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 beginning of May in Rockville marks a shift in the average high-temperature, moving from April's refreshing 64.4°F (18°C) to a moderately hot 73.9°F (23.3°C). The month of May records an average low-temperature of 55.4°F (13°C) in Rockville.Humidity
In Rockville, the average relative humidity in May is 76%.Rainfall
In Rockville, during May, the rain falls for 17.1 days and regularly aggregates up to 3.03" (77mm) of precipitation. Throughout the year, there are 156.4 rainfall days, and 30.79" (782mm) of precipitation is accumulated.Snowfall
In Rockville, snow does not fall in May through October.Daylight
The average length of the day in May is 14h and 20min.On the first day of the month, sunrise is at 6:09 am and sunset at 8:01 pm. On the last day of May, in Rockville, Maryland, sunrise is at 5:44 am and sunset at 8:28 pm EDT.
Sunshine
In May, the average sunshine is 8.9h.UV index
The months with the highest UV index in Rockville are May through August, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for the average person.Note: In May, the maximum UV index of 6 suggests this advice:
Endorse precautions and be consistent with sun safety guidelines. Preventing sunburn is paramount. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is particularly strong, noting that parasols or canopies may not offer total sun protection. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.
Frequently asked questions
What is the temperature in May in Rockville?
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?
How many hours of daylight does Rockville have in May?
When is the sunrise / sunset in May in Rockville?
How long on average sun shines in May in Rockville?
What are the months with the highest UV index in Rockville?
What is the UV index reading in May in Rockville?
Average temperature in May
Rockville, MD
- Average high temperature in May: 73.9°F
The warmest month (with the highest average high temperature) is July (87.1°F).
The month with the lowest average high temperature is January (39°F).
- Average low temperature in May: 55.4°F
The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (26.2°F).
Average pressure in May
Rockville, MD
- 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
Rockville, MD
- Average wind speed in May: 6.4mph
The windiest month (with the highest average wind speed) is March (8mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in May
Rockville, MD
- Average humidity in May: 76%
The month with the highest relative humidity is December (77%).
The month with the lowest relative humidity is July (70%).
Average rainfall in May
Rockville, MD
- Average rainfall in May: 3.03"
The wettest month (with the highest rainfall) is August (3.9").
The driest month (with the least rainfall) is January (1.97").
Average rainfall days in May
Rockville, 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 November (9.2 days).
Average snowfall in May
Rockville, MD
- Average snowfall in May: 0"
The month with the highest snowfall is March (3.03").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in May
Rockville, MD
- Average snowfall days in May: 0 days
The months with the highest number of snowfall days are January and 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
Rockville, 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 30min).
- Average sunshine in May: 8h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The months with the least sunshine are January, February and December (Average sunshine: 5h and 6min).
Average sunshine days in May
Rockville, MD
- Average sunshine days in May: 12.1 days
The month with the most sunshine days is November (19.4 days).
The month with the least sunshine days is July (12 days).
Average UV index in May
Rockville, 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
Rockville, MD
- Average cloud cover in May: 44
The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 30).
Average visibility in May
Rockville, 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).
Rockville, Maryland, USA
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