May weather forecastRockville, CT
May
Weather in May
May, the last month of the spring in Rockville, is a pleasant month, with an average temperature fluctuating between 68.4°F (20.2°C) and 48.6°F (9.2°C).Temperature
Rockville in May sees a temperature change, with average high-temperatures moving from a mild 56.3°F (13.5°C) in April to an agreeable 68.4°F (20.2°C). Rockville experiences a mean low-temperature of 48.6°F (9.2°C) during May.Humidity
In Rockville, the average relative humidity in May is 75%.Rainfall
The wettest months in Rockville are May through July, with an average 1.1" (28mm) of rainfall.Snowfall
Months with snowfall in Rockville are January through May, November and December. May is the last month it regularly snows. During 0.1 snowfall days, in May, Rockville aggregates 0.04" (1mm) of snow. In Rockville, during the entire year, snow falls for 23.1 days and aggregates up to 4.69" (119mm) of snow.Daylight
The average length of the day in May is 14h and 34min.On the first day of May, sunrise is at 5:44 am and sunset at 7:48 pm. On the last day of the month, sunrise is at 5:17 am and sunset at 8:18 pm EDT.
Sunshine
In Rockville, the average sunshine in May is 8.3h.UV index
The average daily maximum UV index in May in Rockville is 5. A UV Index estimate of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The daily high UV index of 5 in May translates into this advice:
Exercise prudence. Persons with fair skin could be burned in under 30 minutes. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Rockville, CT
- Average high temperature in May: 68.4°F
The warmest month (with the highest average high temperature) is July (82.2°F).
The month with the lowest average high temperature is January (32.4°F).
- Average low temperature in May: 48.6°F
The month with the highest average low temperature is July (62.6°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).
Average pressure in May
Rockville, CT
- Average pressure in May: 30.01"Hg
The month with the highest atmospheric pressure is November (30.08"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in May
Rockville, CT
- Average wind speed in May: 6.6mph
The windiest months (with the highest average wind speed) are January and March (8.2mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).
Average humidity in May
Rockville, CT
- Average humidity in May: 75%
The month with the highest relative humidity is February (80%).
The month with the lowest relative humidity is April (71%).
Average rainfall in May
Rockville, CT
- Average rainfall in May: 1.1"
The wettest months (with the highest rainfall) are May, June and July (1.1").
The driest month (with the least rainfall) is September (0.39").
Average rainfall days in May
Rockville, CT
- Average rainfall days in May: 11.5 days
The month with the highest number of rainy days is June (12.1 days).
The months with the least rainy days are January and February (5.5 days).
Average snowfall in May
Rockville, CT
- Average snowfall in May: 0.04"
The month with the highest snowfall is February (1.5").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in May
Rockville, CT
- Average snowfall days in May: 0.1 days
The month with the highest number of snowfall days is February (6.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Rockville, CT
- Average daylight in May: 14h and 36min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in May: 8h and 18min
The months with the most sunshine are July and August (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days in May
Rockville, CT
- Average sunshine days in May: 17.3 days
The month with the most sunshine days is January (21.9 days).
The month with the least sunshine days is June (15.7 days).
Average UV index in May
Rockville, CT
- Average UV index in May: 5
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in May
Rockville, CT
- Average cloud cover in May: 48
The months with the most cloud cover are February and March (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility in May
Rockville, CT
- Average visibility in May: 5mi
The months with the highest visibility are January, March, April, October, November and December (6mi).
The months with the lowest visibility are February, May, June, July, August and September (5mi).
