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 Chantilly's weather, with average high-temperatures moving from April's enjoyable 64.9°F (18.3°C) to a moderately hot 75°F (23.9°C). During the nights in May, Chantilly experiences a consistent average temperature of 55°F (12.8°C).Humidity
In Chantilly, the average relative humidity in May is 76%.Rainfall
In Chantilly, Virginia, during May, the rain falls for 17.5 days and regularly aggregates up to 3.15" (80mm) of precipitation. Throughout the year, there are 156 rainfall days, and 31.18" (792mm) of precipitation is accumulated.Snowfall
In Chantilly, snow does not fall in May through October.Daylight
In Chantilly, the average length of the day in May is 14h and 19min.On the first day of the month, sunrise is at 6:10 am and sunset at 8:02 pm. On the last day of May, in Chantilly, sunrise is at 5:46 am and sunset at 8:28 pm EDT.
Sunshine
In May, the average sunshine in Chantilly is 8.8h.UV index
The months with the highest UV index in Chantilly are May through August, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation for the ordinary person.Note: In May, the maximum UV index of 6 transforms into these recommendations:
Take precautions against overexposure. Protection against sun damage is needed. Between 10 a.m. and 4 p.m., UV radiation is strongest. Make an effort to avoid direct sunlight during this time, remembering that shade structures may not provide full sun protection. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.
Frequently asked questions
What is the temperature in May in Chantilly?
What is the average humidity in May in Chantilly?
How much does it rain in Chantilly in May?
When it does not snow in Chantilly?
Does it snow in Chantilly in May?
How many hours of daylight does Chantilly have in May?
When are sunrise and sunset in May in Chantilly?
How long on average sun shines in May in Chantilly?
What are the months with the highest UV index in Chantilly?
What is the UV index intensity in May in Chantilly?
Average temperature in May
Chantilly, VA
- Average high temperature in May: 75°F
The warmest month (with the highest average high temperature) is July (88.2°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 (25.7°F).
Average pressure in May
Chantilly, 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
Chantilly, VA
- Average wind speed in May: 6mph
The windiest months (with the highest average wind speed) are March and April (7.3mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).
Average humidity in May
Chantilly, VA
- Average humidity in May: 76%
The months with the highest relative humidity are October and December (77%).
The month with the lowest relative humidity is July (71%).
Average rainfall in May
Chantilly, VA
- Average rainfall in May: 3.15"
The wettest month (with the highest rainfall) is August (3.74").
The driest month (with the least rainfall) is September (1.89").
Average rainfall days in May
Chantilly, 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 November (9.3 days).
Average snowfall in May
Chantilly, VA
- Average snowfall in May: 0"
The month with the highest snowfall is January (3.58").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in May
Chantilly, VA
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is February (5.3 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
Chantilly, 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 5min
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 6min).
Average sunshine days in May
Chantilly, VA
- Average sunshine days in May: 12.2 days
The month with the most sunshine days is November (19.6 days).
The month with the least sunshine days is July (12.1 days).
Average UV index in May
Chantilly, 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
Chantilly, VA
- 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
Chantilly, VA
- Average visibility in May: 5mi
The months with the highest visibility are February, March, April, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and May (5mi).
Chantilly, Virginia, USA
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