May Weather in Dover, United States

Last updated: June 24, 2025

In Dover, United States during May, the average temperature is a mild 13°C (56°F). Expect a range where the minimum can drop to a crisp -2°C (29°F) and the maximum can soar to a warm 32°C (90°F). You’ll encounter 105 mm (4.1 in) of precipitation spread over 14 days, accompanied by an average humidity of 76%.

May Temperature in Dover

In May in Dover, the average temperature is 13°C (56°F). The maximum can reach 32°C (90°F) and the minimum can be as low as -2°C (29°F). Be prepared for a range of temperatures and pack accordingly for your travels.

May Weather in Dover: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Dover, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Dover, May typically has an average temperature of 13°C (56°F), with highs reaching up to 32°C (90°F) and lows dropping to around -2°C (29°F).

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

May Precipitation in Dover

In Dover in May, the precipitation amount is 105 mm (4.1 in) over the course of 14 days.

May Precipitation Trends in Dover

The chart displays monthly precipitation patterns in Dover, 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 Dover, May typically receives around 105 mm (4.1 inches) of precipitation spread over approximately 14 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 Dover

In Dover in May humidity is 76%. With an average temperature of 13°C (56°F), this humidity feels like a damp blanket enveloping you, making travel a bit uncomfortable as you navigate through the heavy, moisture-laden air.

May Average Humidity in Dover

This chart illustrates the average monthly humidity levels in Dover, 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 Dover is approximately 76%, 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 Dover

In Dover 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 Dover.

Maximum UV Index Levels in Dover for May

The chart shows the monthly maximum UV Index (UVI) for Dover 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 Dover typically reaches 10, which falls under the very high exposure category.

Data source: Dover 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 Dover Compares to Other Months

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

This table compares monthly weather conditions in Dover, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-5°C (23°F)	81 mm (3.2 inches)	89%	moderate
February Weather	-4°C (25°F)	97 mm (3.8 inches)	88%	moderate
March Weather	0°C (32°F)	80 mm (3.1 inches)	86%	high
April Weather	6°C (44°F)	142 mm (5.6 inches)	84%	very high
May Weather	13°C (56°F)	105 mm (4.1 inches)	76%	very high
June Weather	18°C (65°F)	109 mm (4.3 inches)	72%	very high
July Weather	21°C (70°F)	164 mm (6.5 inches)	66%	very high
August Weather	20°C (68°F)	127 mm (5.0 inches)	64%	very high
September Weather	16°C (61°F)	105 mm (4.1 inches)	72%	high
October Weather	10°C (50°F)	166 mm (6.5 inches)	81%	high
November Weather	2°C (36°F)	106 mm (4.2 inches)	87%	moderate
December Weather	-3°C (27°F)	116 mm (4.6 inches)	84%	low