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
May's onset brings a temperature rise, moving from a pleasant 68.2°F (20.1°C) in April to a moderately hot 78.1°F (25.6°C). May is noted for a mean low-temperature of 58.1°F (14.5°C).Humidity
The average relative humidity in May is 74%.Rainfall
In Rockville, in May, it is raining for 16.6 days, with typically 2.36" (60mm) of accumulated precipitation. In Rockville, Virginia, during the entire year, the rain falls for 151.1 days and collects up to 26.22" (666mm) of precipitation.Snowfall
In Rockville, Virginia, snow does not fall in May through October.Daylight
The average length of the day in May is 14h and 13min.On the first day of the month, sunrise is at 6:14 am and sunset at 8:01 pm. On the last day of May, sunrise is at 5:50 am and sunset at 8:26 pm EDT.
Sunshine
The average sunshine in May in Rockville, Virginia, is 9.2h.UV index
In May, the average daily maximum UV index in Rockville, Virginia, is 6. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: The maximum daily UV index of 6 during May translates into the following directions:
Persist with safeguards and heed sun safety doctrines. Keeping sunburn at bay is of prime importance. Stay in the shade and limit direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is particularly strong. Remember, however, that shade structures may not provide complete protection. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.
Frequently asked questions
What is the usual temperature for Rockville in May?
What is the average humidity in May in Rockville?
How many days does it rain in May in Rockville?
When it does not snow in Rockville?
Does it snow in Rockville in May?
What is the average length of the day in May in Rockville?
When is the sunrise / sunset in May in Rockville?
How many hours of sunshine does Rockville have in May?
What is the UV index reading in May in Rockville?
Average temperature in May
Rockville, VA
- Average high temperature in May: 78.1°F
The warmest month (with the highest average high temperature) is July (90.7°F).
The month with the lowest average high temperature is January (44.2°F).
- Average low temperature in May: 58.1°F
The month with the highest average low temperature is July (69.6°F).
The coldest month (with the lowest average low temperature) is January (29.5°F).
Average pressure in May
Rockville, VA
- Average pressure in May: 30.02"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
Rockville, VA
- Average wind speed in May: 6.3mph
The windiest month (with the highest average wind speed) is April (7.4mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).
Average humidity in May
Rockville, VA
- Average humidity in May: 74%
The month with the highest relative humidity is December (78%).
The month with the lowest relative humidity is July (68%).
Average rainfall in May
Rockville, VA
- Average rainfall in May: 2.36"
The wettest month (with the highest rainfall) is August (2.72").
The driest month (with the least rainfall) is September (1.65").
Average rainfall days in May
Rockville, VA
- Average rainfall days in May: 16.6 days
The month with the highest number of rainy days is May (16.6 days).
The month with the least rainy days is November (8.8 days).
Average snowfall in May
Rockville, VA
- Average snowfall in May: 0"
The month with the highest snowfall is February (1.77").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in May
Rockville, VA
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is February (3.5 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
Rockville, VA
- Average daylight in May: 14h and 1min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in May: 9h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 5h and 12min).
Average sunshine days in May
Rockville, VA
- Average sunshine days in May: 11.9 days
The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is May (11.9 days).
Average UV index in May
Rockville, VA
- Average UV index in May: 6
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover in May
Rockville, VA
- Average cloud cover in May: 42
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
Rockville, 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).
Rockville, Virginia, USA
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