May weather forecast
Runnymeade Summit, MD

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Weather in May

May, the last month of the spring in Runnymeade Summit, is a pleasant month, with temperature in the range of an average low of 52.9°F (11.6°C) and an average high of 71.2°F (21.8°C).

Temperature

Runnymeade Summit's weather in May shows a rise in the average high-temperature, moving up from April's comfortable 61.5°F (16.4°C) to a pleasant 71.2°F (21.8°C). During May, the temperature is averaged to a low of 52.9°F (11.6°C) at night.

Humidity

With an average relative humidity of 80%, May is the most humid month.

Rainfall

In May, the rain falls for 18 days. Throughout May, 2.95" (75mm) of precipitation is accumulated. Throughout the year, there are 157.5 rainfall days, and 27.52" (699mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, October through December. May is the last month it regularly snows. During 0.1 snowfall days, in May, Runnymeade Summit aggregates 0.04" (1mm) of snow. In Runnymeade Summit, during the entire year, snow falls for 22.3 days and aggregates up to 9.76" (248mm) of snow.

Daylight

In Runnymeade Summit, the average length of the day in May is 14h and 23min.
On the first day of May, sunrise is at 6:08 am and sunset at 8:02 pm. On the last day of the month, sunrise is at 5:42 am and sunset at 8:29 pm EDT.

Sunshine

In Runnymeade Summit, the average sunshine in May is 8.5h.

UV index

May through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for the average person.
Note: In May, the maximum UV index of 6 transforms into these recommendations:
Undertake protective measures and comply with sun safety rules. Shielding against skin and eye damage is essential. 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. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense. Heads up! The UV radiation from the Sun can almost be doubled by snow reflection.
Updated: Aug 15, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the average May temperature?

In Runnymeade Summit, 71.2°F (21.8°C) is the average high-temperature and 52.9°F (11.6°C) is the average low-temperature during May.

What is the most humid month in Runnymeade Summit?

May is the most humid month, with an average relative humidity of 80%.

What is the average humidity in May?

In Runnymeade Summit, the average relative humidity in May is 80%.

How many days does it rain in May?

In Runnymeade Summit, in May, it is raining for 18 days, with typically 2.95" (75mm) of accumulated precipitation.

What is the last month it snows?

May is the last month it regularly snows. During 0.1 snowfall days, in May, Runnymeade Summit aggregates 0.04" (1mm) of snow.

How many hours of daylight does Runnymeade Summit have in May?

In Runnymeade Summit, the average day length in May is 14h and 23min.

When is the sunrise / sunset in May?

In May, on the first day of the month, sunrise is at 6:08 am and sunset at 8:02 pm. On the last day of the month, sunrise is at 5:42 am and sunset at 8:29 pm EDT.

How many hours of sunshine does Runnymeade Summit have in May?

In Runnymeade Summit, the average sunshine duration in May is 8.5h.

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.

How high is the UV index in May?

In May, the average daily maximum UV index is 6. A UV Index estimate 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
Runnymeade Summit, MD

Average temperature in May - Runnymeade Summit, MD
  • Average high temperature in May: 71.2°F

The warmest month (with the highest average high temperature) is July (84°F).
The month with the lowest average high temperature is January (36.7°F).

  • Average low temperature in May: 52.9°F

The month with the highest average low temperature is July (64.6°F).
The coldest month (with the lowest average low temperature) is January (23.5°F).

Average pressure in May
Runnymeade Summit, MD

Average pressure in May - Runnymeade Summit, 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
Runnymeade Summit, MD

Average wind speed in May - Runnymeade Summit, MD
  • Average wind speed in May: 6.5mph

The windiest month (with the highest average wind speed) is March (8.4mph).
The calmest months (with the lowest average wind speed) are July and August (5mph).

Average humidity in May
Runnymeade Summit, MD

Average humidity in May - Runnymeade Summit, MD
  • Average humidity in May: 80%

The month with the highest relative humidity is May (80%).
The month with the lowest relative humidity is April (75%).

Average rainfall in May
Runnymeade Summit, MD

Average rainfall in May - Runnymeade Summit, MD
  • Average rainfall in May: 2.95"

The wettest month (with the highest rainfall) is August (3.23").
The driest month (with the least rainfall) is February (1.61").

Average rainfall days in May
Runnymeade Summit, MD

Average rainfall days in May - Runnymeade Summit, MD
  • Average rainfall days in May: 18 days

The month with the highest number of rainy days is May (18 days).
The month with the least rainy days is January (7.6 days).

Average snowfall in May
Runnymeade Summit, MD

Average snowfall in May - Runnymeade Summit, MD
  • Average snowfall in May: 0.04"

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

Average snowfall days in May
Runnymeade Summit, MD

Average snowfall days in May - Runnymeade Summit, MD
  • Average snowfall days in May: 0.1 days

The month with the highest number of snowfall days is January (6.7 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in May /
Average sunshine in May
Runnymeade Summit, MD

Average daylight in May / Average sunshine in May - Runnymeade Summit, 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 24min).

  • Average sunshine in May: 8h and 3min

The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).

Average sunshine days in May
Runnymeade Summit, MD

Average sunshine days in May - Runnymeade Summit, MD
  • Average sunshine days in May: 10.8 days

The month with the most sunshine days is November (19.2 days).
The month with the least sunshine days is May (10.8 days).

Average UV index in May
Runnymeade Summit, MD

Average UV index in May - Runnymeade Summit, 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, February, November and December (UV index 2).

Average cloud cover in May
Runnymeade Summit, MD

Average cloud cover in May - Runnymeade Summit, MD
  • Average cloud cover in May: 46

The months with the most cloud cover are February and March (Cloud cover 48).
The month with the least cloud cover is July (Cloud cover 31).

Average visibility in May
Runnymeade Summit, MD

Average visibility in May - Runnymeade Summit, MD
  • Average visibility in May: 5mi

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

Runnymeade Summit, Maryland, USA

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