September weather forecastPort Henry, NY
September
Weather in September
September, the first month of the autumn in Port Henry, is also an agreeable month, with an average temperature fluctuating between 69.6°F (20.9°C) and 48.9°F (9.4°C).Temperature
With the onset of September, Port Henry's climate undergoes a slight change as the average high-temperature moves from a moderately hot 77.5°F (25.3°C) in August to an agreeable 69.6°F (20.9°C). Throughout September, the nighttime temperature averages to a chilly 48.9°F (9.4°C).Humidity
The average relative humidity in September is 78%.Rainfall
September is the month with the least rainfall. Rain falls for 6.5 days and accumulates 0.35" (9mm) of precipitation.Snowfall
In Port Henry, snow does not fall in June through September.Daylight
The average length of the day in September is 12h and 30min.On the first day of September in Port Henry, sunrise is at 6:17 am and sunset at 7:29 pm. On the last day of the month, sunrise is at 6:51 am and sunset at 6:35 pm EDT.
Sunshine
The average sunshine in September is 8.8h.UV index
The average daily maximum UV index in September in Port Henry is 3. A UV Index reading of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for the ordinary person.Note: An average UV index of 3 in September transforms into this advice:
Make use of precautions - Shielding skin and eyes from injury is a requirement. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. During bright days, sunglasses that offer UVA and UVB defense are recommended.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Port Henry, NY
- Average high temperature in September: 69.6°F
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (25.3°F).
- Average low temperature in September: 48.9°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 (12.7°F).
Average pressure in September
Port Henry, NY
- 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
Port Henry, NY
- Average wind speed in September: 5.5mph
The windiest month (with the highest average wind speed) is April (6.8mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).
Average humidity in September
Port Henry, NY
- Average humidity in September: 78%
The months with the highest relative humidity are January and February (86%).
The months with the lowest relative humidity are April and May (75%).
Average rainfall in September
Port Henry, NY
- Average rainfall in September: 0.35"
The wettest month (with the highest rainfall) is June (0.87").
The driest month (with the least rainfall) is September (0.35").
Average rainfall days in September
Port Henry, NY
- Average rainfall days in September: 6.5 days
The month with the highest number of rainy days is July (10.9 days).
The month with the least rainy days is February (3.8 days).
Average snowfall in September
Port Henry, NY
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.36").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Port Henry, NY
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (9.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Port Henry, NY
- Average daylight in September: 12h and 30min
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: 8h and 48min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 3h and 36min).
Average sunshine days in September
Port Henry, NY
- Average sunshine days in September: 22.1 days
The month with the most sunshine days is September (22.1 days).
The month with the least sunshine days is July (17.3 days).
Average UV index in September
Port Henry, NY
- 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
Port Henry, NY
- Average cloud cover in September: 36
The month with the most cloud cover is February (Cloud cover 62).
The months with the least cloud cover are July and August (Cloud cover 34).
Average visibility in September
Port Henry, NY
- Average visibility in September: 5mi
The months with the highest visibility are April and November (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October and December (5mi).
