May Weather in South New Castle, United States

Last updated: June 24, 2025

In May, the average temperature in South New Castle, United States hovers around 16°C (61°F), offering a comfortable climate. However, temperatures can vary widely, dropping to a chilly -2°C (29°F) at minimum and reaching a warm 31°C (88°F) at maximum. Prepare for the possibility of rain, as 141 mm (5.6 in) of precipitation is expected over 16 days. With an average humidity of 81%, it's important to stay hydrated and enjoy the refreshing atmosphere!

May Temperature in South New Castle

In May in South New Castle, the average temperature is 16°C (61°F). Maximum temperatures can reach 31°C (88°F), while minimums can drop as low as -2°C (29°F). Pack a variety of clothing to accommodate both warm days and chilly nights during your travels.

May Weather in South New Castle: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in South New Castle, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In South New Castle, May typically has an average temperature of 16°C (61°F), with highs reaching up to 31°C (88°F) and lows dropping to around -2°C (29°F).

Data source: Temperature data for South New Castle generated using information from the Copernicus Climate Change Service.

May Precipitation in South New Castle

In South New Castle in May, the precipitation amount is 141 mm (5.6 in) over the course of 16 days.

May Precipitation Trends in South New Castle

The chart displays monthly precipitation patterns in South New Castle, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In South New Castle, May typically receives around 141 mm (5.6 inches) of precipitation spread over approximately 16 days.

Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

May Humidity in South New Castle

In South New Castle in May, humidity is 81%. With an average temperature of 16°C (61°F), this humidity feels like a warm, heavy blanket wrapping around you as you explore the sights, making it essential to stay hydrated and take regular breaks in the shade.

May Average Humidity in South New Castle

This chart illustrates the average monthly humidity levels in South New Castle, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in South New Castle is approximately 81%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in South New Castle

In South New Castle in May, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in South New Castle.

Maximum UV Index Levels in South New Castle for May

The chart shows the monthly maximum UV Index (UVI) for South New Castle in May, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In May, the maximum UV index in South New Castle typically reaches 10, which falls under the very high exposure category.

Data source: South New Castle May UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How May Weather in South New Castle Compares to Other Months

Weather in South New Castle varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in South New Castle, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in South New Castle, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-2°C (29°F)	98 mm (3.9 inches)	88%	moderate
February Weather	0°C (33°F)	111 mm (4.4 inches)	88%	moderate
March Weather	4°C (40°F)	108 mm (4.3 inches)	87%	high
April Weather	10°C (50°F)	139 mm (5.5 inches)	87%	very high
May Weather	16°C (61°F)	141 mm (5.6 inches)	81%	very high
June Weather	20°C (69°F)	138 mm (5.4 inches)	83%	very high
July Weather	23°C (74°F)	141 mm (5.5 inches)	82%	very high
August Weather	22°C (72°F)	99 mm (3.9 inches)	76%	very high
September Weather	19°C (66°F)	115 mm (4.5 inches)	77%	very high
October Weather	13°C (56°F)	125 mm (4.9 inches)	82%	high
November Weather	5°C (41°F)	103 mm (4.0 inches)	89%	moderate
December Weather	1°C (35°F)	103 mm (4.0 inches)	86%	low