Contents
- Weather in March
- Frequently asked questions
- Average temperature in March
- Average pressure in March
- Average wind speed in March
- Average humidity in March
- Average rainfall in March
- Average rainfall days in March
- Average snowfall in March
- Average snowfall days in March
- Average sea temperature in March
- Average daylight in March
- Average sunshine in March
- Average sunshine days in March
- Average UV index in March
- Average cloud cover in March
- Average visibility in March
Weather in March
Temperature
The onset of March introduces a subtle rise in the average high-temperature, nudging from an icy 38.5°F (3.6°C) in February to a frosty 45°F (7.2°C). During March, Old Greenwich's temperature falls to a steady low-temperature average of 34.2°F (1.2°C).Humidity
In March, the average relative humidity is 72%.Rainfall
In Old Greenwich, Connecticut, during March, the rain falls for 13.2 days and regularly aggregates up to 2.95" (75mm) of precipitation. In Old Greenwich, during the entire year, the rain falls for 166.6 days and collects up to 38.07" (967mm) of precipitation.Snowfall
Months with snowfall are January through April, November and December. In March, it is snowing for 4.6 days. Throughout March, 2.56" (65mm) of snow is accumulated. In Old Greenwich, during the entire year, snow falls for 24.8 days and aggregates up to 9.33" (237mm) of snow.Ocean temperature
In March, the average ocean temperature is 39.7°F (4.3°C).Note: While participating in swimming, this is a serious life-threatening situation. Breathing becomes unmanageable, making lucid thinking almost impossible. The use of a specialized swimsuit is crucial to control thermal loss.
Daylight
In Old Greenwich, the average length of the day in March is 11h and 58min.On the first day of March, sunrise is at 6:27 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.
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 Greenwich, 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. A UV Index estimate of 2, and below, represents a low health risk from exposure to the Sun's UV rays for the average person.Note: The daily high UV index of 2 in March translates into this advice:
Prolonged sun exposure generally does not trouble most people. However, it is vital to ensure protection for babies, children, and individuals with sensitive skin. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Always opt for UVA and UVB-resistant sunglasses on radiant days. Take careful note! The UV radiation of the Sun can be nearly doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Old Greenwich in March?
What is the average humidity in March?
How much does it rain in March?
How many days does it snow in March?
How cold is the water in March?
What is the average length of the day in March?
When are sunrise and sunset in March?
When does Daylight Saving Time (DST) start in March?
How long on average sun shines in March?
What are the months with the lowest UV index?
What is the UV index reading in March?
Average temperature in March
Old Greenwich, CT
- Average high temperature in March: 45°F
The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is January (36°F).
- Average low temperature in March: 34.2°F
The month with the highest average low temperature is July (69.3°F).
The coldest month (with the lowest average low temperature) is January (26.2°F).
Average pressure in March
Old Greenwich, 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
Old Greenwich, CT
- Average wind speed in March: 9.8mph
The windiest month (with the highest average wind speed) is January (10.1mph).
The calmest month (with the lowest average wind speed) is July (6.6mph).
Average humidity in March
Old Greenwich, CT
- Average humidity in March: 72%
The months with the highest relative humidity are February, May, June and December (75%).
The month with the lowest relative humidity is August (71%).
Average rainfall in March
Old Greenwich, CT
- Average rainfall in March: 2.95"
The wettest month (with the highest rainfall) is July (4.13").
The driest month (with the least rainfall) is January (2.44").
Average rainfall days in March
Old Greenwich, CT
- Average rainfall days in March: 13.2 days
The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is January (8.6 days).
Average snowfall in March
Old Greenwich, CT
- Average snowfall in March: 2.56"
The month with the highest snowfall is February (2.6").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in March
Old Greenwich, CT
- Average snowfall days in March: 4.6 days
The month with the highest number of snowfall days is February (7.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average sea temperature in March
Old Greenwich, CT
- Average sea temperature in March: 39.7°F
The best month for swimming (with the highest average sea temperature) is August (73.1°F).
The coldest month (with the lowest average sea temperature) is February (39.5°F).
Average daylight in March /
Average sunshine in March
Old Greenwich, 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 months with the least sunshine are February and December (Average sunshine: 4h and 42min).
Average sunshine days in March
Old Greenwich, CT
- Average sunshine days in March: 13.6 days
The month with the most sunshine days is November (17.9 days).
The month with the least sunshine days is June (11.1 days).
Average UV index in March
Old Greenwich, 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
Old Greenwich, CT
- Average cloud cover in March: 48
The month with the most cloud cover is December (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in March
Old Greenwich, 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).
Old Greenwich, Connecticut, USA
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