New Castle County (Newark)
December
Weather in New Castle County for December 2025
Your guide to New Castle County weather in December - trends and predictions
Snowfall in New Castle County during December is quite rare, with fewer than 2 snowy days on average.
In general, the average temperature in New Castle County at the beginning of December is 6.3 °F. As the month progressed, temperatures tended to noticeably warm up, reaching an average of 9.1 °F by the end of December.
New Castle County experiences moderate rainfall in December, with an average of 10 rainy days and a total precipitation of 158.3 mm.
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Snow Forecast ❄️
Temperatures
Rain 🌧️
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20
Dry days
10
Rainy days
1
Snow days
8°/2°
Temperatures
18 km/h
Avg max wind
74 %
Avg humidity
New Castle County in December average weather
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| Sun. | Mon. | Tue. | Wed. | Thu. | Fri. | Sat. |
|---|---|---|---|---|---|---|
| 1  6° | 2 8° | 3  10° | 4  7° | 5 5° | 6 4° | |
| 7 4° | 8  12° | 9 9° | 10 13° | 11  10° | 12 5° | 13 3° |
| 14  3° | 15  6° | 16 10° | 17  13° | 18  11° | 19 5° | 20 5° |
| 21 4° | 22 2° | 23 3° | 24 6° | 25 6° | 26 7° | 27  8° |
| 28 10° | 29 14° | 30 10° | 31 9° |
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Temperatures trend during December in New Castle 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 | Snow | More |
|---|---|---|---|---|---|
| Dec. 1 | Mist | 6° /-1° | 1.3 mm | 0 cm | |
| Dec. 2 | Fog | 8° /0° | 0 mm | 0 cm | |
| Dec. 3 | Light rain shower | 10° /2° | 12.3 mm | 0 cm | |
| Dec. 4 | Overcast | 7° /-1° | 0 mm | 0 cm | |
| Dec. 5 | Mist | 5° /-1° | 0 mm | 0 cm | |
| Dec. 6 | Patchy rain possible | 4° /-2° | 0 mm | 0 cm | |
| Dec. 7 | Overcast | 4° /-3° | 0 mm | 0 cm | |
| Dec. 8 | Partly cloudy | 12° /0° | 0 mm | 0 cm | |
| Dec. 9 | Fog | 9° /0° | 10.8 mm | 0 cm | |
| Dec. 10 | Light rain shower | 13° /3° | 14.9 mm | 0 cm | |
| Dec. 11 | Moderate snow | 10° /2° | 56.8 mm | 0 cm | |
| Dec. 12 | Partly cloudy | 5° /-1° | 0 mm | 0 cm | |
| Dec. 13 | Overcast | 3° /-1° | 0 mm | 0 cm | |
| Dec. 14 | Cloudy | 3° /-4° | 0 mm | 0 cm | |
| Dec. 15 | Sunny | 6° /-2° | 0 mm | 0 cm | |
| Dec. 16 | Overcast | 10° /2° | 3.5 mm | 0 cm | |
| Dec. 17 | Light rain | 13° /6° | 21.5 mm | 0 cm | |
| Dec. 18 | Moderate rain | 11° /2° | 19.8 mm | 0 cm | |
| Dec. 19 | Overcast | 5° /0° | 2.1 mm | 0.1 cm | |
| Dec. 20 | Sunny | 5° /-2° | 0 mm | 0 cm | |
| Dec. 21 | Sunny | 4° /-2° | 1.5 mm | 1.1 cm | |
| Dec. 22 | Overcast | 2° /-4° | 0 mm | 0 cm | |
| Dec. 23 | Overcast | 3° /-4° | 0 mm | 0 cm | |
| Dec. 24 | Light drizzle | 6° /0° | 2.7 mm | 0.8 cm | |
| Dec. 25 | Partly cloudy | 6° /2° | 0 mm | 0 cm | |
| Dec. 26 | Patchy rain possible | 7° /0° | 0 mm | 0 cm | |
| Dec. 27 | Heavy rain | 8° /2° | 18.3 mm | 0 cm | |
| Dec. 28 | Fog | 10° /5° | 29.6 mm | 0 cm | |
| Dec. 29 | Patchy rain possible | 14° /5° | 0.8 mm | 0 cm | |
| Dec. 30 | Overcast | 10° /4° | 19.8 mm | 0 cm | |
| Dec. 31 | Partly cloudy | 9° /0° | 0 mm | 0 cm | |
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Important Notice
Our weather forecast for New Castle 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 New Castle County forecast closer to your planned date for the most up-to-date weather information.
New Castle County in December - FAQ
What are the expected maximum and minimum temperatures in New Castle County during December?
Prepare for cooler days with highs just around 8° and colder nights, dipping below 2°.
How much rainfall should be expected in New Castle County during December?
Significant rainfall exceeding 158.3 mm is expected in New Castle County during December, occurring over more than 10 days. Preparing for wet conditions is recommended in your planning.
Will it snow in New Castle County in December 2025?
New Castle County typically sees 0.25 cm of snowfall during December.
What are the typical wind conditions in New Castle County during December?
The average wind speed in New Castle County during December is 18 km/h, suggesting breezy to windy conditions, depending on your activities.
New Castle County snow forecast December 2025
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December rainfall patterns in New Castle County
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Where is New Castle County?Get accurate weather forecasts for New Castle County, located at latitude 39.684 and longitude -75.75. Stay updated with localized weather information tailored for New Castle County.
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