May Weather in Dover, United States

Last updated: June 24, 2025

In May, the average temperature in Dover, United States is a cool 11°C (53°F), with extremes ranging from a chilly 1°C (33°F) to a warm 30°C (86°F). Expect some rain, with 59 mm (2.3 in) of precipitation spread over 9 days. The air is quite humid, featuring an average humidity of 83%.

May Temperature in Dover

In May in Dover, the average temperature is 11°C (53°F). Maximums can reach 30°C (86°F), and minimums can be as low as 1°C (33°F). This makes it essential for travelers to pack layers to comfortably enjoy the varied weather conditions.

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 11°C (53°F), with highs reaching up to 30°C (86°F) and lows dropping to around 1°C (33°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 59 mm (2.3 in) over the course of 9 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 59 mm (2.3 inches) of precipitation spread over approximately 9 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 83%. With an average temperature of 11°C (53°F), this humidity feels like a heavy blanket wrapping around you, making every step feel sluggish and causing an inevitable sheen of sweat to form, which can dampen the joy of exploring your surroundings.

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 83%, 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 is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to 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 8, 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	0°C (32°F)	118 mm (4.6 inches)	95%	low
February Weather	-2°C (29°F)	115 mm (4.5 inches)	93%	moderate
March Weather	2°C (36°F)	89 mm (3.5 inches)	91%	high
April Weather	6°C (43°F)	83 mm (3.3 inches)	88%	high
May Weather	11°C (53°F)	59 mm (2.3 inches)	83%	very high
June Weather	16°C (60°F)	36 mm (1.4 inches)	80%	very high
July Weather	21°C (70°F)	8 mm (0.3 inches)	82%	very high
August Weather	22°C (71°F)	27 mm (1.1 inches)	71%	very high
September Weather	16°C (61°F)	58 mm (2.3 inches)	71%	high
October Weather	9°C (48°F)	106 mm (4.2 inches)	85%	moderate
November Weather	4°C (39°F)	132 mm (5.2 inches)	90%	moderate
December Weather	1°C (33°F)	145 mm (5.7 inches)	96%	low