September weather forecastPortageville, NY
September
Weather in September
The first month of the autumn, September, is still a pleasant month in Portageville, New York, with an average temperature fluctuating between 70.2°F (21.2°C) and 50.9°F (10.5°C).Temperature
Portageville's transition into September involves a gentle shift in temperature, receding from a warm 76.6°F (24.8°C) in August to an agreeable 70.2°F (21.2°C). Nighttime temperatures in September average to a cool 50.9°F (10.5°C).Humidity
The average relative humidity in September is 80%.Rainfall
September is the month with the least rainfall. Rain falls for 13.9 days and accumulates 1.42" (36mm) of precipitation.Snowfall
June through September are months without snowfall in Portageville.Daylight
In September, the average length of the day is 12h and 29min.On the first day of September, sunrise is at 6:37 am and sunset at 7:45 pm. On the last day of the month, sunrise is at 7:09 am and sunset at 6:54 pm EDT.
Sunshine
The average sunshine in September is 8.6h.UV index
In September, the average daily maximum UV index is 3. A UV Index estimate of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for the average person.Note: The maximum daily UV index of 3 in September interprets into the following recommendations:
Adopt protective measures - It is advised to guard against sun damage. It's recommended to limit sun exposure when its radiation is at its peak during midday. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Portageville, NY
- Average high temperature in September: 70.2°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 (28.2°F).
- Average low temperature in September: 50.9°F
The month with the highest average low temperature is July (58.1°F).
The coldest month (with the lowest average low temperature) is January (16.5°F).
Average pressure in September
Portageville, NY
- Average pressure in September: 30.05"Hg
The month with the highest atmospheric pressure is November (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Portageville, NY
- Average wind speed in September: 6.5mph
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 (6.3mph).
Average humidity in September
Portageville, NY
- Average humidity in September: 80%
The month with the highest relative humidity is February (87%).
The month with the lowest relative humidity is May (77%).
Average rainfall in September
Portageville, NY
- Average rainfall in September: 1.42"
The wettest month (with the highest rainfall) is October (2.64").
The driest month (with the least rainfall) is September (1.42").
Average rainfall days in September
Portageville, NY
- Average rainfall days in September: 13.9 days
The month with the highest number of rainy days is May (17.9 days).
The month with the least rainy days is February (7 days).
Average snowfall in September
Portageville, NY
- Average snowfall in September: 0"
The month with the highest snowfall is February (7.13").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Portageville, NY
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (19 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Portageville, NY
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in September: 8h and 36min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 2h and 42min).
Average sunshine days in September
Portageville, NY
- Average sunshine days in September: 14.1 days
The month with the most sunshine days is September (14.1 days).
The month with the least sunshine days is February (6.4 days).
Average UV index in September
Portageville, 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
Portageville, NY
- Average cloud cover in September: 39
The month with the most cloud cover is January (Cloud cover 75).
The month with the least cloud cover is August (Cloud cover 35).
Average visibility in September
Portageville, NY
- Average visibility in September: 5mi
The months with the highest visibility are April, May and June (6mi).
The month with the lowest visibility is January (4mi).
