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United States weather

Weather in New Castle County, Delaware for March 2026

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

    Temperatures

  • Until now, March 2026 in New Castle County has been nearly identical to the historical average, with a temperature of 11.5 °F (showing only a slight deviation of -0.5 °F).

  • Expect cooler weather in the next days in New Castle County with the forecast suggesting a temperature of 19.3 °F, lower than the historical average.

  • In general, the average temperature in New Castle County at the beginning of March is 9.3 °F. As the month progressed, temperatures tended to significantly warm up, reaching an average of 15.4 °F by the end of March.

    • Rain 🌧️

  • The climate of New Castle County in March is notably wet, with an average of 12 rainy days, and a total of 160.6 mm of precipitation.

    • More

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

Average dry days
19
Dry days
Average rainy days
12
Rainy days
Average snowy days
0
Snow days
Average temperatures
12°/4°
Temperatures
Average wind speed
22 km/h
Avg max wind
Average humidity
67 %
Avg humidity

New Castle County Weather March

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

Temperatures trend during March in New Castle County

See the weather trend as well as the moving average line

March weather in New Castle County day by day

Click on a date for more information
February April
Date Weather Temperatures Rain UV More
Mar. 1 Overcast
Overcast
 7° /0° 0.2 mm 2
Mar. 2 Light rain
Light rain
 3° /-3° 5.6 mm 2
Mar. 3 Partly cloudy
Partly cloudy
 8° /-1° 2.6 mm 2
Mar. 4 Cloudy
Cloudy
 13° /4° 10.3 mm 3
Mar. 5 Moderate rain
Moderate rain
 11° /6° 23.7 mm 2
Mar. 6 Moderate rain
Moderate rain
 12° /4° 16.3 mm 3
Mar. 7 Patchy rain possible
Patchy rain possible
 11° /4° 0 mm 3
Mar. 8 Overcast
Overcast
 10° /2° 0 mm 3
Mar. 9 Patchy rain possible
Patchy rain possible
 15° /2° 0.7 mm 3
Mar. 10 Patchy rain possible
Patchy rain possible
 16° /3° 0.4 mm 3
Mar. 11 Cloudy
Cloudy
 16° /4° 0 mm 3
Mar. 12 Cloudy
Cloudy
 17° /3° 0 mm 3
Mar. 13 Overcast
Overcast
 11° /3° 0 mm 3
Mar. 14 Sunny
Sunny
 14° /5° 0 mm 4
Mar. 15 Moderate or heavy rain with thunder
Moderate or heavy rain with thunder
 13° /6° 2.6 mm 3
Mar. 16 Sunny
Sunny
 18° /6° 15.3 mm 3
Mar. 17 Partly cloudy
Partly cloudy
 11° /3° 17.8 mm 4
Mar. 18 Partly cloudy
Partly cloudy
 9° /-1° 0 mm 4
Mar. 19 Overcast
Overcast
 11° /1° 0 mm 3
Mar. 20 Light rain shower
Light rain shower
 14° /3° 4.6 mm 4
Mar. 21 Cloudy
Cloudy
 10° /1° 3.2 mm 3
Mar. 22 Partly cloudy
Partly cloudy
 14° /2° 0 mm 3
Mar. 23 Heavy rain
Heavy rain
 11° /1° 25.9 mm 2
Mar. 24 Sunny
Sunny
 10° /1° 22.4 mm 4
Mar. 25 Sunny
Sunny
 13° /1° 0 mm 4
Mar. 26 Overcast
Overcast
 13° /3° 0 mm 2
Mar. 27 Light drizzle
Light drizzle
 14° /3° 2.6 mm 3
Mar. 28 Moderate rain
Moderate rain
 11° /3° 3.6 mm 4
Mar. 29 Partly cloudy
Partly cloudy
 16° /7° 0 mm 5
Mar. 30 Patchy rain possible
Patchy rain possible
 15° /7° 1.7 mm 0.6
Mar. 31 Partly cloudy
Partly cloudy
 26° /12° 0 mm 1.4
Next
Important Notice
Our weather forecast for New Castle County in March 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 March - FAQ

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

Prepare for cooler days with highs just around 12° and colder nights, dipping below 4°.

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

Significant rainfall exceeding 160.6 mm is expected in New Castle County during March, occurring over more than 12 days. Preparing for wet conditions is recommended in your planning.

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

The average wind speed in New Castle County during March is 22 km/h, suggesting breezy to windy conditions, depending on your activities.

March rainfall patterns in New Castle County

Explore the daily rainfall trends and prepare for New Castle Countys March weather 💧
Typically, New Castle County has 12 rainy days in March with a total of 160.6 mm of rainfall.

UV exposure in New Castle County during March

Stay informed about UV levels for safe outdoor activities throughout the month of March ☀️
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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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