May weather forecast and climate
Dover, DE

The public Archives building in Dover, Delaware, between two large trees
The public Archives building in Dover, Delaware, between two large trees

Weather in May

The last month of the spring, May, is an agreeable month in Dover, Delaware, with average temperature fluctuating between 56.7°F (13.7°C) and 70.7°F (21.5°C).

Temperature

In May, the average high-temperature increases, from a comfortable 61°F (16.1°C) in April, to a pleasant 70.7°F (21.5°C). In May, the average low-temperature is 56.7°F (13.7°C).

Humidity

With an average relative humidity of 79%, May is the most humid month.

Rainfall

In Dover, Delaware, in May, during 15.6 rainfall days, 2.4" (61mm) of precipitation is typically accumulated. In Dover, during the entire year, the rain falls for 152.3 days and collects up to 26.3" (668mm) of precipitation.

Snowfall

April through November are months without snowfall.

Daylight

In Dover, the average length of the day in May is 14.3h.

Sunshine

In Dover, the average sunshine is 8.9h.

UV index

May through August, with an average maximum UV index of 6, are months with the highest UV index in Dover. A UV Index value of 6 to 7 symbolizes a high threat to health from unsafe exposure to the UV radiation for average individuals.
Note: The average daily UV index of 6 in May transform into the following instructions:
Take precautions and utilize sun safety practices. Protection against the skin and eye damage is required. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the temperature in May in Dover?

In Dover, Delaware, in May, the average high-temperature is 70.7°F (21.5°C), and the average low-temperature is 56.7°F (13.7°C).

What is the most humid month in Dover?

The most humid month in Dover, Delaware, is May, with an average relative humidity of 79%.

What is the average humidity in May in Dover?

In Dover, the average relative humidity in May is 79%.

How much does it rain in Dover in May?

In Dover, in May, during 15.6 rainfall days, 2.4" (61mm) of precipitation is typically accumulated.

When it does not snow in Dover?

April through November are months without snowfall.

How many hours of daylight does Dover have in May?

The average length of the day in May in Dover, Delaware, is 14.3h.

How many hours of sunshine does Dover have in May?

In May, the average sunshine is 8.9h.

What is the month with the highest UV index in Dover?

May through August, with an average maximum UV index of 6, are months with the highest UV index in Dover.

What is the UV index intensity in May in Dover?

In May, the average daily maximum UV index in Dover is 6. A UV Index reading of 6 to 7 represents a high health vulnerability from the exposure to the Sun's UV rays.

Average temperature in May
Dover, DE

Average temperature in May - Dover, DE
  • Average high temperature in May: 70.7°F

The warmest month (with the highest average high temperature) is July (84.2°F).
The month with the lowest average high temperature is January (39.7°F).

  • Average low temperature in May: 56.7°F

The month with the highest average low temperature is July (70°F).
The coldest month (with the lowest average low temperature) is January (28.8°F).

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Average pressure in May
Dover, DE

Average pressure in May - Dover, DE
  • Average pressure in May: 30.02"

The month with the highest atmospheric pressure is November (30.12").
The month with the lowest atmospheric pressure is June (29.94").

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Average wind speed in May
Dover, DE

Average wind speed in May - Dover, DE
  • Average wind speed in May: 8.1mph

The windiest month (with the highest average wind speed) is February (10.1mph).
The calmest month (with the lowest average wind speed) is August (6.4mph).

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Average humidity in May
Dover, DE

Average humidity in May - Dover, DE
  • Average humidity in May: 79%

The month with the highest relative humidity is May (79%).
Months with the lowest relative humidity are January, March, April and November (74%).

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Average rainfall in May
Dover, DE

Average rainfall in May - Dover, DE
  • Average rainfall in May: 2.4"

The wettest month (with the highest rainfall) is August (3.15").
The driest month (with the least rainfall) is January (1.46").

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Average rainfall days in May
Dover, DE

Average rainfall days in May - Dover, DE
  • Average rainfall days in May: 15.6 days

The month with the highest number of rainy days is July (17.6 days).
The month with the least rainy days is November (8.1 days).

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Average snowfall in May
Dover, DE

Average snowfall in May - Dover, DE
  • Average snowfall in May: 0"

The month with the highest snowfall is January (1.65").
Months with the least snowfall are April, May, June, July, August, September, October and November (0").

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Average snowfall days in May
Dover, DE

Average snowfall days in May - Dover, DE
  • Average snowfall days in May: 0 days

The month with the highest number of snowfall days is January (3.5 days).
Months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).

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Average daylight in May /
Average sunshine in May
Dover, DE

Average daylight in May / Average sunshine in May - Dover, DE
  • Average daylight in May: 14.3h

The month with the longest days is June (Average daylight: 14.9h).
The month with the shortest days is December (Average daylight: 9.5h).

  • Average sunshine in May: 8.9h

The month with the most sunshine is July (Average sunshine: 10.8h).
The month with the least sunshine is February (Average sunshine: 5h).

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Average sunshine days in May
Dover, DE

Average sunshine days in May - Dover, DE
  • Average sunshine days in May: 12.5 days

The month with the most sunshine days is November (20.5 days).
The month with the least sunshine days is July (10.8 days).

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Average UV index in May
Dover, DE

Average UV index in May - Dover, DE
  • Average UV index in May: 6

Months with the highest UV index are May, June, July and August (UV index 6).
Months with the lowest UV index are January and December (UV index 2).

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Average cloud cover in May
Dover, DE

Average cloud cover in May - Dover, DE
  • Average cloud cover in May: 42

The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 28).

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Average visibility in May
Dover, DE

Average visibility in May - Dover, DE
  • Average visibility in May: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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