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Delaware United States

Weather in New Castle County for July 2025

Your guide to New Castle County weather in July - trends and predictions
  • In general, the average temperature in New Castle County at the beginning of July is 29 °F. As the month progressed, temperatures tended to slightly decrease, reaching an average of 28.9 °F by the end of July.

  • Expect significant rainfall in New Castle County during July, with an average of 19 rainy days.

  • New! Chat with our AI weatherman - it’s amazing and free.
Average dry days
12
Dry days
Average rainy days
19
Rainy days
Average snowy days
0
Snow days
Average temperatures
30°/20°
Temperatures
Average wind speed
14 km/h
Avg max wind
Average humidity
72 %
Avg humidity

New Castle County in July average weather

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Temperatures trend during July in New Castle County

See the weather trend as well as the moving average line

July weather day by day

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Date Weather Temperatures Rain UV More
Jul. 1 Partly cloudy
Partly cloudy
25° /15° 0 mm 7
Jul. 2 Sunny
Sunny
28° /15° 0 mm 7
Jul. 3 Sunny
Sunny
28° /15° 0 mm 7
Jul. 4 Patchy light drizzle
Patchy light drizzle
28° /18° 6.5 mm 6
Jul. 5 Light rain shower
Light rain shower
30° /22° 8.8 mm 7
Jul. 6 Fog
Fog
32° /23° 1.6 mm 7
Jul. 7 Sunny
Sunny
32° /22° 0.1 mm 8
Jul. 8 Patchy rain possible
Patchy rain possible
31° /22° 0.4 mm 7
Jul. 9 Light rain shower
Light rain shower
31° /23° 2.2 mm 7
Jul. 10 Patchy rain possible
Patchy rain possible
34° /23° 0.3 mm 7
Jul. 11 Partly cloudy
Partly cloudy
31° /22° 1.7 mm 8
Jul. 12 Light rain shower
Light rain shower
27° /20° 1.9 mm 6
Jul. 13 Fog
Fog
31° /21° 2 mm 7
Jul. 14 Partly cloudy
Partly cloudy
32° /21° 0 mm 8
Jul. 15 Thundery outbreaks possible
Thundery outbreaks possible
35° /22° 3.2 mm 8
Jul. 16 Sunny
Sunny
34° /22° 2.1 mm 8
Jul. 17 Patchy rain possible
Patchy rain possible
33° /22° 5.3 mm 7
Jul. 18 Partly cloudy
Partly cloudy
28° /20° 3.7 mm 7
Jul. 19 Sunny
Sunny
28° /18° 0 mm 7
Jul. 20 Cloudy
Cloudy
23° /19° 0 mm 5
Jul. 21 Patchy rain possible
Patchy rain possible
30° /18° 0 mm 7
Jul. 22 Light rain shower
Light rain shower
25° /20° 6.9 mm 6
Jul. 23 Fog
Fog
31° /20° 1.5 mm 7
Jul. 24 Moderate or heavy rain shower
Moderate or heavy rain shower
26° /21° 16.4 mm 6
Jul. 25 Light rain shower
Light rain shower
27° /20° 9 mm 6
Jul. 26 Overcast
Overcast
26° /16° 0.1 mm 6
Jul. 27 Sunny
Sunny
29° /17° 0 mm 7
Jul. 28 Sunny
Sunny
30° /18° 0 mm 8
Jul. 29 Patchy rain possible
Patchy rain possible
31° /21° 0.1 mm 7
Jul. 30 Light rain shower
Light rain shower
27° /20° 9 mm 6
Jul. 31 Fog
Fog
32° /21° 11.3 mm 7
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Important Notice
Our weather forecast for New Castle County in July 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 July - FAQ

What are the expected maximum and minimum temperatures in New Castle County during July?
Expect warm days with temperatures around 30°, cooling to mild conditions of 20° after sunset. Perfect for those who enjoy warm weather.
How much rainfall should be expected in New Castle County during July?
Moderate rainfall is anticipated in New Castle County during July, with a total of 94.1 mm spread over approximately 19 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in New Castle County during July?
The average wind speed in New Castle County during July is 14 km/h, suggesting breezy to windy conditions, depending on your activities.

July rainfall patterns in New Castle County

Explore the daily rainfall trends and prepare for New Castle Countys July weather 💧

UV exposure in New Castle County during July

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