May Weather in Dover, United States

Last updated: June 24, 2025

In Dover, United States, the average temperature in May is a pleasant 18°C (65°F). Visitors can expect a temperature range from a chilly 3°C (39°F) to a warm 33°C (92°F). During this time, the region receives an average precipitation of 127 mm (5.0 in) over approximately 12 days, paired with an average humidity of 78%. Ideal for experiencing the local climate, this month offers a blend of comfortable warmth and refreshing rain!

May Temperature in Dover

In May in Dover, the average temperature is 18°C (65°F), with maximums reaching up to 33°C (92°F) and minimums dropping as low as 3°C (39°F). It's advisable to pack both light clothing for the warm days and layers for the cooler nights during 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 18°C (65°F), with highs reaching up to 33°C (92°F) and lows dropping to around 3°C (39°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 127 mm (5.0 in) occurring over the course of 12 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 127 mm (5.0 inches) of precipitation spread over approximately 12 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 78%. With an average temperature of 18°C (65°F), this humidity feels like a warm, enveloping blanket, making travel quite muggy and potentially uncomfortable, as it can leave you feeling sticky and fatigued more quickly than usual.

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 78%, 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	3°C (38°F)	59 mm (2.3 inches)	84%	moderate
February Weather	5°C (41°F)	99 mm (3.9 inches)	83%	moderate
March Weather	8°C (46°F)	105 mm (4.1 inches)	83%	high
April Weather	13°C (56°F)	96 mm (3.8 inches)	81%	very high
May Weather	18°C (65°F)	127 mm (5.0 inches)	78%	very high
June Weather	24°C (75°F)	106 mm (4.2 inches)	79%	very high
July Weather	27°C (80°F)	144 mm (5.7 inches)	74%	very high
August Weather	25°C (78°F)	183 mm (7.2 inches)	72%	very high
September Weather	22°C (72°F)	96 mm (3.8 inches)	75%	very high
October Weather	17°C (63°F)	121 mm (4.8 inches)	81%	high
November Weather	9°C (49°F)	78 mm (3.1 inches)	85%	moderate
December Weather	5°C (42°F)	97 mm (3.8 inches)	84%	moderate