March weather forecast
Groton, CT

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Weather in March

The weather in March in Groton, Connecticut, brings a significant transition from winter chills to spring's mild temperatures with lows averaging from 27°F in February to 32.9°F. The days get longer, and spring activities commence in full swing. A slight increase in rainfall contributes to the blossoming of the flora, making cityscapes and countrysides picturesque. The clouds start to clear, increasing the hours of sunlight significantly. March is a month of a meteorological shift, embodying the essence of the spring season.

Temperature

Groton's weather shows a minor temperature rise with the arrival of March, moving from a cold 37.9°F in February to a frosty 43.3°F. Groton experiences a steady low-temperature of 32.9°F throughout March.

Humidity

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

Rainfall

In Groton, in March, during 13.8 rainfall days, 2.95" of precipitation is typically accumulated. Throughout the year, in Groton, Connecticut, there are 159.8 rainfall days, and 33.07" of precipitation is accumulated.

Snowfall

January through April, November and December are months with snowfall. The month with the most snowfall is March, when snow falls for 5.1 days and typically aggregates up to 2.56" of snow.

Ocean temperature

In Groton, in March, the average water temperature is 39.7°F.
Note: During swimming events, this situation presents an imminent life risk. Instantaneous loss of breath control makes clear thinking a near impossibility. A specialized swimsuit is compulsory to limit thermal dissipation.

Daylight

In March, the average length of the day is 11h and 58min.
On the first day of the month, sunrise is at 6:22 am and sunset at 5:38 pm EST. On the last day of March, in Groton, sunrise is at 6:32 am and sunset at 7:12 pm EDT.
Note: On Sunday, March 12. 2023, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. Daylight Saving Time lasts until Sunday, November 5. 2023, at 2:00 am; consequently, the time zone reverts from EDT to EST.

Sunshine

The average sunshine in March is 6.2h.

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 reading of 2, and below, represents a minimal health hazard from unprotected exposure to Sun's UV rays for average individuals.
Note: In March, a regular UV index of 2 translates into these guidelines:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. 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. Alert! The snow's reflection can amplify the UV radiation of the Sun nearly twice.
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FAQ

How cold is it in Groton in March?

In Groton, in March, the average high-temperature is 43.3°F, and the average low-temperature is 32.9°F.

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 March in Groton?

In March, the average relative humidity is 74%.

How much does it rain in Groton in March?

In Groton, Connecticut, during March, the rain falls for 13.8 days and regularly aggregates up to 2.95" of precipitation.

When does it snow the most in Groton?

The month with the most snowfall is March, when snow falls for 5.1 days and typically aggregates up to 2.56" of snow.

How many days does it snow in March in Groton?

In Groton, during March, snow falls for 5.1 days and regularly aggregates up to 2.56" of snow.

What is the ocean temperature in March in Groton?

In March, the average ocean temperature is 39.7°F. For swimming, this is considered very dangerous and immediately life-threatening. Total loss of breathing control instantly occurs, and clear thinking becomes almost impossible. A specialized swimsuit is obligatory to minimize thermal loss.

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

In March, the average day length is 11h and 58min.

When are sunrise and sunset in March in Groton?

On the first day of March in Groton, sunrise is at 6:22 am and sunset at 5:38 pm EST. On the last day of the month, sunrise is at 6:32 am and sunset at 7:12 pm EDT.

When does Daylight Saving Time (DST) start in March in Groton?

On Sunday, March 12. 2023, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. DST ends Sunday, November 5. 2023, at 2:00 am.

How long on average sun shines in March in Groton?

The average sunshine duration in March in Groton, Connecticut, is 6.2h.

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

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

What is the UV index reading in March in Groton?

The average daily maximum UV index in March in Groton is 2. A UV Index estimate of 2, and below, represents a low health threat from exposure to the Sun's UV radiation.
Today
Tomorrow
Long-term
YearJFMarchAMJJASOND
Feb
March
Apr
Average high temperature
37.9°F
43.3°F
53.4°F
Average low temperature
27°F
32.9°F
42.4°F
Average pressure
30.01"Hg
30.04"Hg
29.98"Hg
Average wind speed
11.5mph
11.4mph
10.6mph
Average max. wind speed
12.2mph
12.1mph
11.4mph
Average wind speed gusts
18.2mph
17.8mph
17mph
Average humidity
77%
74%
74%
Average rainfall
2.48"
2.95"
3.11"
Average rainfall days
9.5
13.8
14.9
Average snowfall
1.85"
2.56"
0.08"
Average snowfall days
6.8
5.1
0.7
Average sea temperature
38.8°F
39.8°F
44.4°F
Average daylight
10h 4min
12h 0min
13h 2min
Average sunshine
4h 5min
6h 1min
8h 2min
Average sunshine days
12.5
13.5
13.8
Average UV index
2
2
3
Average cloud cover
47%
47%
44%
Average visibility
6mi
6mi
6mi

Average temperature in March
Groton, CT

Average temperature in March - Groton, CT
  • Average high temperature in March: 43.3°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 March: 32.9°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 March
Groton, CT

Average pressure in March - Groton, CT
  • Average pressure in March: 30.04"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 March
Groton, CT

Average wind speed in March - Groton, CT
  • Average wind speed in March: 11.4mph

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 March
Groton, CT

Average humidity in March - Groton, CT
  • Average humidity in March: 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 March
Groton, CT

Average rainfall in March - Groton, CT
  • Average rainfall in March: 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 March
Groton, CT

Average rainfall days in March - Groton, CT
  • Average rainfall days in March: 13.8 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 March
Groton, CT

Average snowfall in March - Groton, CT
  • Average snowfall in March: 2.56"

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 March
Groton, CT

Average snowfall days in March - Groton, CT
  • Average snowfall days in March: 5.1 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 March
Groton, CT

Average sea temperature in March - Groton, CT
  • Average sea temperature in March: 39.8°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 March /
Average sunshine in March
Groton, CT

Average daylight in March / Average sunshine in March - Groton, CT
  • Average daylight in March: 12h and 0min

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 March: 6h and 1min

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 March
Groton, CT

Average sunshine days in March - Groton, CT
  • Average sunshine days in March: 13.5 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 March
Groton, CT

Average UV index in March - Groton, CT
  • Average UV index in March: 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 March
Groton, CT

Average cloud cover in March - Groton, CT
  • Average cloud cover in March: 47

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 March
Groton, CT

Average visibility in March - Groton, CT
  • Average visibility in March: 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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