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 advent of March denotes an average high-temperature of a frosty 43.9°F (6.6°C), subtly different from February's 38.8°F (3.8°C). Port Jefferson notes a steady average temperature of 36°F (2.2°C) during the nights of March.Humidity
In March, the average relative humidity is 72%.Rainfall
In Port Jefferson, New York, during March, the rain falls for 10.5 days and regularly aggregates up to 2.6" (66mm) of precipitation. In Port Jefferson, during the entire year, the rain falls for 146.8 days and collects up to 33.78" (858mm) of precipitation.Snowfall
Months with snowfall are January through March, October through December. March is the month with the most snowfall. Snow falls for 2.3 days and accumulates 2.13" (54mm) of snow.Ocean temperature
In Port Jefferson, in March, the average water temperature is 40.5°F (4.7°C).Note: During the act of swimming, this is a direct threat to life. Breathing becomes erratic and cognitive abilities decline rapidly. The importance of a specialized swimsuit to minimize thermal loss is paramount.
Daylight
In March, the average length of the day in Port Jefferson is 11h and 58min.On the first day of March, sunrise is at 6:25 am and sunset at 5:43 pm EST. On the last day of the month, sunrise is at 6:35 am and sunset at 7:16 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 Port Jefferson, the average sunshine in March is 6.3h.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 ordinary individuals.Note: The UV index of 2 during March leads to these advisories:
Extended time in the sun generally does not harm most, but those with sensitive skin, infants, and children should always be protected. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage. Take warning! The intensity of the Sun's UV radiation can be nearly amplified twice due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is March?
What is the average humidity in March?
How many days does it rain in March?
What is the snowiest month?
What is the last month it snows in Port Jefferson?
What is the water temperature in March?
What is the average length of the day in March?
What time are sunrise and sunset in March?
When does Daylight Saving Time (DST) start in March?
How long on average sun shines in March?
What is the month with the lowest UV index?
What is the UV index intensity in March in Port Jefferson?
Average temperature in March
Port Jefferson, NY
- Average high temperature in March: 43.9°F
The warmest month (with the highest average high temperature) is July (79.2°F).
The month with the lowest average high temperature is January (37.6°F).
- Average low temperature in March: 36°F
The months with the highest average low temperature are July and August (71.1°F).
The coldest month (with the lowest average low temperature) is January (29.1°F).
Average pressure in March
Port Jefferson, NY
- 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
Port Jefferson, NY
- Average wind speed in March: 12.2mph
The windiest month (with the highest average wind speed) is January (12.9mph).
The calmest month (with the lowest average wind speed) is July (8.3mph).
Average humidity in March
Port Jefferson, NY
- Average humidity in March: 72%
The months with the highest relative humidity are May and June (77%).
The month with the lowest relative humidity is November (71%).
Average rainfall in March
Port Jefferson, NY
- Average rainfall in March: 2.6"
The wettest month (with the highest rainfall) is December (3.58").
The driest month (with the least rainfall) is January (2.05").
Average rainfall days in March
Port Jefferson, NY
- Average rainfall days in March: 10.5 days
The month with the highest number of rainy days is July (16.5 days).
The month with the least rainy days is January (6.8 days).
Average snowfall in March
Port Jefferson, NY
- Average snowfall in March: 2.13"
The month with the highest snowfall is March (2.13").
The months with the least snowfall are April, May, June, July, August and September (0").
Average snowfall days in March
Port Jefferson, NY
- Average snowfall days in March: 2.3 days
The month with the highest number of snowfall days is February (4.4 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average sea temperature in March
Port Jefferson, NY
- Average sea temperature in March: 40.4°F
The best month for swimming (with the highest average sea temperature) is August (74°F).
The coldest month (with the lowest average sea temperature) is February (39.7°F).
Average daylight in March /
Average sunshine in March
Port Jefferson, NY
- 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 month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in March
Port Jefferson, NY
- Average sunshine days in March: 17.3 days
The month with the most sunshine days is November (20.5 days).
The month with the least sunshine days is July (13 days).
Average UV index in March
Port Jefferson, NY
- 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
Port Jefferson, NY
- Average cloud cover in March: 47
The month with the most cloud cover is December (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in March
Port Jefferson, NY
- 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).
Port Jefferson, New York, USA
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