May Weather in Dover, United States

Last updated: June 24, 2025

In Dover, United States, the average temperature in May hovers around 21°C (70°F), making it a pleasant time to visit. However, be prepared for a range, as temperatures can drop to a cool 5°C (41°F) or climb to a warm 33°C (93°F). Expect around 127 mm (5.0 in) of precipitation over 14 days, with an average humidity level of 82%.

May Temperature in Dover

In May in Dover, the average temperature is 21°C (70°F), with maximums reaching up to 33°C (93°F) and minimums dropping as low as 5°C (41°F). This variation in temperature makes it a great time to experience the diverse outdoor activities and attractions that Dover has to offer, so be sure to pack accordingly for both warm and cool moments.

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 21°C (70°F), with highs reaching up to 33°C (93°F) and lows dropping to around 5°C (41°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 total precipitation amount is 127 mm (5.0 in), occurring 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 127 mm (5.0 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 82%. With an average temperature of 21°C (70°F), this humidity feels like a warm, sticky embrace that can quickly lead to discomfort for travelers, making outdoor activities less enjoyable and requiring frequent breaks for hydration.

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 82%, 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	4°C (40°F)	100 mm (3.9 inches)	86%	moderate
February Weather	6°C (43°F)	166 mm (6.5 inches)	84%	high
March Weather	11°C (52°F)	152 mm (6.0 inches)	84%	high
April Weather	15°C (59°F)	154 mm (6.0 inches)	80%	very high
May Weather	21°C (70°F)	127 mm (5.0 inches)	82%	very high
June Weather	25°C (77°F)	107 mm (4.2 inches)	83%	extreme
July Weather	27°C (81°F)	105 mm (4.1 inches)	79%	extreme
August Weather	26°C (79°F)	111 mm (4.4 inches)	76%	very high
September Weather	23°C (74°F)	109 mm (4.3 inches)	75%	very high
October Weather	17°C (63°F)	121 mm (4.8 inches)	74%	high
November Weather	9°C (48°F)	94 mm (3.7 inches)	85%	moderate
December Weather	7°C (45°F)	126 mm (4.9 inches)	88%	moderate