June weather forecast
Groton, CT

Weather in June

The first month of the summer, June, is an agreeable month in Groton, Connecticut, with an average temperature ranging between max 71.4°F (21.9°C) and min 59°F (15°C).

Temperature

In June, the average high-temperature marginally rises from a comfortable 63.3°F (17.4°C) in May to an agreeable 71.4°F (21.9°C). The average low-temperature, in June, is 59°F (15°C).

Humidity

With an average relative humidity of 80%, June is the most humid month in Groton.

Rainfall

In Groton, during 15 rainfall days, 2.72" (69mm) of precipitation is typically accumulated. In Groton, during the entire year, the rain falls for 159.8 days and collects up to 33.07" (840mm) of precipitation.

Snowfall

May through October are months without snowfall.

Ocean temperature

In Groton, the average seawater temperature in June is 62.1°F (16.7°C).
Note: Swimming in 62.1°F (16.7°C) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 69.8°F (21°C).

Daylight

With an average of 15h and 7min of daylight, June has the longest days of the year in Groton.
On the first day of June, sunrise is at 5:17 am and sunset at 8:15 pm. On the last day of the month, sunrise is at 5:18 am and sunset at 8:25 pm EDT.

Sunshine

The average sunshine in June in Groton is 9.5h.

UV index

June through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for average individuals.
Note: The average daily UV index of 6 in June transform into the following instructions:
Take precautions and utilize sun safety practices. Protection against skin and eye damage is required. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the most humid month in Groton?

The most humid month in Groton is June, with an average relative humidity of 80%.

What is the average humidity in June in Groton?

The average relative humidity in June is 80%.

How much does it rain in Groton in June?

In Groton, Connecticut, during June, the rain falls for 15 days and regularly aggregates up to 2.72" (69mm) of precipitation.

When it does not snow in Groton?

In Groton, Connecticut, snow does not fall in May through October.

How cold is the water in June in Groton?

In Groton, Connecticut, the average seawater temperature in June is 62.1°F (16.7°C). For swimming, a surface water temperature of 62.1°F (16.7°C) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 69.8°F (21°C).

When are the longest days in Groton?

June has the longest days of the year in Groton, with an average of 15h and 7min of daylight.

How many hours of daylight does Groton have in June?

The average day length in June in Groton is 15h and 7min.

When is the sunrise / sunset in June in Groton?

In June, on the first day of the month, sunrise is at 5:17 am and sunset at 8:15 pm. On the last day of the month, sunrise is at 5:18 am and sunset at 8:25 pm EDT.

How long on average sun shines in June in Groton?

In Groton, Connecticut, the average sunshine duration in June is 9.5h.

What is the month with the highest UV index in Groton?

June through August, with an average maximum UV index of 6, are months with the highest UV index.

How high is the UV index in June in Groton?

The average daily maximum UV index in June in Groton, Connecticut, is 6. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in June
Groton, CT

Average temperature in June - Groton, CT
  • Average high temperature in June: 71.4°F

The warmest month (with the highest average high temperature) is July (78.6°F).
The month with the lowest average high temperature is January (36.1°F).

  • Average low temperature in June: 59°F

The month with the highest average low temperature is July (66.7°F).
The coldest month (with the lowest average low temperature) is January (26.2°F).

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Average pressure in June
Groton, CT

Average pressure in June - Groton, CT
  • Average pressure in June: 29.93"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).

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Average wind speed in June
Groton, CT

Average wind speed in June - Groton, CT
  • Average wind speed in June: 8.1mph

The windiest month (with the highest average wind speed) is January (11.9mph).
The calmest months (with the lowest average wind speed) are July and August (7.8mph).

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Average humidity in June
Groton, CT

Average humidity in June - Groton, CT
  • Average humidity in June: 80%

The month with the highest relative humidity is June (80%).
The months with the lowest relative humidity are January, March, April and November (74%).

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Average rainfall in June
Groton, CT

Average rainfall in June - Groton, CT
  • Average rainfall in June: 2.72"

The wettest month (with the highest rainfall) is December (3.86").
The driest month (with the least rainfall) is September (1.65").

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Average rainfall days in June
Groton, CT

Average rainfall days in June - Groton, CT
  • Average rainfall days in June: 15 days

The month with the highest number of rainy days is July (15.8 days).
The month with the least rainy days is February (9.5 days).

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Average snowfall in June
Groton, CT

Average snowfall in June - Groton, CT
  • Average snowfall in June: 0"

The month with the highest snowfall is March (2.56").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in June
Groton, CT

Average snowfall days in June - Groton, CT
  • Average snowfall days in June: 0 days

The month with the highest number of snowfall days is February (6.8 days).
The months with the least snowfall days are June, July, August, September and October (0 days).

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Average sea temperature in June
Groton, CT

Average sea temperature in June - Groton, CT
  • Average sea temperature in June: 62°F

The best month for swimming (with the highest average sea temperature) is August (72.1°F).
The coldest month (with the lowest average sea temperature) is February (38.8°F).

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Average daylight in June /
Average sunshine in June
Groton, CT

Average daylight in June / Average sunshine in June - Groton, CT
  • Average daylight in June: 15h and 7min

The month with the longest days is June (Average daylight: 15h and 7min).
The month with the shortest days is December (Average daylight: 9h and 15min).

  • Average sunshine in June: 9h and 30min

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).

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Average sunshine days in June
Groton, CT

Average sunshine days in June - Groton, CT
  • Average sunshine days in June: 12.8 days

The month with the most sunshine days is November (16.5 days).
The month with the least sunshine days is February (12.5 days).

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Average UV index in June
Groton, CT

Average UV index in June - Groton, CT
  • Average UV index in June: 6

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).

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Average cloud cover in June
Groton, CT

Average cloud cover in June - Groton, CT
  • Average cloud cover in June: 37

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 29).

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Average visibility in June
Groton, CT

Average visibility in June - Groton, CT
  • Average visibility in June: 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).

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