May weather forecastOld Mystic, CT
May
Weather in May
The last month of the spring, May, is an enjoyable month in Old Mystic, Connecticut, with an average temperature varying between 50.2°F (10.1°C) and 64.9°F (18.3°C).Temperature
As Old Mystic enters May, the average high-temperature increases from the a cool 54.5°F (12.5°C) of April to a comfortable 64.9°F (18.3°C). During May, the average low-temperature is a fresh 50.2°F (10.1°C).Humidity
In Old Mystic, the average relative humidity in May is 78%.Rainfall
In Old Mystic, during May, the rain falls for 16.2 days and regularly aggregates up to 2.56" (65mm) of precipitation. In Old Mystic, during the entire year, the rain falls for 162.1 days and collects up to 33.66" (855mm) of precipitation.Snowfall
Months with snowfall are January through May, November and December. May is the last month it regularly snows. During 0.2 snowfall days, in May, Old Mystic aggregates 0.08" (2mm) of snow. In Old Mystic, during the entire year, snow falls for 26.7 days and aggregates up to 9.72" (247mm) of snow.Daylight
In May, the average length of the day in Old Mystic is 14h and 32min.On the first day of the month, sunrise is at 5:43 am and sunset at 7:45 pm. On the last day of May, sunrise is at 5:16 am and sunset at 8:14 pm EDT.
Sunshine
In May, the average sunshine is 8.3h.UV index
The average daily maximum UV index in May is 5. A UV Index reading of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In May, a regular UV index of 5 translates into these guidelines:
Ensure safety - Recommendations to avert sunburn are presented. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. Opt for tightly woven and loose clothing to enhance protection from the Sun. Take warning! The intensity of the Sun's UV radiation can be nearly amplified twice due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Old Mystic, CT
- Average high temperature in May: 64.9°F
The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (35.4°F).
- Average low temperature in May: 50.2°F
The month with the highest average low temperature is July (65.3°F).
The coldest month (with the lowest average low temperature) is January (24.8°F).
Average pressure in May
Old Mystic, 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
Old Mystic, CT
- Average wind speed in May: 8.3mph
The windiest month (with the highest average wind speed) is January (10.6mph).
The calmest month (with the lowest average wind speed) is August (6.8mph).
Average humidity in May
Old Mystic, CT
- Average humidity in May: 78%
The months with the highest relative humidity are June and July (79%).
The month with the lowest relative humidity is April (73%).
Average rainfall in May
Old Mystic, CT
- Average rainfall in May: 2.56"
The wettest month (with the highest rainfall) is December (3.78").
The driest month (with the least rainfall) is September (1.61").
Average rainfall days in May
Old Mystic, CT
- Average rainfall days in May: 16.2 days
The month with the highest number of rainy days is June (16.6 days).
The month with the least rainy days is January (10 days).
Average snowfall in May
Old Mystic, CT
- Average snowfall in May: 0.08"
The month with the highest snowfall is March (2.56").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in May
Old Mystic, CT
- Average snowfall days in May: 0.2 days
The month with the highest number of snowfall days is January (7 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in May /
Average sunshine in May
Old Mystic, CT
- Average daylight in May: 14h and 30min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in May: 8h and 18min
The month with the most sunshine is August (Average sunshine: 10h and 24min).
The months with the least sunshine are February and December (Average sunshine: 4h and 48min).
Average sunshine days in May
Old Mystic, CT
- Average sunshine days in May: 12.8 days
The month with the most sunshine days is November (17.7 days).
The month with the least sunshine days is July (11.5 days).
Average UV index in May
Old Mystic, 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
Old Mystic, CT
- Average cloud cover in May: 46
The month with the most cloud cover is March (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in May
Old Mystic, CT
- Average visibility in May: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
