Contents
- Weather in May
- Frequently asked questions
- Average temperature in May
- Average pressure in May
- Average wind speed in May
- Average humidity in May
- Average rainfall in May
- Average rainfall days in May
- Average snowfall in May
- Average snowfall days in May
- Average daylight in May
- Average sunshine in May
- Average sunshine days in May
- Average UV index in May
- Average cloud cover in May
- Average visibility in May
Weather in May
Temperature
The arrival of May brings a change in Ashburn's weather, with average high-temperatures moving from April's comfortable 64.9°F (18.3°C) to a warm 75°F (23.9°C). Ashburn throughout May, experiences an average nighttime temperature of 55°F (12.8°C).Humidity
In May, the average relative humidity is 76%.Rainfall
In May, the rain falls for 17.5 days. Throughout May, 3.11" (79mm) of precipitation is accumulated. In Ashburn, during the entire year, the rain falls for 158.1 days and collects up to 31.46" (799mm) of precipitation.Snowfall
May through October are months without snowfall.Daylight
In Ashburn, the average length of the day in May is 14h and 20min.On the first day of May in Ashburn, sunrise is at 6:10 am and sunset at 8:03 pm. On the last day of the month, sunrise is at 5:46 am and sunset at 8:29 pm EDT.
Sunshine
In Ashburn, the average sunshine in May is 8.7h.UV index
May through August, with an average maximum UV index of 6, are months with the highest UV index in Ashburn, Virginia. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for the average person.Note: The daily high UV index of 6 during May translates into the following recommendations:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. From 10 a.m. to 4 p.m., when UV radiation is at its strongest, limit direct exposure to the Sun and note that shade structures may not provide full sun protection. Always opt for UVA and UVB-resistant sunglasses on radiant days.
Frequently asked questions
What is the usual temperature for Ashburn in May?
What is the average humidity in May in Ashburn?
How many days does it rain in May in Ashburn?
When it does not snow in Ashburn?
Does it snow in Ashburn in May?
What is the average length of the day in May in Ashburn?
When are sunrise and sunset in May in Ashburn?
How long on average sun shines in May in Ashburn?
What are the months with the highest UV index in Ashburn?
What is the UV index intensity in May in Ashburn?
Average temperature in May
Ashburn, VA
- Average high temperature in May: 75°F
The warmest month (with the highest average high temperature) is July (87.8°F).
The month with the lowest average high temperature is January (39.7°F).
- Average low temperature in May: 55°F
The month with the highest average low temperature is July (67.3°F).
The coldest month (with the lowest average low temperature) is January (25.9°F).
Average pressure in May
Ashburn, 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
Ashburn, VA
- Average wind speed in May: 6mph
The windiest month (with the highest average wind speed) is March (7.5mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).
Average humidity in May
Ashburn, VA
- Average humidity in May: 76%
The month with the highest relative humidity is December (78%).
The month with the lowest relative humidity is July (70%).
Average rainfall in May
Ashburn, VA
- Average rainfall in May: 3.11"
The wettest month (with the highest rainfall) is August (3.78").
The driest month (with the least rainfall) is September (1.93").
Average rainfall days in May
Ashburn, VA
- 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 (9.3 days).
Average snowfall in May
Ashburn, VA
- Average snowfall in May: 0"
The month with the highest snowfall is January (3.54").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in May
Ashburn, VA
- 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
Ashburn, VA
- 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 4min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The months with the least sunshine are January, February and December (Average sunshine: 5h and 0min).
Average sunshine days in May
Ashburn, VA
- Average sunshine days in May: 12.1 days
The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is July (11.8 days).
Average UV index in May
Ashburn, 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
Ashburn, VA
- Average cloud cover in May: 45
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
Ashburn, VA
- 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).
Ashburn, Virginia, USA
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