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Weather in New Castle County, Delaware for January 2026

Your guide to New Castle County weather in January - trends and predictions

    Snow Forecast ❄️

  • New Castle County typically experiences moderate snowfall in January, with an average of 7 snowy days.
    According to New Castle County snow forecast for January 2026, 2 snowy days are expected in the next 2 weeks. The closest date with snow is Thursday, January 15.

    • Temperatures

  • Until now, January 2026 in New Castle County is slightly cooler than the historical average by -1 °F.

  • The forecast for the next days in New Castle County predicts temperatures to be around 4 °F, close to the historical average.

  • In general, the average temperature in New Castle County at the beginning of January is 3.6 °F. As the month progressed, temperatures tended to noticeably warm up, reaching an average of 5.9 °F by the end of January.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
15
Dry days
Average rainy days
9
Rainy days
Average snowy days
7
Snow days
Average temperatures
3°/-3°
Temperatures
Average wind speed
21 km/h
Avg max wind
Average humidity
75 %
Avg humidity

New Castle County Weather January

Move between months or click on a day
December
February
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Patchy rain possible
5°
2
Sunny
4°
3
Partly cloudy
4°
4
Patchy rain possible
4°
5
Overcast
2°
6
Light sleet
2°
7
Fog
4°
8
Sunny
3°
9
Patchy rain possible
15°
10
Heavy rain
10°
11
Moderate rain
8°
12
Sunny
5°
13
Sunny
7°
14
Patchy rain possible
9°
15
Moderate snow
1°
16
Sunny
-6°
17
Sunny
-2°
18
Moderate or heavy snow showers
1°
19
Patchy rain possible
4°
20
Partly cloudy
-2°
21
Cloudy
3°
22
Light freezing rain
1°
23
Freezing fog
0°
24
Light drizzle
3°
25
Moderate rain
7°
26
Light drizzle
7°
27
Overcast
7°
28
Moderate rain
4°
29
Overcast
5°
30
Cloudy
4°
31
Patchy rain possible
7°

Temperatures trend during January in New Castle County

See the weather trend as well as the moving average line

January weather in New Castle County day by day

Click on a date for more information
December February
Date Weather Temperatures Rain Snow More
Jan. 1 Patchy rain possible
Patchy rain possible
 5° /0° 2.3 mm 0 cm
Jan. 2 Sunny
Sunny
 4° /-2° 0 mm 0 cm
Jan. 3 Partly cloudy
Partly cloudy
 4° /-3° 0.4 mm 0.3 cm
Jan. 4 Patchy rain possible
Patchy rain possible
 4° /-3° 0 mm 0 cm
Jan. 5 Overcast
Overcast
 2° /-4° 0 mm 0 cm
Jan. 6 Light sleet
Light sleet
 2° /-2° 12.5 mm 4.9 cm
Jan. 7 Fog
Fog
 4° /-2° 0.7 mm 0.4 cm
Jan. 8 Sunny
Sunny
 3° /-2° 0 mm 0 cm
Jan. 9 Patchy rain possible
Patchy rain possible
 15° /0° 1.5 mm 0 cm
Jan. 10 Heavy rain
Heavy rain
 10° /7° 62.2 mm 0 cm
Jan. 11 Moderate rain
Moderate rain
 8° /0° 8.2 mm 0 cm
Jan. 12 Sunny
Sunny
 5° /-1° 0.1 mm 0 cm
Jan. 13 Sunny
Sunny
 7° /-1° 0 mm 0 cm
Jan. 14 Patchy rain possible
Patchy rain possible
 9° /2° 0.2 mm 0 cm
Jan. 15 Moderate snow
Moderate snow
 1° /-5° 1.3 mm 1 cm
Jan. 16 Sunny
Sunny
 -6° /-10° 0 mm 0 cm
Jan. 17 Sunny
Sunny
 -2° /-11° 0 mm 0 cm
Jan. 18 Moderate or heavy snow showers
Moderate or heavy snow showers
 1° /-5° 8.3 mm 0.2 cm
Jan. 19 Patchy rain possible
Patchy rain possible
 4° /0° 3.1 mm 0 cm
Jan. 20 Partly cloudy
Partly cloudy
 -2° /-5° 0 mm 0 cm
Jan. 21 Cloudy
Cloudy
 3° /-3° 0.1 mm 0 cm
Jan. 22 Light freezing rain
Light freezing rain
 1° /0° 1.8 mm 0 cm
Jan. 23 Freezing fog
Freezing fog
 0° /-8° 0 mm 0 cm
Jan. 24 Light drizzle
Light drizzle
 3° /-4° 1.9 mm 0 cm
Jan. 25 Moderate rain
Moderate rain
 7° /-2° 4.4 mm 0 cm
Jan. 26 Light drizzle
Light drizzle
 7° /2° 0.5 mm 0 cm
Jan. 27 Overcast
Overcast
 7° /0° 1.8 mm 0 cm
Jan. 28 Moderate rain
Moderate rain
 4° /0° 13.5 mm 0 cm
Jan. 29 Overcast
Overcast
 5° /0° 0 mm 0 cm
Jan. 30 Cloudy
Cloudy
 4° /-2° 0 mm 0 cm
Jan. 31 Patchy rain possible
Patchy rain possible
 7° /1° 14.4 mm 0 cm
Next
Important Notice
Our weather forecast for New Castle County in January 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.
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New Castle County in January - FAQ

What are the expected maximum and minimum temperatures in New Castle County during January?

Brace for cold days with temperatures not exceeding 3° and nights that are likely to be freezing. Winter clothing is essential for comfort and safety.

How much rainfall should be expected in New Castle County during January?

Significant rainfall exceeding 100.9 mm is expected in New Castle County during January, occurring over more than 9 days. Preparing for wet conditions is recommended in your planning.

Will it snow in New Castle County in January 2026?

New Castle County experiences an average snowfall of 17.57 cm during January, occurring over 7 days.

What are the typical wind conditions in New Castle County during January?

The average wind speed in New Castle County during January is 21 km/h, suggesting breezy to windy conditions, depending on your activities.

New Castle County snow forecast January 2026

Track daily snowfall levels and discover New Castle County’s snowy potential this January ❄️
On average, New Castle County sees 7 snowy days during January, with approximately 17.6 cm of total snowfall.

January rainfall patterns in New Castle County

Explore the daily rainfall trends and prepare for New Castle Countys January weather 💧
Typically, New Castle County has 9 rainy days in January with a total of 100.9 mm of rainfall.
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Location coordinates 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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