May weather forecast
Jarrettsville, MD

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Weather in May

The last month of the spring, May, is an agreeable month in Jarrettsville, Maryland, with an average temperature fluctuating between 54.5°F (12.5°C) and 71.4°F (21.9°C).

Temperature

May's arrival coincides with a rise in the average high-temperature, moving from April's refreshing 61.9°F (16.6°C) to a pleasant 71.4°F (21.9°C). In the month of May, the average temperature dips to a fresh 54.5°F (12.5°C) during the night.

Humidity

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

Rainfall

In May, in Jarrettsville, the rain falls for 17.1 days. Throughout May, 2.99" (76mm) of precipitation is accumulated. Throughout the year, there are 155.7 rainfall days, and 32.64" (829mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, November and December. May is the last month it regularly snows. During 0.2 snowfall days, in May, Jarrettsville aggregates 0.2" (5mm) of snow. Throughout the year, there are 19.9 snowfall days, and 9.72" (247mm) of snow is accumulated.

Daylight

The average length of the day in May is 14h and 22min.
On the first day of the month, sunrise is at 6:05 am and sunset at 8:00 pm. On the last day of May, in Jarrettsville, Maryland, sunrise is at 5:40 am and sunset at 8:27 pm EDT.

Sunshine

In May, the average sunshine is 8.4h.

UV index

The months with the highest UV index are May through August, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for the average person.
Note: In May, a regular UV index of 6 translates into these guidelines:
Escape overexposure. People with light skin may incur burns in fewer than 20 minutes. Avoid direct Sun exposure and stay in the shade between 10 a.m. and 4 p.m., a time when UV radiation is most intense, noting that not all shade structures offer full protection. 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. Be alert to the fact! The reflection from snow can nearly double the UV radiation of the Sun.
Updated: Jun 22, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the temperature in May?

The high-temperature, in May, in Jarrettsville, records 71.4°F (21.9°C), while the low-temperature is 54.5°F (12.5°C).

What is the most humid month?

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

What is the average humidity in May?

The average relative humidity in May is 80%.

How much does it rain in May?

In Jarrettsville, in May, during 17.1 rainfall days, 2.99" (76mm) of precipitation is typically accumulated.

What is the last month it snows?

May is the last month it regularly snows. During 0.2 snowfall days, in May, Jarrettsville aggregates 0.2" (5mm) of snow.

How many hours of daylight does Jarrettsville have in May?

In May, the average day length is 14h and 22min.

When is the sunrise / sunset in May?

On the first day of May, sunrise is at 6:05 am and sunset at 8:00 pm. On the last day of the month, sunrise is at 5:40 am and sunset at 8:27 pm EDT.

How long on average sun shines in May?

In May, the average sunshine duration is 8.4h.

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.

What is the UV index reading in May?

In Jarrettsville, the average daily maximum UV index in May is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from 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
Jarrettsville, MD

Average temperature in May - Jarrettsville, MD
  • Average high temperature in May: 71.4°F

The warmest month (with the highest average high temperature) is July (84.6°F).
The month with the lowest average high temperature is January (37.6°F).

  • Average low temperature in May: 54.5°F

The month with the highest average low temperature is July (67.6°F).
The coldest month (with the lowest average low temperature) is January (25.3°F).

Average pressure in May
Jarrettsville, MD

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

The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

Average wind speed in May
Jarrettsville, MD

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

The windiest month (with the highest average wind speed) is March (9.1mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).

Average humidity in May
Jarrettsville, MD

Average humidity in May - Jarrettsville, 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 (74%).

Average rainfall in May
Jarrettsville, MD

Average rainfall in May - Jarrettsville, MD
  • Average rainfall in May: 2.99"

The wettest month (with the highest rainfall) is August (4.09").
The driest month (with the least rainfall) is February (2.09").

Average rainfall days in May
Jarrettsville, MD

Average rainfall days in May - Jarrettsville, MD
  • Average rainfall days in May: 17.1 days

The month with the highest number of rainy days is May (17.1 days).
The month with the least rainy days is January (8.3 days).

Average snowfall in May
Jarrettsville, MD

Average snowfall in May - Jarrettsville, MD
  • Average snowfall in May: 0.2"

The month with the highest snowfall is March (2.87").
The months with the least snowfall are June, July, August, September and October (0").

Average snowfall days in May
Jarrettsville, MD

Average snowfall days in May - Jarrettsville, MD
  • Average snowfall days in May: 0.2 days

The months with the highest number of snowfall days are January and February (5.6 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in May /
Average sunshine in May
Jarrettsville, MD

Average daylight in May / Average sunshine in May - Jarrettsville, 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 2min

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 48min).

Average sunshine days in May
Jarrettsville, MD

Average sunshine days in May - Jarrettsville, MD
  • Average sunshine days in May: 11.7 days

The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is May (11.7 days).

Average UV index in May
Jarrettsville, MD

Average UV index in May - Jarrettsville, 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
Jarrettsville, MD

Average cloud cover in May - Jarrettsville, MD
  • Average cloud cover in May: 47

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

Average visibility in May
Jarrettsville, MD

Average visibility in May - Jarrettsville, 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).

Jarrettsville, Maryland, USA

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