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
New Castle County in May brings notable rainfall, with an average of 16 rainy days and a total precipitation of 201.2 mm.
Is May a good time to visit New Castle County? check out the best time to travel to New Castle County page.
✨ Is May a good time to visit New Castle County? – Ask the AI Weatherman
Rain 🌧️
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15
Dry days
16
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
See the weather trend as well as the moving average line
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° /11° | 0.5 mm | 8 | |
| May 3 |  Light rain | 22° /11° | 4.7 mm | 9 | |
| May 4 |  Moderate or heavy rain shower | 21° /13° | 6.5 mm | 7 | |
| May 5 |  Patchy rain possible | 23° /15° | 2 mm | 6 | |
| May 6 | Moderate or heavy rain shower | 21° /15° | 9.9 mm | 4 | |
| May 7 | Light rain | 21° /12° | 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 | Light rain | 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 | Patchy rain possible | 25° /13° | 1.9 mm | 6 | |
| May 17 | Patchy rain possible | 28° /19° | 0.5 mm | 7 | |
| May 18 | Patchy rain possible | 27° /16° | 0.1 mm | 10.7 | |
| May 19 |  Sunny | 28° /16° | 0.8 mm | 10 | |
| May 20 | Light rain | 24° /15° | 2.8 mm | 10 | |
| May 21 |  Heavy rain at times | 13° /10° | 12.8 mm | 2 | |
| May 22 |  Moderate rain | 17° /11° | 11.3 mm | 5 | |
| May 23 | Moderate rain | 13° /9° | 14.6 mm | 3 | |
| May 24 | Light rain | 18° /10° | 8 mm | 7 | |
| May 25 | Patchy rain possible | 20° /10° | 2.3 mm | 7 | |
| May 26 | Partly cloudy | 23° /15° | 0 mm | 11 | |
| May 27 | Light rain | 23° /15° | 4.4 mm | 6 | |
| May 28 |  Heavy rain | 19° /12° | 40.3 mm | 7 | |
| May 29 |  Fog | 23° /12° | 0.9 mm | 8 | |
| May 30 | Moderate rain | 21° /15° | 13.8 mm | 7 | |
| May 31 | Moderate rain | 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 16 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 16 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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