May weather forecast
Green Wood Knolls, MD

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Weather in May

The last month of the spring, May, is a warm month in Green Wood Knolls, Maryland, with an average temperature varying between 55.8°F (13.2°C) and 73.9°F (23.3°C).

Temperature

With the transition into May, Green Wood Knolls experiences an increase in average high-temperatures, moving up from a comfortable 64.2°F (17.9°C) in April to a moderately hot 73.9°F (23.3°C). Nighttime temperatures consistently average a moderate 55.8°F (13.2°C) during May.

Humidity

The months with the highest humidity are May, October and December, with an average relative humidity of 76%.

Rainfall

In Green Wood Knolls, during May, the rain falls for 17.8 days and regularly aggregates up to 3.23" (82mm) of precipitation. Throughout the year, there are 160.9 rainfall days, and 32.99" (838mm) of precipitation is accumulated.

Snowfall

May through October are months without snowfall.

Daylight

The average length of the day in May is 14h and 20min.
On the first day of May, sunrise is at 6:09 am and sunset at 8:01 pm. On the last day of the month, sunrise is at 5:44 am and sunset at 8:27 pm EDT.

Sunshine

The average sunshine in May is 8.8h.

UV index

The months with the highest UV index are May through August, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for average individuals.
Note: The daily high UV index of 6 in May translates into this advice:
Resist extreme sun exposure. Guarding against solar damage is essential. Remember that UV radiation from the Sun is strongest between 10 a.m. and 4 p.m. Make an effort to limit direct sun exposure during this time. A hat with a broad brim is indispensable, filtering out up to half of UV rays.

Frequently asked questions

What is the average May temperature?

An average high-temperature, in May, in Green Wood Knolls, is 73.9°F (23.3°C) and the average low-temperature is 55.8°F (13.2°C).

What are the most humid months?

The months with the highest humidity in Green Wood Knolls, Maryland, are May, October and December, with an average relative humidity of 76%.

What is the average humidity in May?

The average relative humidity in May is 76%.

How many days does it rain in May?

In Green Wood Knolls, Maryland, in May, it is raining for 17.8 days, with typically 3.23" (82mm) of accumulated precipitation.

When it does not snow?

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.

How many hours of daylight does Green Wood Knolls have in May?

In May, the average day length is 14h and 20min.

When are sunrise and sunset in May in Green Wood Knolls?

On the first day of May, sunrise is at 6:09 am and sunset at 8:01 pm. On the last day of the month, sunrise is at 5:44 am and sunset at 8:27 pm EDT.

How many hours of sunshine does Green Wood Knolls have in May?

The average sunshine duration in May is 8.8h.

When is the highest UV index?

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

What is the UV index reading in May?

In May, the average daily maximum UV index is 6. A UV Index value of 6 to 7 symbolizes a high health risk from unsafe exposure to Sun's UV rays.
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
Green Wood Knolls, MD

Average temperature in May - Green Wood Knolls, MD
  • Average high temperature in May: 73.9°F

The warmest month (with the highest average high temperature) is July (87.3°F).
The month with the lowest average high temperature is January (39°F).

  • Average low temperature in May: 55.8°F

The month with the highest average low temperature is July (68.7°F).
The coldest month (with the lowest average low temperature) is January (26.2°F).

Average pressure in May
Green Wood Knolls, MD

Average pressure in May - Green Wood Knolls, 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 (29.95"Hg).

Average wind speed in May
Green Wood Knolls, MD

Average wind speed in May - Green Wood Knolls, MD
  • Average wind speed in May: 6.5mph

The windiest month (with the highest average wind speed) is March (8.1mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).

Average humidity in May
Green Wood Knolls, MD

Average humidity in May - Green Wood Knolls, MD
  • Average humidity in May: 76%

The months with the highest relative humidity are May, October and December (76%).
The month with the lowest relative humidity is July (70%).

Average rainfall in May
Green Wood Knolls, MD

Average rainfall in May - Green Wood Knolls, MD
  • Average rainfall in May: 3.23"

The wettest month (with the highest rainfall) is August (4.13").
The driest month (with the least rainfall) is January (2.17").

Average rainfall days in May
Green Wood Knolls, MD

Average rainfall days in May - Green Wood Knolls, MD
  • Average rainfall days in May: 17.8 days

The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is November (8.8 days).

Average snowfall in May
Green Wood Knolls, MD

Average snowfall in May - Green Wood Knolls, MD
  • Average snowfall in May: 0"

The months with the highest snowfall are January and March (3.03").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in May
Green Wood Knolls, MD

Average snowfall days in May - Green Wood Knolls, MD
  • Average snowfall days in May: 0 days

The months with the highest number of snowfall days are January and February (5.1 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
Green Wood Knolls, MD

Average daylight in May / Average sunshine in May - Green Wood Knolls, 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 48min).
The month with the least sunshine is February (Average sunshine: 5h and 0min).

Average sunshine days in May
Green Wood Knolls, MD

Average sunshine days in May - Green Wood Knolls, MD
  • Average sunshine days in May: 11 days

The month with the most sunshine days is November (19.4 days).
The months with the least sunshine days are May and July (11 days).

Average UV index in May
Green Wood Knolls, MD

Average UV index in May - Green Wood Knolls, 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, November and December (UV index 2).

Average cloud cover in May
Green Wood Knolls, MD

Average cloud cover in May - Green Wood Knolls, MD
  • Average cloud cover in May: 44

The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 31).

Average visibility in May
Green Wood Knolls, MD

Average visibility in May - Green Wood Knolls, MD
  • Average visibility in May: 5mi

The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).

Green Wood Knolls, Maryland, USA

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