New Haven
Connecticut, USA
Long-term weather forecast
Long-term weather forecast

March weather forecast and climate
New Haven, CT

A scenic shot from above of the greeny New Haven Green in Connecticut, with the rest of the city and a far away dramatic landscape
A scenic shot from above of the greeny New Haven Green in Connecticut, with the rest of the city and a far away dramatic landscape
March, the first month of the spring, in New Haven, is a frosty month, with temperature in the range of an average high of 47.7°F (8.7°C) and an average low of 31.3°F (-0.4°C).

Temperature

In March, the average high-temperature slightly increases, from a wintry 40.5°F (4.7°C) in February, to a chilly 47.7°F (8.7°C). In March, in New Haven, the average low-temperature is 31.3°F (-0.4°C).

Rainfall

In New Haven, Connecticut, during March, the rain falls for 11 days and regularly aggregates up to 4.3" (109mm) of precipitation. In New Haven, during the entire year, the rain falls for 119 days and collects up to 47.1" (1196.6mm) of precipitation.

Ocean temperature

In New Haven, the average seawater temperature is 39.7°F (4.3°C). For swimming, this is considered extremely cold, dangerous, and life-threatening. Unless suitably protected with insulated waterproof clothing, hypothermia quickly occurs.

Daylight

The average length of the day in March is 12h.

Sunshine

The average sunshine in New Haven is 7h.

UV index

In March, the average daily maximum UV index in New Haven is 4. A UV Index of 3 to 5 symbolizes a moderate health risk from the exposure to the Sun's UV rays for ordinary individuals.
The daily maximum UV index of 4 in March interpret into the following advice:
Take precautions - Protection against sunburn is recommended. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.

What is the temperature in March in New Haven?

In New Haven, in March, the average high-temperature is 47.7°F (8.7°C), and the average low-temperature is 31.3°F (-0.4°C).

How many days does it rain in March in New Haven?

In New Haven, Connecticut, in March, during 11 rainfall days, 4.3" (109mm) of precipitation is typically accumulated.

How cold is the water in March in New Haven?

In March, the average ocean temperature in New Haven 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 New Haven?

In New Haven, the average length of the day in March is 12h.

How many hours of sunshine does New Haven have in March?

In March, the average sunshine is 7h.

What is the UV index reading in March in New Haven?

The average daily maximum UV index in March is 4. A UV Index reading of 3 to 5 represents a medium health risk from the exposure to the Sun's UV radiation.
Average temperature in March - New Haven, CT
  • Average high temperature in March: 47.6°F

The warmest month (with the highest average high temperature) is July (82.5°F).
The month with the lowest average high temperature is January (37.8°F).

  • Average low temperature in March: 31.2°F

The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (22.2°F).

Average rainfall in March - New Haven, CT
  • Average rainfall in March: 4.3"

Wettest months (with the highest rainfall) are April and September (4.4").
The driest month (with the lowest rainfall) is February (2.9").

Average rainfall days in March - New Haven, CT
  • Average rainfall days in March: 11 days

The month with the highest number of rainy days is December (12 days).
The month with the lowest number of rainy days is October (7 days).

Average sea temperature in March - New Haven, 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 (38.5°F).

Average daylight in March / Average sunshine in March - New Haven, CT
  • Average daylight in March: 12h

The month with the longest days is June (Average daylight: 15.1h).
The month with shortest days is December (Average daylight: 9.2h).

  • Average sunshine in March: 7h

Months with most sunshine are May, June and July (Average sunshine: 9h).
Months with least sunshine are November and December (Average sunshine: 5).

Average UV index in March - New Haven, CT
  • Average UV index in March: 4

Months with the highest UV index are June, July and August (UV index 8).
The month with the lowest UV index is December (UV index 1).