May weather forecast
Dumfries, VA

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Weather in May

May, the last month of the spring in Dumfries, is a warm month, with an average temperature fluctuating between 75.6°F (24.2°C) and 56.3°F (13.5°C).

Temperature

Dumfries's weather shows a temperature rise with the arrival of May, moving from an enjoyable 66.2°F (19°C) in April to a warm 75.6°F (24.2°C). An average temperature of 56.3°F (13.5°C) is recorded during the nights in May.

Humidity

The average relative humidity in May is 77%.

Rainfall

In Dumfries, in May, during 16.9 rainfall days, 3.15" (80mm) of precipitation is typically accumulated. Throughout the year, there are 155.6 rainfall days, and 31.61" (803mm) of precipitation is accumulated.

Snowfall

May through October are months without snowfall.

Daylight

In Dumfries, the average length of the day in May is 14h and 17min.
On the first day of May, sunrise is at 6:11 am and sunset at 8:01 pm. On the last day of the month, sunrise is at 5:46 am and sunset at 8:27 pm EDT.

Sunshine

In May, the average sunshine is 8.9h.

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 average individuals.
Note: In May, a daily maximum UV index of 6 leads to the following instructions:
Shield from overexposure. Defense against sun-related harm is required. Be aware that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. and try to reduce direct sun exposure during this period as much as possible. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.

Frequently asked questions

What are May temperatures?

An average high-temperature, in May, in Dumfries, is 75.6°F (24.2°C) and the average low-temperature is 56.3°F (13.5°C).

What is the average humidity in May in Dumfries?

In May, the average relative humidity is 77%.

How much does it rain in May?

In May, the rain falls for 16.9 days. Throughout May, 3.15" (80mm) of precipitation is accumulated.

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.

What is the average length of the day in May?

The average day length in May is 14h and 17min.

What time are sunrise and sunset in May?

In May, on the first day of the month, sunrise is at 6:11 am and sunset at 8:01 pm. On the last day of the month, sunrise is at 5:46 am and sunset at 8:27 pm EDT.

How many hours of sunshine does Dumfries have in May?

In Dumfries, the average sunshine duration in May is 8.9h.

What are the months with 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 value of 6 to 7 symbolizes a high health risk 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
Dumfries, VA

Average temperature in May - Dumfries, VA
  • Average high temperature in May: 75.6°F

The warmest month (with the highest average high temperature) is July (88.7°F).
The month with the lowest average high temperature is January (41.5°F).

  • Average low temperature in May: 56.3°F

The month with the highest average low temperature is July (67.8°F).
The coldest month (with the lowest average low temperature) is January (27.5°F).

Average pressure in May
Dumfries, VA

Average pressure in May - Dumfries, VA
  • 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
Dumfries, VA

Average wind speed in May - Dumfries, VA
  • Average wind speed in May: 6mph

The windiest months (with the highest average wind speed) are March and April (7.1mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).

Average humidity in May
Dumfries, VA

Average humidity in May - Dumfries, VA
  • Average humidity in May: 77%

The months with the highest relative humidity are October and December (78%).
The months with the lowest relative humidity are January, April and July (73%).

Average rainfall in May
Dumfries, VA

Average rainfall in May - Dumfries, VA
  • Average rainfall in May: 3.15"

The wettest month (with the highest rainfall) is August (3.66").
The driest month (with the least rainfall) is January (1.97").

Average rainfall days in May
Dumfries, VA

Average rainfall days in May - Dumfries, VA
  • Average rainfall days in May: 16.9 days

The month with the highest number of rainy days is May (16.9 days).
The month with the least rainy days is November (8.7 days).

Average snowfall in May
Dumfries, VA

Average snowfall in May - Dumfries, VA
  • Average snowfall in May: 0"

The month with the highest snowfall is January (2.52").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in May
Dumfries, VA

Average snowfall days in May - Dumfries, VA
  • Average snowfall days in May: 0 days

The month with the highest number of snowfall days is January (4.9 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
Dumfries, VA

Average daylight in May / Average sunshine in May - Dumfries, VA
  • 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: 8h and 5min

The month with the most sunshine is July (Average sunshine: 10h and 30min).
The months with the least sunshine are February and December (Average sunshine: 5h and 6min).

Average sunshine days in May
Dumfries, VA

Average sunshine days in May - Dumfries, VA
  • Average sunshine days in May: 11.5 days

The month with the most sunshine days is November (20 days).
The month with the least sunshine days is May (11.5 days).

Average UV index in May
Dumfries, VA

Average UV index in May - Dumfries, VA
  • 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
Dumfries, VA

Average cloud cover in May - Dumfries, VA
  • Average cloud cover in May: 45

The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 32).

Average visibility in May
Dumfries, VA

Average visibility in May - Dumfries, VA
  • 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).

Dumfries, Virginia, USA

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