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 (-2.8°C) in February to 32.9°F (0.5°C). 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

In Groton, the average high-temperature in March slightly rises, from an icy 37.9°F (3.3°C) in February, to a frosty 43.3°F (6.3°C). Groton, during the nights of March, experiences an average temperature drop to a cold 32.9°F (0.5°C).

Humidity

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

Rainfall

In Groton, Connecticut, in March, it is raining for 13.8 days, with typically 2.95" (75mm) of accumulated precipitation. In Groton, during the entire year, the rain falls for 159.8 days and collects up to 33.07" (840mm) of precipitation.

Snowfall

January through April, November and December are months with snowfall in Groton. March is the month with the most snowfall. Snow falls for 5.1 days and accumulates 2.56" (65mm) of snow.

Ocean temperature

In Groton, in March, the average water temperature is 39.7°F (4.3°C).
Note: Within the context of swimming, this scenario is life-threatening. Instant loss of control over breathing impairs cognitive functions. It is essential to use a specialized swimsuit to mitigate thermal loss.

Daylight

The average length of the day in March is 11h and 58min.
On the first day of March, sunrise is at 6:21 am and sunset at 5:39 pm EST. On the last day of the month, sunrise is at 6:31 am and sunset at 7:12 pm EDT.
Note: On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. Daylight Saving Time lasts until Sunday, November 3. 2024, at 2:00 am; consequently, the time zone reverts from EDT to EST.

Sunshine

In Groton, Connecticut, the average sunshine in March is 6.2h.

UV index

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. A UV Index reading of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for average individuals.
Note: The daily maximum UV index of 2 in March interprets into the following advice:
Children necessitate constant protection from sunlight, unlike the majority, who can remain under the sun for about an hour without burning. Minimize direct exposure to the Sun during midday when its radiation is at its peak. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Take note! UV radiation from the Sun can double in intensity due to snow reflection.
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Frequently asked questions

How cold does it get in Groton in March?

The average high-temperature, in March, in Groton, is 43.3°F (6.3°C), while the average low-temperature is 32.9°F (0.5°C).

What is the least humid month in Groton?

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

What is the average humidity in March in Groton?

The average relative humidity in March in Groton, Connecticut, is 74%.

How much does it rain in Groton in March?

In Groton, Connecticut, in March, during 13.8 rainfall days, 2.95" (75mm) of precipitation is typically accumulated.

What is the snowiest month in Groton?

March is the month with the most snowfall in Groton, Connecticut. Snow falls for 5.1 days and accumulates 2.56" (65mm) of snow.

How much does it snow in Groton in March?

In Groton, in March, during 5.1 snowfall days, 2.56" (65mm) of snow is typically accumulated.

What is the water temperature in March in Groton?

In March, the average ocean temperature in Groton, Connecticut, is 39.7°F (4.3°C). For swimming, this is considered life-threatening and very dangerous. The water feels painfully cold, and hyperventilation quickly occurs. A specialized swimsuit is mandatory to reduce thermal damage.

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

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

When is the sunrise / sunset in March in Groton?

On the first day of March in Groton, Connecticut, sunrise is at 6:21 am and sunset at 5:39 pm EST. On the last day of the month, sunrise is at 6:31 am and sunset at 7:12 pm EDT.

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

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. DST ends Sunday, November 3. 2024, at 2:00 am.

How long on average sun shines in March in Groton?

In March, the average sunshine duration is 6.2h.

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

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

How high is the UV index in March in Groton?

In March, the average daily maximum UV index in Groton is 2. A UV Index value of 2, and less, symbolizes a low health threat from unsafe exposure to Sun's UV rays.
Today
Tomorrow
Long-term
YearJFMarchAMJJASOND
Feb
March
Apr
Average high temperature
37.9°F 3.3°C
43.3°F 6.3°C
53.4°F 11.9°C
Average low temperature
27°F -2.8°C
32.9°F 0.5°C
42.4°F 5.8°C
Average pressure
30.01" 762mmHg
30.04" 763mmHg
29.98" 761mmHg
Average wind speed
11.5mph 18.5km/h
11.4mph 18.3km/h
10.6mph 17.1km/h
Average max. wind speed
12.2mph 19.6km/h
12.1mph 19.5km/h
11.4mph 18.3km/h
Average wind speed gusts
18.2mph 29.3km/h
17.8mph 28.6km/h
17mph 27.4km/h
Average humidity
77%
74%
74%
Average rainfall
2.48" 63mm
2.95" 75mm
3.11" 79mm
Average rainfall days
9.5
13.8
14.9
Average snowfall
1.85" 47mm
2.56" 65mm
0.08" 2mm
Average snowfall days
6.8
5.1
0.7
Average sea temperature
38.8°F 3.8°C
39.8°F 4.3°C
44.4°F 6.9°C
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 9.7km
6mi 9.7km
6mi 9.7km

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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