Mystic
Connecticut, USA
Long-term weather forecast
Long-term weather forecast

May weather forecast and climate
Mystic, CT

May, the last month of the spring, in Mystic, is an enjoyable month, with temperature in the range of an average high of 66.2°F (19°C) and an average low of 46.4°F (8°C).

Temperature

In Mystic, Connecticut, the average high-temperature in May rises, from a mild 55.4°F (13°C) in April, to a comfortable 66.2°F (19°C). In May, in Mystic, the average low-temperature is 46.4°F (8°C).

Rainfall

In May, in Mystic, the rain falls for 11 days. Throughout May, 3.9" (99mm) of precipitation is accumulated. Throughout the year, in Mystic, there are 122 rainfall days, and 48.1" (1222mm) of precipitation is accumulated.

Ocean temperature

In May, the average ocean temperature in Mystic is 51.8°F (11°C). Swimming in 51.8°F (11°C) is considered life-threatening. Even a few minutes in 55.4°F (13°C) water is uncomfortable, and swimming below 50°F (10°C) may cause total loss of breathing control and cold shock, depending on a person's physique.

Daylight

The average length of the day in May is 14.5h.

Sunshine

May through July, with an average of 9h of sunshine, are months with the most sunshine in Mystic, Connecticut.

UV index

In Mystic, the average daily maximum UV index in May is 7. A UV Index reading of 6 to 7 represents a high health risk from unsafe exposure to the UV radiation for the average person.
The average daily UV index of 7 transform into the following instructions:
Take precautions and utilize sun safety practices. Protection against the skin and eye damage is required. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.

What is the temperature in May in Mystic?

The average high-temperature, in May, is 66.2°F (19°C), while the average low-temperature is 46.4°F (8°C).

How much does it rain in Mystic in May?

In May, the rain falls for 11 days. Throughout May, 3.9" (99mm) of precipitation is accumulated.

How cold is the water in May in Mystic?

In May, the average ocean temperature in Mystic, Connecticut, is 51.8°F (11°C). Swimming in 51.8°F (11°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

How many hours of daylight does Mystic have in May?

In Mystic, the average length of the day in May is 14.5h.

What is the month with the most sunshine in Mystic?

Months with the most sunshine in Mystic are May through July, with an average of 9h of sunshine.

How long on average sun shines in May in Mystic?

In May, the average sunshine in Mystic is 9h.

What is the UV index reading in May in Mystic?

In May, the average daily maximum UV index in Mystic, Connecticut, is 7. A UV Index estimate of 6 to 7 represents a high health threat from the exposure to the Sun's UV radiation.
Average temperature in May - Mystic, CT
  • Average high temperature in May: 66°F

The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (36°F).

  • Average low temperature in May: 46°F

The month with the highest average low temperature is July (63°F).
The coldest month (with the lowest average low temperature) is January (19°F).

Average rainfall in May - Mystic, CT
  • Average rainfall in May: 3.9"

The wettest month (with the highest rainfall) is November (4.8").
The driest month (with the lowest rainfall) is June (3.3").

Average rainfall days in May - Mystic, CT
  • Average rainfall days in May: 11 days

The month with the highest number of rainy days is December (12 days).
Months with the lowest number of rainy days are September and October (8 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: 14.5h

The month with the longest days is June (Average daylight: 15.1h).
The month with shortest days is December (Average daylight: 9.2h).

  • Average sunshine in May: 9h

Months with most sunshine are May, June and July (Average sunshine: 9h).
Months with least sunshine are November and December (Average sunshine: 5).

Average UV index in May - Mystic, CT
  • Average UV index in May: 7

Months with the highest UV index are June, July and August (UV index 8).
The month with the lowest UV index is December (UV index 1).