November weather forecast
Groton, CT

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Weather in November

As November steps in Groton, the city braces itself for winter. The weather turns silver as daylight hours reduce, and rainfall averages increase up to 2.95" (75mm). A complete halt in the beach and boating activities marks the day. An increase in the intensity of cold weather sets into the city's daily life. Visitors and residents wrap up warmly, preparing for the winter festivities while savoring hot coffees and soups in the chilly November weather.

Temperature

In the transition to November, Groton observes a drop in the average high-temperature, moving from a refreshing 61.7°F (16.5°C) in October to a cool 50.9°F (10.5°C). During November nights, Groton witnesses a consistent average temperature of 40.6°F (4.8°C).

Humidity

January, March, April and November, with an average relative humidity of 74%, are the least humid months.

Rainfall

In November, the rain falls for 10.7 days. Throughout November, 2.95" (75mm) of precipitation is accumulated. Throughout the year, in Groton, Connecticut, there are 159.8 rainfall days, and 33.07" (840mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through April, November and December. November is the first month it typically snows in Groton. Throughout November, in the average 0.6 snowfall days, it receives 0.16" (4mm) of snow. In Groton, during the entire year, snow falls for 24 days and aggregates up to 7.68" (195mm) of snow.

Ocean temperature

In November, the average ocean temperature is 55.4°F (13°C).
Note: With an efficient thermal swimsuit, one can navigate 55.4°F (13°C) even if it's colder than 50°F (10°C); otherwise, rapid cold shock and breathlessness might set in. Barely wading at 55.4°F (13°C) feels chilly.

Daylight

The average length of the day in November in Groton is 9h and 53min.
On the first day of the month, sunrise is at 7:20 am and sunset at 5:43 pm EDT. On the last day of November, in Groton, sunrise is at 6:54 am and sunset at 4:20 pm EST.
Note: On Sunday, November 3. 2024, at 2:00 am, Daylight Saving Time ends, and the time zone changes from EDT to EST. Daylight Saving Time starts again on Sunday, March 9. 2025, at 2:00 am; consequently, the time zone reverts from EST to EDT.

Sunshine

In Groton, the average sunshine in November is 5.5h.

UV index

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Groton. A UV Index value of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The average daily UV index of 2 in November transforms into the following instructions:
Prolonged sun exposure should always be prevented in babies, children, and those with sensitive skin. It's recommended to limit sun exposure when its radiation is at its peak during midday. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck. Be prepared! The intensity of the Sun's UV radiation can be amplified nearly double due to snow reflection.
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Frequently asked questions

What are November temperatures in Groton?

In November, in Groton, the average high-temperature is 50.9°F (10.5°C), and the average low-temperature is 40.6°F (4.8°C).

What is the least humid month in Groton?

The months with the lowest humidity are January, March, April and November, with an average relative humidity of 74%.

What is the average humidity in November in Groton?

In November, the average relative humidity in Groton, Connecticut, is 74%.

How much does it rain in Groton in November?

In November, in Groton, the rain falls for 10.7 days. Throughout November, 2.95" (75mm) of precipitation is accumulated.

When does it start to snow in Groton?

November is the first month it typically snows in Groton, Connecticut. Throughout November, in the average 0.6 snowfall days, it receives 0.16" (4mm) of snow.

How cold is the water in November in Groton?

In Groton, Connecticut, in November, the average water temperature is 55.4°F (13°C). Swimming in 55.4°F (13°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.

What is the average length of the day in November in Groton?

The average day length in November in Groton is 9h and 53min.

When is the sunrise / sunset in November in Groton?

On the first day of November in Groton, sunrise is at 7:20 am and sunset at 5:43 pm EDT. On the last day of the month, sunrise is at 6:54 am and sunset at 4:20 pm EST.

When does Daylight Saving Time (DST) end in November in Groton?

On Sunday, November 3. 2024, at 2:00 am, Daylight Saving Time ends in Groton, Connecticut, and the time zone changes from EDT to EST. The next DST starts Sunday, March 9. 2025, at 2:00 am.

How long on average sun shines in November in Groton?

In Groton, Connecticut, the average sunshine duration in November is 5.5h.

What are the months with the lowest UV index in Groton?

The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2.

What is the UV index intensity in November in Groton?

The average daily maximum UV index in November in Groton is 2. A UV Index reading of 2, and below, represents a low health risk from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in November
Groton, CT

Average temperature in November - Groton, CT
  • Average high temperature in November: 50.9°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 November: 40.6°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 November
Groton, CT

Average pressure in November - Groton, CT
  • Average pressure in November: 30.08"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 November
Groton, CT

Average wind speed in November - Groton, CT
  • Average wind speed in November: 11.1mph

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 November
Groton, CT

Average humidity in November - Groton, CT
  • Average humidity in November: 74%

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 November
Groton, CT

Average rainfall in November - Groton, CT
  • Average rainfall in November: 2.95"

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 November
Groton, CT

Average rainfall days in November - Groton, CT
  • Average rainfall days in November: 10.7 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 November
Groton, CT

Average snowfall in November - Groton, CT
  • Average snowfall in November: 0.16"

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 November
Groton, CT

Average snowfall days in November - Groton, CT
  • Average snowfall days in November: 0.6 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 November
Groton, CT

Average sea temperature in November - Groton, CT
  • Average sea temperature in November: 55.4°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 November /
Average sunshine in November
Groton, CT

Average daylight in November / Average sunshine in November - Groton, CT
  • Average daylight in November: 9h and 5min

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 November: 5h and 3min

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 November
Groton, CT

Average sunshine days in November - Groton, CT
  • Average sunshine days in November: 16.5 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 November
Groton, CT

Average UV index in November - Groton, CT
  • Average UV index in November: 2

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 November
Groton, CT

Average cloud cover in November - Groton, CT
  • Average cloud cover in November: 39

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 November
Groton, CT

Average visibility in November - Groton, CT
  • Average visibility in November: 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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Groton, Connecticut, USA

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