm | |
| Dec. 4 | Overcast | 1° /-4° | 0 mm | 0 cm | |
| Dec. 5 | Heavy snow | 3° /-2° | 20.1 mm | 6.7 cm | |
| Dec. 6 | Cloudy | 2° /-3° | 0 mm | 0 cm | |
| Dec. 7 | Partly cloudy | 4° /-3° | 0 mm | 0 cm | |
| Dec. 8 | Overcast | 8° /0° | 0 mm | 0 cm | |
| Dec. 9 | Fog | 8° /0° | 12.3 mm | 0 cm | |
| Dec. 10 | Light rain shower | 13° /4° | 16 mm | 0 cm | |
| Dec. 11 | Heavy snow | 12° /4° | 42.8 mm | 0.5 cm | |
| Dec. 12 | Partly cloudy | 6° /-1° | 4.4 mm | 0 cm | |
| Dec. 13 | Overcast | 3° /-2° | 0 mm | 0 cm | |
| Dec. 14 | Cloudy | 3° /-3° | 0 mm | 0 cm | |
| Dec. 15 | Sunny | 6° /-2° | 0 mm | 0 cm | |
| Dec. 16 | Overcast | 10° /2° | 7.3 mm | 0 cm | |
| Dec. 17 | Light rain | 12° /5° | 18.5 mm | 0 cm | |
| Dec. 18 | Moderate rain | 11° /3° | 24.2 mm | 0 cm | |
| Dec. 19 | Light snow showers | 5° /0° | 2.7 mm | 0 cm | |
| Dec. 20 | Sunny | 5° /-1° | 9.5 mm | 0 cm | |
| Dec. 21 | Sunny | 4° /-2° | 0 mm | 0 cm | |
| Dec. 22 | Overcast | 1° /-5° | 0 mm | 0 cm | |
| Dec. 23 | Overcast | 3° /-5° | 0 mm | 0 cm | |
| Dec. 24 | Light drizzle | 4° /0° | 0.3 mm | 0 cm | |
| Dec. 25 | Cloudy | 6° /1° | 0 mm | 0 cm | |
| Dec. 26 | Mist | 6° /-3° | 0 mm | 0 cm | |
| Dec. 27 | Moderate rain | 7° /1° | 11.7 mm | 0 cm | |
| Dec. 28 | Fog | 8° /4° | 31.7 mm | 0 cm | |
| Dec. 29 | Patchy rain possible | 12° /6° | 0.9 mm | 0 cm | |
| Dec. 30 | Overcast | 10° /4° | 19.2 mm | 0 cm | |
| Dec. 31 | Sunny | 7° /-1° | 0 mm | 0 cm | |
| Next | |||||
Important Notice
Our weather forecast for Mercer 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 Mercer County forecast closer to your planned date for the most up-to-date weather information.
Mercer County in December - FAQ
What are the expected maximum and minimum temperatures in Mercer County during December?
Prepare for cooler days with highs just around 7° and colder nights, dipping below 1°.
How much rainfall should be expected in Mercer County during December?
Significant rainfall exceeding 158.4 mm is expected in Mercer County during December, occurring over more than 7 days. Preparing for wet conditions is recommended in your planning.
Will it snow in Mercer County in December 2025?
Mercer County experiences an average snowfall of 7.69 cm during December, occurring over 2 days.
What are the typical wind conditions in Mercer County during December?
The average wind speed in Mercer County during December is 17 km/h, suggesting breezy to windy conditions, depending on your activities.
Mercer County snow forecast December 2025
Track daily snowfall levels and discover Mercer County’s snowy potential this December ❄️
December rainfall patterns in Mercer County
Explore the daily rainfall trends and prepare for Mercer Countys December weather 💧
Top locations in Mercer County
Select a location for an accurate weather forecast
More Locations Quick links
You are here
Where is Mercer County?Get accurate weather forecasts for Mercer County, located at latitude 40.349 and longitude -74.659. Stay updated with localized weather information tailored for Mercer County.
Found a mistake?
We appreciate your attention to details. Tell us here.