New Castle County (Wilmington)
May
Weather in New Castle County, Delaware for May 2027
Your guide to New Castle County weather in May - trends and predictions
In general, the average temperature in New Castle County at the beginning of May is 21.1 °F. As the month progressed, temperatures tended to moderately rise, reaching an average of 21.9 °F by the end of May.
New Castle County experiences heavy rainfall in May, with over 20 rainy days and an average total precipitation 201.2 mm.
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Temperatures
Rain 🌧️
More
10
Dry days
21
Rainy days
0
Snow days
21°/12°
Temperatures
18 km/h
Avg max wind
72 %
Avg humidity
New Castle County Weather May
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Temperatures trend during May in New Castle County
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May weather in New Castle County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| May 1 |  Cloudy | 19° /8° | 0 mm | 9 | |
| May 2 |  Overcast | 21° /10° | 0.5 mm | 8 | |
| May 3 |  Moderate or heavy rain shower | 22° /11° | 4.7 mm | 9 | |
| May 4 | Moderate or heavy rain shower | 21° /12° | 6.5 mm | 7 | |
| May 5 | Moderate or heavy rain shower | 23° /15° | 2 mm | 6 | |
| May 6 | Moderate or heavy rain shower | 21° /15° | 9.9 mm | 4 | |
| May 7 | Overcast | 21° /11° | 6.1 mm | 7 | |
| May 8 |  Patchy rain possible | 21° /10° | 0.4 mm | 8 | |
| May 9 | Moderate or heavy rain shower | 17° /10° | 8.2 mm | 4 | |
| May 10 |  Sunny | 23° /9° | 5.2 mm | 10 | |
| May 11 |  Partly cloudy | 19° /10° | 0 mm | 7 | |
| May 12 | Overcast | 22° /10° | 0 mm | 9 | |
| May 13 | Moderate or heavy rain shower | 22° /13° | 9 mm | 5 | |
| May 14 | Moderate or heavy rain shower | 17° /12° | 6.1 mm | 3 | |
| May 15 | Moderate or heavy rain shower | 20° /13° | 5.9 mm | 4 | |
| May 16 | Moderate or heavy rain shower | 25° /13° | 1.9 mm | 6 | |
| May 17 | Moderate rain at times | 28° /18° | 0.5 mm | 7 | |
| May 18 | Patchy rain possible | 27° /16° | 0.1 mm | 11 | |
| May 19 | Sunny | 28° /16° | 0.8 mm | 10 | |
| May 20 | Overcast | 24° /14° | 2.8 mm | 10 | |
| May 21 |  Heavy rain at times | 13° /10° | 12.8 mm | 2 | |
| May 22 | Moderate rain at times | 17° /10° | 11.3 mm | 5 | |
| May 23 | Moderate rain at times | 13° /9° | 14.6 mm | 3 | |
| May 24 | Patchy rain possible | 18° /10° | 8 mm | 7 | |
| May 25 | Cloudy | 20° /10° | 2.3 mm | 7 | |
| May 26 | Partly cloudy | 23° /14° | 0 mm | 11 | |
| May 27 |  Mist | 23° /15° | 4.4 mm | 6 | |
| May 28 | Moderate or heavy rain shower | 19° /12° | 40.3 mm | 7 | |
| May 29 | Fog | 23° /12° | 0.9 mm | 8 | |
| May 30 | Moderate or heavy rain shower | 21° /14° | 13.8 mm | 7 | |
| May 31 | Light rain shower | 24° /12° | 22.2 mm | 7 | |
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Important Notice
Our weather forecast for New Castle County in May 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 May - FAQ
What are the expected maximum and minimum temperatures in New Castle County during May?
Enjoy moderate daytime temperatures of up to 21° and cooler nights around 12°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in New Castle County during May?
Significant rainfall exceeding 201.2 mm is expected in New Castle County during May, occurring over more than 21 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in New Castle County during May?
The average wind speed in New Castle County during May is 18 km/h, suggesting breezy to windy conditions, depending on your activities.
May rainfall patterns in New Castle County
Explore the daily rainfall trends and prepare for New Castle Countys May weather 💧
Typically, New Castle County has 21 rainy days in May with a total of 201.2 mm of rainfall.
UV exposure in New Castle County during May
Stay informed about UV levels for safe outdoor activities throughout the month of May ☀️
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Where is New Castle County?Get accurate weather forecasts for New Castle County, located at latitude 39.746 and longitude -75.547. Stay updated with localized weather information tailored for New Castle County.
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