May weather forecast
Glenn Dale, MD

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Weather in May

May, the last month of the spring in Glenn Dale, is a pleasant month, with temperature in the range of an average low of 57°F (13.9°C) and an average high of 73.2°F (22.9°C).

Temperature

The arrival of May brings a change in Glenn Dale's weather, with average high-temperatures moving from April's enjoyable 63.7°F (17.6°C) to an agreeable 73.2°F (22.9°C). An average low-temperature of 57°F (13.9°C) is observed during May nights.

Humidity

The most humid month is May, with an average relative humidity of 77%.

Rainfall

In Glenn Dale, during May, the rain falls for 17.5 days and regularly aggregates up to 2.95" (75mm) of precipitation. Throughout the year, there are 156.7 rainfall days, and 31.81" (808mm) of precipitation is accumulated.

Snowfall

May through October are months without snowfall.

Daylight

In Glenn Dale, the average length of the day in May is 14h and 19min.
On the first day of May, sunrise is at 6:08 am and sunset at 8:00 pm. On the last day of the month, sunrise is at 5:43 am and sunset at 8:26 pm EDT.

Sunshine

In Glenn Dale, the average sunshine in May is 8.9h.

UV index

The months with the highest UV index are May through August, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.
Note: A maximum UV index of 6 in May translates into the following recommendations:
Adopt measures and apply sun safety strategies. Shielding from skin and eye damage is necessary. Avoid direct exposure to the Sun between 10 a.m. and 4 p.m., the peak period for UV radiation, noting that objects like parasols or canopies might not offer complete sun protection. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.

Frequently asked questions

What is the usual temperature for Glenn Dale in May?

May temperatures vary between a high-temperature of 73.2°F (22.9°C) and a low-temperature of 57°F (13.9°C).

What is the most humid month?

May is the most humid month, with an average relative humidity of 77%.

What is the average humidity in May?

The average relative humidity in May in Glenn Dale is 77%.

How many days does it rain in May?

In Glenn Dale, in May, it is raining for 17.5 days, with typically 2.95" (75mm) of accumulated precipitation.

When it does not snow in Glenn Dale?

May through October are months without snowfall.

Does it snow in May?

In May, it doesn't snow. April is the latest month when it typically snows.

What is the average length of the day in May?

In May, the average day length is 14h and 19min.

What time are sunrise and sunset in May in Glenn Dale?

In May, on the first day of the month, sunrise is at 6:08 am and sunset at 8:00 pm. On the last day of the month, sunrise is at 5:43 am and sunset at 8:26 pm EDT.

How many hours of sunshine does Glenn Dale have in May?

The average sunshine duration in May is 8.9h.

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?

The average daily maximum UV index in May is 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's 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
Glenn Dale, MD

Average temperature in May - Glenn Dale, MD
  • Average high temperature in May: 73.2°F

The warmest month (with the highest average high temperature) is July (86.4°F).
The month with the lowest average high temperature is January (39.7°F).

  • Average low temperature in May: 57°F

The month with the highest average low temperature is July (69.8°F).
The coldest month (with the lowest average low temperature) is January (28°F).

Average pressure in May
Glenn Dale, MD

Average pressure in May - Glenn Dale, MD
  • Average pressure in May: 30.01"Hg

The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

Average wind speed in May
Glenn Dale, MD

Average wind speed in May - Glenn Dale, MD
  • Average wind speed in May: 7mph

The windiest month (with the highest average wind speed) is March (8.8mph).
The calmest months (with the lowest average wind speed) are July and August (5.6mph).

Average humidity in May
Glenn Dale, MD

Average humidity in May - Glenn Dale, MD
  • Average humidity in May: 77%

The month with the highest relative humidity is May (77%).
The month with the lowest relative humidity is April (71%).

Average rainfall in May
Glenn Dale, MD

Average rainfall in May - Glenn Dale, MD
  • Average rainfall in May: 2.95"

The wettest month (with the highest rainfall) is August (3.62").
The driest month (with the least rainfall) is January (2.05").

Average rainfall days in May
Glenn Dale, MD

Average rainfall days in May - Glenn Dale, MD
  • Average rainfall days in May: 17.5 days

The month with the highest number of rainy days is May (17.5 days).
The month with the least rainy days is January (8.9 days).

Average snowfall in May
Glenn Dale, MD

Average snowfall in May - Glenn Dale, MD
  • Average snowfall in May: 0"

The month with the highest snowfall is January (2.36").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in May
Glenn Dale, MD

Average snowfall days in May - Glenn Dale, MD
  • Average snowfall days in May: 0 days

The month with the highest number of snowfall days is January (4.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average daylight in May /
Average sunshine in May
Glenn Dale, MD

Average daylight in May / Average sunshine in May - Glenn Dale, MD
  • Average daylight in May: 14h and 2min

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).

  • Average sunshine in May: 8h and 5min

The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is February (Average sunshine: 5h and 0min).

Average sunshine days in May
Glenn Dale, MD

Average sunshine days in May - Glenn Dale, MD
  • Average sunshine days in May: 11.5 days

The month with the most sunshine days is November (19 days).
The month with the least sunshine days is May (11.5 days).

Average UV index in May
Glenn Dale, MD

Average UV index in May - Glenn Dale, MD
  • 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
Glenn Dale, MD

Average cloud cover in May - Glenn Dale, MD
  • Average cloud cover in May: 43

The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 29).

Average visibility in May
Glenn Dale, MD

Average visibility in May - Glenn Dale, MD
  • 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).

Glenn Dale, Maryland, USA

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