August weather forecastNew Haven, CT
August
Weather in August
August follows the trail of July's heated footsteps, but with a slight reduction in temperature. It's a serene time in New Haven when nature comes alive under the warm summer sun. Rainfall is intermittent, just enough to enhance the intense greenery of the city parks. August's weather instigates fun-filled water activities, picnics, and strolls around the city. As the month progresses, there's a subtle hint of approaching fall with evenings gradually becoming cooler.Temperature
As New Haven, Connecticut, welcomes August, the average high-temperature is noted at a still moderately hot 79.7°F (26.5°C), closely aligning with the preceding month. Throughout August, New Haven encounters an average temperature drop to a refreshing 66.9°F (19.4°C).Humidity
In New Haven, the average relative humidity in August is 74%.Rainfall
In New Haven, in August, during 17.1 rainfall days, 3.15" (80mm) of precipitation is typically accumulated. Throughout the year, there are 167.2 rainfall days, and 35.71" (907mm) of precipitation is accumulated.Snowfall
May through October are months without snowfall in New Haven.Ocean temperature
August is the month with the warmest seawater in New Haven, with an average ocean temperature of 73°F (22.8°C).Note: For those with a heightened sensitivity to cold, sunshine, wind, and outside temperature make a big difference in enjoying a swim at 73°F (22.8°C). (Olympic swimming regulations state a water temperature of 77°F (25°C) to 82.4°F (28°C).)
Daylight
In New Haven, the average length of the day in August is 13h and 47min.On the first day of August in New Haven, sunrise is at 5:47 am and sunset at 8:08 pm. On the last day of the month, sunrise is at 6:17 am and sunset at 7:25 pm EDT.
Sunshine
In New Haven, the average sunshine in August is 10.5h.UV index
June through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for the average person.Note: During August, 6 as the daily maximum UV index converts into the following advice:
Beware of overexposure. Fair-skinned individuals risk burning in less than 20 minutes. Between 10 a.m. and 4 p.m., the Sun's UV radiation is at its peak. Limit your exposure to direct sunlight during these hours. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Alert! UV radiation becomes sharper due to reflections from sand and water.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
New Haven, CT
- Average high temperature in August: 79.7°F
The warmest month (with the highest average high temperature) is July (80.4°F).
The month with the lowest average high temperature is January (35.1°F).
- Average low temperature in August: 66.9°F
The month with the highest average low temperature is July (67.6°F).
The coldest month (with the lowest average low temperature) is January (25.5°F).
Average pressure in August
New Haven, CT
- Average pressure in August: 29.98"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 August
New Haven, CT
- Average wind speed in August: 6.8mph
The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest months (with the lowest average wind speed) are July and August (6.8mph).
Average humidity in August
New Haven, CT
- Average humidity in August: 74%
The months with the highest relative humidity are February, May and June (76%).
The months with the lowest relative humidity are April and November (72%).
Average rainfall in August
New Haven, CT
- Average rainfall in August: 3.15"
The wettest month (with the highest rainfall) is December (3.86").
The driest month (with the least rainfall) is September (2.24").
Average rainfall days in August
New Haven, CT
- Average rainfall days in August: 17.1 days
The month with the highest number of rainy days is July (18 days).
The month with the least rainy days is January (9.4 days).
Average snowfall in August
New Haven, CT
- Average snowfall in August: 0"
The month with the highest snowfall is March (2.8").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in August
New Haven, CT
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is February (7.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature in August
New Haven, CT
- Average sea temperature in August: 73°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 August /
Average sunshine in August
New Haven, CT
- Average daylight in August: 13h and 48min
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 August: 10h and 30min
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 August
New Haven, CT
- Average sunshine days in August: 11.3 days
The month with the most sunshine days is November (17.3 days).
The month with the least sunshine days is August (11.3 days).
Average UV index in August
New Haven, CT
- Average UV index in August: 6
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 August
New Haven, CT
- Average cloud cover in August: 29
The months with the most cloud cover are February and December (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in August
New Haven, CT
- Average visibility in August: 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).
