Measurements:
°C
°F
New Haven
12°F
S 9 mph
Feels like: 4°F
Precip: 0%
World Resorts USA New Haven Weather May Weather in New Haven

New Haven Weather: May

Average Day Temperature: 64.4°F
Average Night Temperature: 53.3°F
Sea Water Temperature: 55.0°F
Number of Sunny Days: 11 days
Sunshine Hours: 14.0 - 14.9 hours
Number of Rainy Days: 2 days
Precipitation Totals: 1.1 in

Air Temperature in May, °F

Select Year: 2025 2024 2023

The highest day temperature in May 2025 was 75°F. The lowest night temperature was 43°F. The average values for day and night temperatures during May were 65.8°F и 54.0°F respectivly.

New Haven Water Sea Temperature in May, °F

Select Year: 2025 2024 2023

The average sea surface temperature in May 2025 for New Haven was 55.1°F. The maximum and minimum values were 51.8°F and 58.8°F respectively.

Sunny, Cloudy and Gloomy days

Most of the days in May are gloomy but you can also expect sunny days.

Precipitation Totals in May, in

Precipitation total in May for New Haven is 1.1 in. It makes may one of the least rainy months of the year.

Wind Speed in May, mph

The average wind speed in May is 8.3 mph.

Average Sunny Hours Per Day

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for New Haven in May is 7.4 hours.

Best Time to Visit New Haven
The most sunny months:
November 16 days
September 14 days
October 13 days
The most warm months:
July 84.0 °F
August 81.9 °F
June 76.4 °F
Warmest sea temperature:
August 77.0 °F
July 75.7 °F
September 73.8 °F
The most cold months:
January 34.8 °F
February 35.8 °F
December 40.4 °F
The most rainy months:
July 3 days
August 3 days
April 3 days
The most windy months:
January 10 mph
November 10 mph
December 10 mph

New Haven on the Weather Map

USA Resorts:
NAME
Chicago 0
Hawaii +78
Honolulu +78
Houston +46
Las Vegas +40
Los Angeles +52
Maui +72
Miami +72
Miami Beach +80
New York +18
San Diego +54
San Francisco +46
Sarasota +62
Tampa +62
Washington +28
24 Hours Weather Forecast
New Haven
Local time: 01:42
05 dec, friday
0300 12°F
S
9 mph
0600 10°F
S
6 mph
0900 14°F
SE
2 mph
1200 24°F
N
6 mph
1500 24°F
NE
6 mph
1800 26°F
N
3 mph
2100 26°F
NE
4 mph
06 dec, saturday
0000 26°F
N
2 mph