Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
September's onset brings a negligible change in high-temperatures, falling from a moderately hot 74.8°F (23.8°C) in August to an agreeable 68.9°F (20.5°C). New Haven records an average nighttime low-temperature of 55.2°F (12.9°C) throughout September.Humidity
With an average relative humidity of 77%, September is the least humid month in New Haven.Rainfall
September is the month with the least rainfall in New Haven. Rain falls for 14.2 days and accumulates 2.36" (60mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
The average length of the day in September is 12h and 29min.On the first day of the month, sunrise is at 6:29 am and sunset at 7:40 pm. On the last day of September, in New Haven, sunrise is at 7:02 am and sunset at 6:47 pm EDT.
Sunshine
In New Haven, New York, the average sunshine in September is 9.2h.UV index
The average daily maximum UV index in September in New Haven, New York, is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for the average person.Note: A maximum high UV index of 4 in September translates into the following recommendations:
Make use of precautions - It is urged to ward off sun damage. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September in New Haven?
What is the least humid month in New Haven?
What is the average humidity in September in New Haven?
What is the driest month in New Haven?
How many days does it rain in September in New Haven?
When it does not snow in New Haven?
Does it snow in New Haven in September?
How many hours of daylight does New Haven have in September?
When is the sunrise / sunset in September in New Haven?
How many hours of sunshine does New Haven have in September?
How high is the UV index in September in New Haven?
Average temperature in September
New Haven, NY
- Average high temperature in September: 68.9°F
The warmest month (with the highest average high temperature) is July (75.2°F).
The month with the lowest average high temperature is January (27.9°F).
- Average low temperature in September: 55.2°F
The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is January (18°F).
Average pressure in September
New Haven, NY
- Average pressure in September: 30.05"Hg
The month with the highest atmospheric pressure is November (30.08"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
New Haven, NY
- Average wind speed in September: 7.9mph
The windiest month (with the highest average wind speed) is January (11.9mph).
The calmest month (with the lowest average wind speed) is July (6.8mph).
Average humidity in September
New Haven, NY
- Average humidity in September: 77%
The months with the highest relative humidity are January and February (86%).
The month with the lowest relative humidity is September (77%).
Average rainfall in September
New Haven, NY
- Average rainfall in September: 2.36"
The wettest month (with the highest rainfall) is October (4.02").
The driest month (with the least rainfall) is September (2.36").
Average rainfall days in September
New Haven, NY
- Average rainfall days in September: 14.2 days
The month with the highest number of rainy days is October (19.1 days).
The month with the least rainy days is February (7.8 days).
Average snowfall in September
New Haven, NY
- Average snowfall in September: 0"
The month with the highest snowfall is January (8.98").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
New Haven, NY
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (18.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
New Haven, NY
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in September: 9h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 2h and 24min).
Average sunshine days in September
New Haven, NY
- Average sunshine days in September: 14 days
The month with the most sunshine days is September (14 days).
The month with the least sunshine days is January (6.3 days).
Average UV index in September
New Haven, NY
- Average UV index in September: 4
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in September
New Haven, NY
- Average cloud cover in September: 33
The month with the most cloud cover is January (Cloud cover 77).
The months with the least cloud cover are July and August (Cloud cover 30).
Average visibility in September
New Haven, NY
- Average visibility in September: 6mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March and December (5mi).
New Haven, New York, USA
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