March weather forecast
Norwalk, CT

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The tourist attraction spot of a stone house home to the Sheffield Island lighthouse in Norwalk, Connecticut
The tourist attraction spot of a stone house home to the Sheffield Island lighthouse in Norwalk, Connecticut

Weather in March

March signals the shift from intense winter pressures to the beginning of the spring season in Norwalk. There's an evident jump in temperature ranges from February, as the highs hit 44.4°F (6.9°C) and lows rise to 33.4°F (0.8°C). Despite the change in weather, snowfall continues albeit reduced, but residents also take notice of the beginnings of increased rainfall. Spring blossoms start appearing while winter coats are gradually replaced with lighter attire, reflecting the transition between seasons.

Temperature

The arrival of March in Norwalk brings a soft temperature shift, with the average high-temperature nudging from a wintry 38.1°F (3.4°C) in February to a frosty 44.4°F (6.9°C). March is noted for a mean low-temperature of 33.4°F (0.8°C).

Humidity

In Norwalk, the average relative humidity in March is 73%.

Rainfall

In Norwalk, in March, during 12.5 rainfall days, 2.8" (71mm) of precipitation is typically accumulated. Throughout the year, there are 166.3 rainfall days, and 37.87" (962mm) of precipitation is accumulated.

Snowfall

January through April, November and December are months with snowfall. In Norwalk, in March, snow falls for 5 days, with typically accumulated 2.64" (67mm) of snow. Throughout the year, in Norwalk, there are 24.6 snowfall days, and 9.61" (244mm) of snow is accumulated.

Ocean temperature

In Norwalk, the average seawater temperature in March is 39.7°F (4.3°C).
Note: 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.

Daylight

In Norwalk, Connecticut, the average length of the day in March is 11h and 58min.
On the first day of the month, sunrise is at 6:26 am and sunset at 5:45 pm EST. On the last day of March, in Norwalk, sunrise is at 6:37 am and sunset at 7:18 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 Norwalk, 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 Norwalk. A UV Index estimate of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for average individuals.
Note: An average maximum UV index of 2 in March leads to these recommendations:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Be watchful! The reflection of snow can enhance the intensity of the Sun's UV radiation nearly double.
Updated: Feb 10, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is it in Norwalk in March?

In Norwalk, 44.4°F (6.9°C) is the average high-temperature and 33.4°F (0.8°C) is the average low-temperature during March.

What is the average humidity in March in Norwalk?

The average relative humidity in March in Norwalk, Connecticut, is 73%.

How much does it rain in Norwalk in March?

In Norwalk, Connecticut, during March, the rain falls for 12.5 days and regularly aggregates up to 2.8" (71mm) of precipitation.

How many days does it snow in March in Norwalk?

In Norwalk, Connecticut, in March, snow falls for 5 days, with typically accumulated 2.64" (67mm) of snow.

What is the ocean temperature in March in Norwalk?

In March, the average ocean temperature 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 Norwalk?

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

When are sunrise and sunset in March in Norwalk?

On the first day of March in Norwalk, sunrise is at 6:26 am and sunset at 5:45 pm EST. On the last day of the month, sunrise is at 6:37 am and sunset at 7:18 pm EDT.

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

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

How many hours of sunshine does Norwalk have in March?

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

When is the lowest UV index in Norwalk?

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 March in Norwalk?

In March, the average daily maximum UV index in Norwalk, Connecticut, is 2. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV radiation.
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 March
Norwalk, CT

Average temperature in March - Norwalk, CT
  • Average high temperature in March: 44.4°F

The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (35.8°F).

  • Average low temperature in March: 33.4°F

The month with the highest average low temperature is July (68.2°F).
The coldest month (with the lowest average low temperature) is January (26.4°F).

Average pressure in March
Norwalk, CT

Average pressure in March - Norwalk, CT
  • Average pressure in March: 30.05"Hg

The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

Average wind speed in March
Norwalk, CT

Average wind speed in March - Norwalk, CT
  • Average wind speed in March: 9.9mph

The windiest month (with the highest average wind speed) is January (10.1mph).
The calmest month (with the lowest average wind speed) is July (6.5mph).

Average humidity in March
Norwalk, CT

Average humidity in March - Norwalk, CT
  • Average humidity in March: 73%

The months with the highest relative humidity are February, May and June (76%).
The months with the lowest relative humidity are April and November (72%).

Average rainfall in March
Norwalk, CT

Average rainfall in March - Norwalk, CT
  • Average rainfall in March: 2.8"

The wettest month (with the highest rainfall) is July (4.13").
The driest months (with the least rainfall) are January and February (2.36").

Average rainfall days in March
Norwalk, CT

Average rainfall days in March - Norwalk, CT
  • Average rainfall days in March: 12.5 days

The month with the highest number of rainy days is July (18.1 days).
The month with the least rainy days is January (8.3 days).

Average snowfall in March
Norwalk, CT

Average snowfall in March - Norwalk, CT
  • Average snowfall in March: 2.64"

The month with the highest snowfall is February (2.83").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in March
Norwalk, CT

Average snowfall days in March - Norwalk, CT
  • Average snowfall days in March: 5 days

The month with the highest number of snowfall days is February (7.4 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average sea temperature in March
Norwalk, CT

Average sea temperature in March - Norwalk, CT
  • Average sea temperature in March: 39.7°F

The best month for swimming (with the highest average sea temperature) is August (73°F).
The coldest month (with the lowest average sea temperature) is February (39°F).

Average daylight in March /
Average sunshine in March
Norwalk, CT

Average daylight in March / Average sunshine in March - Norwalk, 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 18min).

  • Average sunshine in March: 6h and 1min

The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).

Average sunshine days in March
Norwalk, CT

Average sunshine days in March - Norwalk, CT
  • Average sunshine days in March: 14.6 days

The month with the most sunshine days is January (17.8 days).
The month with the least sunshine days is June (10 days).

Average UV index in March
Norwalk, CT

Average UV index in March - Norwalk, 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).

Average cloud cover in March
Norwalk, CT

Average cloud cover in March - Norwalk, CT
  • Average cloud cover in March: 48

The months with the most cloud cover are February, March and December (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 30).

Average visibility in March
Norwalk, CT

Average visibility in March - Norwalk, 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).

Norwalk, Connecticut, USA

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