May weather forecast
Millsboro, DE

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Weather in May

May brings the onset of summer, and Millsboro basks in the warmth of increased temperatures. Rainfall levels in May peak to 2.13" (54mm), thus maintaining the city's lush green landscape. The daylight hours expand to 14.3 hours and sunshine hours also reach 9.3 hours per day. The wind speed reduces to an average of 9.3mph (15km/h), offering residents and visitors perfectly balmy conditions. With the hum of summer setting in, May serves as an invitation to outdoor enthusiasts for various activities.

Temperature

May indicates a change in the average high-temperature, moving up from a moderate 59.5°F (15.3°C) in April to a pleasant 68.5°F (20.3°C). Millsboro's nighttime temperature in May drops to an average of 57.4°F (14.1°C).

Humidity

With an average relative humidity of 81%, May is the most humid month.

Rainfall

In Millsboro, during May, the rain falls for 15.1 days and regularly aggregates up to 2.13" (54mm) of precipitation. Throughout the year, there are 146.8 rainfall days, and 25.2" (640mm) of precipitation is accumulated.

Snowfall

April through October are months without snowfall.

Daylight

The average length of the day in May is 14h and 17min.
On the first day of May, sunrise is at 6:02 am and sunset at 7:53 pm. On the last day of the month, sunrise is at 5:38 am and sunset at 8:19 pm EDT.

Sunshine

In Millsboro, the average sunshine in May is 9.3h.

UV index

May through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for the average person.
Note: In May, a regular UV index of 6 translates into these guidelines:
Shield from overexposure. Defense against sun-related harm is required. Limit direct sun exposure especially between 10 a.m. and 4 p.m., when UV radiation is at its peak. However, keep in mind that shade structures may not provide full sun protection. Stay sun-safe with clothing that is both closely woven and worn loosely.
Updated: Jul 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the temperatures in May?

In Millsboro, 68.5°F (20.3°C) is the average high-temperature and 57.4°F (14.1°C) is the average low-temperature during May.

What is the most humid month?

May is the most humid month, with an average relative humidity of 81%.

What is the average humidity in May?

The average relative humidity in May is 81%.

How much does it rain in May?

In Millsboro, in May, during 15.1 rainfall days, 2.13" (54mm) of precipitation is typically accumulated.

When it does not snow?

April through October are months without snowfall in Millsboro.

What is the average length of the day in May?

In Millsboro, the average day length in May is 14h and 17min.

When are sunrise and sunset in May?

On the first day of May, sunrise is at 6:02 am and sunset at 7:53 pm. On the last day of the month, sunrise is at 5:38 am and sunset at 8:19 pm EDT.

How many hours of sunshine does Millsboro have in May?

In May, the average sunshine duration is 9.3h.

What are the months with the highest UV index?

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

How high is the UV index in May in Millsboro?

In May, the average daily maximum UV index is 6. A UV Index reading of 6 to 7 represents a high health vulnerability from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Millsboro, DE

Average temperature in May - Millsboro, DE
  • Average high temperature in May: 68.5°F

The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (41.7°F).

  • Average low temperature in May: 57.4°F

The month with the highest average low temperature is July (71.6°F).
The coldest month (with the lowest average low temperature) is January (31.5°F).

Average pressure in May
Millsboro, DE

Average pressure in May - Millsboro, DE
  • Average pressure in May: 30.02"Hg

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

Average wind speed in May
Millsboro, DE

Average wind speed in May - Millsboro, DE
  • Average wind speed in May: 9.3mph

The windiest months (with the highest average wind speed) are January, February and March (11.1mph).
The calmest month (with the lowest average wind speed) is August (7.3mph).

Average humidity in May
Millsboro, DE

Average humidity in May - Millsboro, DE
  • Average humidity in May: 81%

The month with the highest relative humidity is May (81%).
The months with the lowest relative humidity are January and November (74%).

Average rainfall in May
Millsboro, DE

Average rainfall in May - Millsboro, DE
  • Average rainfall in May: 2.13"

The wettest months (with the highest rainfall) are July and August (2.95").
The driest month (with the least rainfall) is January (1.46").

Average rainfall days in May
Millsboro, DE

Average rainfall days in May - Millsboro, DE
  • Average rainfall days in May: 15.1 days

The month with the highest number of rainy days is July (16.7 days).
The month with the least rainy days is January (7.4 days).

Average snowfall in May
Millsboro, DE

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

The month with the highest snowfall is January (1.22").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in May
Millsboro, DE

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

The month with the highest number of snowfall days is January (3.1 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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

Average daylight in May / Average sunshine in May - Millsboro, DE
  • Average daylight in May: 14h and 2min

The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).

  • Average sunshine in May: 9h and 2min

The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is February (Average sunshine: 5h and 6min).

Average sunshine days in May
Millsboro, DE

Average sunshine days in May - Millsboro, DE
  • Average sunshine days in May: 13.2 days

The month with the most sunshine days is January (20.1 days).
The month with the least sunshine days is July (12.2 days).

Average UV index in May
Millsboro, DE

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

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

Average cloud cover in May
Millsboro, DE

Average cloud cover in May - Millsboro, DE
  • Average cloud cover in May: 39

The month with the most cloud cover is March (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 26).

Average visibility in May
Millsboro, DE

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

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

Millsboro, Delaware, USA

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