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
A slight uplift in the average high-temperature marks March, adjusting from February's 34.2°F (1.2°C) to a still wintry 40.5°F (4.7°C). In March, in Portsmouth, the average low-temperature is a subzero cold 28.8°F (-1.8°C).Humidity
In March, the average relative humidity is 78%.Rainfall
In March, the rain falls for 11.8 days. Throughout March, 2.4" (61mm) of precipitation is accumulated. In Portsmouth, during the entire year, the rain falls for 144.2 days and collects up to 27.48" (698mm) of precipitation.Snowfall
January through April, October through December are months with snowfall. In Portsmouth, in March, during 6.8 snowfall days, 2.68" (68mm) of snow is typically accumulated. Throughout the year, there are 35.2 snowfall days, and 16.97" (431mm) of snow is accumulated.Ocean temperature
With an average ocean temperature of 38.5°F (3.6°C), March is the month with the coldest seawater.Note: Regarding swimming, this is extremely cold, hazardous, and can lead to death. Hypothermia sets in rapidly without the protection of insulating waterproof gear.
Daylight
In March, the average length of the day is 11h and 58min.On the first day of the month, sunrise is at 6:17 am and sunset at 5:32 pm EST. On the last day of March, sunrise is at 6:25 am and sunset at 7:08 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
The average sunshine in March is 5.8h.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 of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: The daily high UV index of 2 in March translates into this advice:
Many can withstand an hour in the sun without burning, yet children must always have protection against sunlight. When the Sun is at its strongest around midday, find shade and limit exposure. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Be careful! The Sun's UV radiation can nearly be doubled by the reflective quality of snow.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is March cold?
What is the average humidity in March?
How many days does it rain in March?
How many days does it snow in March?
When is the ocean coldest?
How cold is the water in March in Portsmouth?
How many hours of daylight does Portsmouth have in March?
When are sunrise and sunset in March in Portsmouth?
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
Portsmouth, NH
- Average high temperature in March: 40.5°F
The warmest month (with the highest average high temperature) is July (76.3°F).
The month with the lowest average high temperature is January (31.8°F).
- Average low temperature in March: 28.8°F
The month with the highest average low temperature is July (62.6°F).
The coldest month (with the lowest average low temperature) is January (21.2°F).
Average pressure in March
Portsmouth, NH
- Average pressure in March: 30.02"Hg
The month with the highest atmospheric pressure is November (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in March
Portsmouth, NH
- Average wind speed in March: 10.7mph
The windiest month (with the highest average wind speed) is January (11.7mph).
The calmest month (with the lowest average wind speed) is July (6.6mph).
Average humidity in March
Portsmouth, NH
- Average humidity in March: 78%
The month with the highest relative humidity is June (80%).
The months with the lowest relative humidity are April and November (75%).
Average rainfall in March
Portsmouth, NH
- Average rainfall in March: 2.4"
The wettest month (with the highest rainfall) is October (2.83").
The driest month (with the least rainfall) is September (1.54").
Average rainfall days in March
Portsmouth, NH
- Average rainfall days in March: 11.8 days
The month with the highest number of rainy days is June (15 days).
The month with the least rainy days is January (7.5 days).
Average snowfall in March
Portsmouth, NH
- Average snowfall in March: 2.68"
The month with the highest snowfall is January (4.02").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in March
Portsmouth, NH
- Average snowfall days in March: 6.8 days
The month with the highest number of snowfall days is January (8.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average sea temperature in March
Portsmouth, NH
- Average sea temperature in March: 38.5°F
The best month for swimming (with the highest average sea temperature) is August (65.6°F).
The coldest month (with the lowest average sea temperature) is March (38.5°F).
Average daylight in March /
Average sunshine in March
Portsmouth, NH
- Average daylight in March: 12h and 0min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in March: 5h and 5min
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 48min).
Average sunshine days in March
Portsmouth, NH
- Average sunshine days in March: 13.9 days
The month with the most sunshine days is September (16.8 days).
The month with the least sunshine days is April (13.2 days).
Average UV index in March
Portsmouth, NH
- Average UV index in March: 2
The months with the highest UV index are 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
Portsmouth, NH
- Average cloud cover in March: 50
The month with the most cloud cover is March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in March
Portsmouth, NH
- 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).
Portsmouth, New Hampshire, USA
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