New Castle County
May
Weather in New Castle County for May 2025
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 19.7 °F. As the month progressed, temperatures tended to significantly warm up, reaching an average of 24 °F by the end of May.
New Castle County experiences an exceptionally high level of rainfall in May, with more than 20 rainy days on average.
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10
Dry days
21
Rainy days
0
Snow days
21°/13°
Temperatures
15 km/h
Avg max wind
80 %
Avg humidity
New Castle County in May average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  22° | 2  24° | 3  21° | 4  13° | |||
| 5 16° | 6  21° | 7 21° | 8 28° | 9 21° | 10 12° | 11 15° |
| 12 14° | 13 20° | 14 19° | 15 15° | 16 16° | 17 21° | 18 16° |
| 19 22° | 20 24° | 21 26° | 22 28° | 23 25° | 24 26° | 25 27° |
| 26 28° | 27  24° | 28 25° | 29 22° | 30 21° | 31  21° |
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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 day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| May 1 | Light rain shower | 22° /13° | 5.4 mm | 5 | |
| May 2 | Overcast | 24° /14° | 0 mm | 5 | |
| May 3 | Sunny | 21° /11° | 0 mm | 6 | |
| May 4 | Light drizzle | 13° /10° | 2.3 mm | 3 | |
| May 5 | Light rain | 16° /9° | 15.1 mm | 4 | |
| May 6 | Fog | 21° /15° | 0.8 mm | 5 | |
| May 7 | Light rain shower | 21° /16° | 4.6 mm | 5 | |
| May 8 | Light rain shower | 28° /16° | 1.4 mm | 6 | |
| May 9 | Light rain shower | 21° /14° | 8.5 mm | 5 | |
| May 10 | Light rain shower | 12° /8° | 15.6 mm | 3 | |
| May 11 | Patchy rain possible | 15° /7° | 2.5 mm | 4 | |
| May 12 | Light rain shower | 14° /7° | 3.7 mm | 3 | |
| May 13 | Mist | 20° /6° | 0 mm | 5 | |
| May 14 | Light rain | 19° /12° | 6.1 mm | 4 | |
| May 15 | Light rain | 15° /14° | 14 mm | 4 | |
| May 16 | Light drizzle | 16° /14° | 0.5 mm | 4 | |
| May 17 | Patchy rain possible | 21° /13° | 0 mm | 5 | |
| May 18 | Light rain | 16° /13° | 5.9 mm | 4 | |
| May 19 | Patchy rain possible | 22° /12° | 0.1 mm | 5 | |
| May 20 | Mist | 24° /12° | 0 mm | 5 | |
| May 21 | Sunny | 26° /12° | 0 mm | 7 | |
| May 22 | Sunny | 28° /14° | 4.5 mm | 7 | |
| May 23 | Light rain shower | 25° /18° | 8.2 mm | 6 | |
| May 24 | Mist | 26° /16° | 0 mm | 6 | |
| May 25 | Light rain shower | 27° /17° | 3.7 mm | 6 | |
| May 26 | Light rain shower | 28° /18° | 11.1 mm | 6 | |
| May 27 | Patchy light rain with thunder | 24° /17° | 15.9 mm | 5 | |
| May 28 | Patchy rain possible | 25° /16° | 0 mm | 6 | |
| May 29 | Patchy light rain with thunder | 22° /13° | 3.6 mm | 5 | |
| May 30 | Light drizzle | 21° /13° | 0.6 mm | 5 | |
| May 31 | Partly cloudy | 21° /9° | 0 mm | 6 | |
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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.
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 13°. 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 134.1 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 15 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 💧
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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