March weather forecast
Old Lyme, CT

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Weather in March

The first month of the spring, March, is a chilly month in Old Lyme, Connecticut, with temperature in the range of an average low of 32.5°F (0.3°C) and an average high of 43.7°F (6.5°C).

Temperature

The shift from February to March introduces a subtle increase in the average high-temperature, moving from an icy 37.9°F (3.3°C) to a chilly 43.7°F (6.5°C). An average low-temperature of 32.5°F (0.3°C) is anticipated throughout the nights in Old Lyme during March.

Humidity

In Old Lyme, the average relative humidity in March is 74%.

Rainfall

In Old Lyme, in March, during 9.3 rainfall days, 0.59" (15mm) of precipitation is typically accumulated. Throughout the year, in Old Lyme, there are 110.7 rainfall days, and 8.58" (218mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through March, November and December. The month with the most snowfall in Old Lyme, Connecticut, is March, when snow falls for 3.8 days and typically aggregates up to 0.63" (16mm) of snow.

Daylight

The average length of the day in March is 11h and 58min.
On the first day of the month, sunrise is at 6:22 am and sunset at 5:40 pm EST. On the last day of March, sunrise is at 6:32 am and sunset at 7:13 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 Old Lyme, the average sunshine in March is 6.3h.

UV index

The months with the lowest UV index in Old Lyme are January through March, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a low health risk from unsafe exposure to UV radiation for ordinary individuals.
Note: The UV index of 2 in March translates into these instructions:
Despite most people tolerating extended sun exposure, it is critical to always protect those with sensitive skin, infants, and children. To protect against the Sun's most potent rays, avoid direct exposure around midday. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. Notice this! Nearly double the intensity of the Sun's UV radiation can be caused by snow reflection.
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Frequently asked questions

How cold is it in Old Lyme in March?

March temperatures vary between a high-temperature of 43.7°F (6.5°C) and a low-temperature of 32.5°F (0.3°C).

What is the average humidity in March in Old Lyme?

In March, the average relative humidity is 74%.

How many days does it rain in March in Old Lyme?

In Old Lyme, Connecticut, during March, the rain falls for 9.3 days and regularly aggregates up to 0.59" (15mm) of precipitation.

When does it snow the most in Old Lyme?

March is the month with the most snowfall in Old Lyme. Snow falls for 3.8 days and accumulates 0.63" (16mm) of snow.

What is the last month it snows in Old Lyme?

March is the last month it regularly snows in Old Lyme, Connecticut. During 3.8 snowfall days, in March, Old Lyme aggregates 0.63" (16mm) of snow.

How many hours of daylight does Old Lyme have in March?

The average day length in March in Old Lyme, Connecticut, is 11h and 58min.

When is the sunrise / sunset in March in Old Lyme?

On the first day of March, sunrise is at 6:22 am and sunset at 5:40 pm EST. On the last day of the month, sunrise is at 6:32 am and sunset at 7:13 pm EDT.

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

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Old Lyme, Connecticut, 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 Old Lyme?

The average sunshine duration in March in Old Lyme, Connecticut, is 6.3h.

What are the months with the lowest UV index in Old Lyme?

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

What is the UV index intensity in March in Old Lyme?

In Old Lyme, the average daily maximum UV index in March is 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unsafe 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 March
Old Lyme, CT

Average temperature in March - Old Lyme, CT
  • Average high temperature in March: 43.7°F

The warmest month (with the highest average high temperature) is July (79.5°F).
The month with the lowest average high temperature is January (35.4°F).

  • Average low temperature in March: 32.5°F

The month with the highest average low temperature is July (66.4°F).
The coldest month (with the lowest average low temperature) is January (25.7°F).

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Average pressure in March
Old Lyme, CT

Average pressure in March - Old Lyme, 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
Old Lyme, CT

Average wind speed in March - Old Lyme, CT
  • Average wind speed in March: 10.6mph

The windiest month (with the highest average wind speed) is January (11.1mph).
The calmest month (with the lowest average wind speed) is July (7.2mph).

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Average humidity in March
Old Lyme, CT

Average humidity in March - Old Lyme, CT
  • Average humidity in March: 74%

The months with the highest relative humidity are June and July (79%).
The month with the lowest relative humidity is April (73%).

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Average rainfall in March
Old Lyme, CT

Average rainfall in March - Old Lyme, CT
  • Average rainfall in March: 0.59"

The wettest month (with the highest rainfall) is December (0.94").
The driest month (with the least rainfall) is September (0.35").

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Average rainfall days in March
Old Lyme, CT

Average rainfall days in March - Old Lyme, CT
  • Average rainfall days in March: 9.3 days

The month with the highest number of rainy days is July (11.5 days).
The months with the least rainy days are February and November (6.6 days).

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Average snowfall in March
Old Lyme, CT

Average snowfall in March - Old Lyme, CT
  • Average snowfall in March: 0.63"

The month with the highest snowfall is March (0.63").
The months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in March
Old Lyme, CT

Average snowfall days in March - Old Lyme, CT
  • Average snowfall days in March: 3.8 days

The month with the highest number of snowfall days is January (5.4 days).
The months with the least snowfall days are June, July, August, September and October (0 days).

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Average daylight in March /
Average sunshine in March
Old Lyme, CT

Average daylight in March / Average sunshine in March - Old Lyme, 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 2min

The months with the most sunshine are July and August (Average sunshine: 10h and 36min).
The months with the least sunshine are February and December (Average sunshine: 4h and 48min).

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Average sunshine days in March
Old Lyme, CT

Average sunshine days in March - Old Lyme, CT
  • Average sunshine days in March: 19.2 days

The month with the most sunshine days is November (21.1 days).
The month with the least sunshine days is July (15.8 days).

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Average UV index in March
Old Lyme, CT

Average UV index in March - Old Lyme, 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
Old Lyme, CT

Average cloud cover in March - Old Lyme, CT
  • Average cloud cover in March: 47

The months with the most cloud cover are February and December (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 28).

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Average visibility in March
Old Lyme, CT

Average visibility in March - Old Lyme, 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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Old Lyme, Connecticut, USA

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