May weather forecastMystic, CT
May
Weather in May
With the passing of time, May sees Mystic fully immersed in the warmth of spring, setting the stage for the impending summer. Mystic throws off its winter coat as the temperature climbs to an average high of 62.6°F (17°C). The coastal town becomes a hive of outdoor activities, including outdoor dining, hiking, and waterfront sightseeing, among others. As spring deepens, the migratory birds return, adding to the lively symphony of natural sounds. A visit to Mystic in May would promise budding landscapes, soft sunlight and vibrant flora.Temperature
May's arrival coincides with a temperature rise, moving from April's cool 52.5°F (11.4°C) to an enjoyable 62.6°F (17°C). In Mystic, an average low-temperature of 50.7°F (10.4°C) is recorded during May nights.Humidity
The average relative humidity in May is 79%.Rainfall
In Mystic, during May, the rain falls for 16.6 days and regularly aggregates up to 2.6" (66mm) of precipitation. In Mystic, during the entire year, the rain falls for 166.1 days and collects up to 34.09" (866mm) of precipitation.Snowfall
May through September are months without snowfall in Mystic.Ocean temperature
In Mystic, in May, the average water temperature is 51.8°F (11°C).Note: Unprotected swimming in 51.8°F (11°C) is dangerous due to potential cold shock. Especially when temperatures go below 50°F (10°C), leading to hyperventilation.
Daylight
In Mystic, the average length of the day in May is 14h and 31min.On the first day of the month, sunrise is at 5:44 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
The average sunshine in May is 8.6h.UV index
The average daily maximum UV index in May is 5. A UV Index reading of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for average individuals.Note: An average UV index of 5 in May transforms into this advice:
Exercise prevention - Precautions against solar damage are endorsed. To guard against the harmful effects of the Sun, minimize exposure during midday. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Mystic, CT
- Average high temperature in May: 62.6°F
The warmest month (with the highest average high temperature) is July (77.9°F).
The month with the lowest average high temperature is January (36.5°F).
- Average low temperature in May: 50.7°F
The month with the highest average low temperature is July (66.9°F).
The coldest month (with the lowest average low temperature) is January (26.6°F).
Average pressure in May
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
Mystic, CT
- Average wind speed in May: 9.6mph
The windiest month (with the highest average wind speed) is January (12.4mph).
The calmest month (with the lowest average wind speed) is August (8.1mph).
Average humidity in May
Mystic, CT
- Average humidity in May: 79%
The month with the highest relative humidity is June (81%).
The months with the lowest relative humidity are January, March, April and November (74%).
Average rainfall in May
Mystic, CT
- Average rainfall in May: 2.6"
The wettest month (with the highest rainfall) is December (3.86").
The driest month (with the least rainfall) is September (1.73").
Average rainfall days in May
Mystic, CT
- Average rainfall days in May: 16.6 days
The month with the highest number of rainy days is July (17.1 days).
The month with the least rainy days is February (10.1 days).
Average snowfall in May
Mystic, CT
- Average snowfall in May: 0"
The month with the highest snowfall is March (2.44").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in May
Mystic, CT
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (6.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average sea temperature in May
Mystic, CT
- Average sea temperature in May: 51.7°F
The best month for swimming (with the highest average sea temperature) is August (70.3°F).
The coldest month (with the lowest average sea temperature) is February (37.9°F).
Average daylight in May /
Average sunshine in May
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 36min
The month with the most sunshine is August (Average sunshine: 10h and 36min).
The months with the least sunshine are February and December (Average sunshine: 4h and 54min).
Average sunshine days in May
Mystic, CT
- Average sunshine days in May: 12.2 days
The month with the most sunshine days is November (16.5 days).
The months with the least sunshine days are June and July (11.7 days).
Average UV index in May
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 and December (UV index 2).
Average cloud cover in May
Mystic, CT
- Average cloud cover in May: 43
The months with the most cloud cover are February, March and December (Cloud cover 47).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in May
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).
