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
A mild drop in New Haven's average high-temperature is observed in September, transitioning from a moderately hot 76.6°F (24.8°C) in August to an agreeable 68.5°F (20.3°C). Nighttime temperature dips to a mean of 48.6°F (9.2°C) during September.Humidity
In September, the average relative humidity is 80%.Rainfall
September is the month with the least rainfall. Rain falls for 12.3 days and accumulates 1.85" (47mm) of precipitation.Snowfall
In New Haven, snow does not fall in June through September.Daylight
In September, the average length of the day is 12h and 30min.On the first day of September, sunrise is at 6:16 am and sunset at 7:28 pm. On the last day of the month, sunrise is at 6:49 am and sunset at 6:34 pm EDT.
Sunshine
In September, the average sunshine is 8.4h.UV index
In September, the average daily maximum UV index is 3. A UV Index reading of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the average person.Note: In September, a regular UV index of 3 translates into these guidelines:
Guard yourself - Precautionary measures against sun damage are advocated. The solar radiation around mid-day is intense; avoid the Sun and stay safe. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for New Haven in September?
What is the average humidity in September in New Haven?
What is the driest month?
How much does it rain in September?
When it does not snow?
Does it snow 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?
What is the UV index intensity in September?
Average temperature in September
New Haven, VT
- Average high temperature in September: 68.5°F
The warmest month (with the highest average high temperature) is July (78.4°F).
The month with the lowest average high temperature is January (24.1°F).
- Average low temperature in September: 48.6°F
The month with the highest average low temperature is July (56.8°F).
The coldest month (with the lowest average low temperature) is January (11.7°F).
Average pressure in September
New Haven, VT
- Average pressure in September: 30.05"Hg
The month with the highest atmospheric pressure is November (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
New Haven, VT
- Average wind speed in September: 5.7mph
The windiest month (with the highest average wind speed) is April (7.3mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in September
New Haven, VT
- Average humidity in September: 80%
The month with the highest relative humidity is February (88%).
The months with the lowest relative humidity are April and May (76%).
Average rainfall in September
New Haven, VT
- Average rainfall in September: 1.85"
The wettest month (with the highest rainfall) is June (3.39").
The driest month (with the least rainfall) is September (1.85").
Average rainfall days in September
New Haven, VT
- Average rainfall days in September: 12.3 days
The month with the highest number of rainy days is June (19.2 days).
The month with the least rainy days is January (8.7 days).
Average snowfall in September
New Haven, VT
- Average snowfall in September: 0"
The month with the highest snowfall is February (11.06").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
New Haven, VT
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (21.3 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, VT
- 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: 8h and 54min).
- Average sunshine in September: 8h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is February (Average sunshine: 3h and 0min).
Average sunshine days in September
New Haven, VT
- Average sunshine days in September: 14.6 days
The month with the most sunshine days is September (14.6 days).
The month with the least sunshine days is February (5.7 days).
Average UV index in September
New Haven, VT
- Average UV index in September: 3
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in September
New Haven, VT
- Average cloud cover in September: 39
The month with the most cloud cover is February (Cloud cover 70).
The month with the least cloud cover is July (Cloud cover 36).
Average visibility in September
New Haven, VT
- Average visibility in September: 5mi
The months with the highest visibility are April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January, February and March (4mi).
New Haven, Vermont, USA
Weather forecast for your location
2. Allow the app to use your location