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 minor decrease in the average high-temperature is observed during September, shifting from a moderately hot 76.1°F (24.5°C) in August to an agreeable 69.6°F (20.9°C). During the September nights, an average temperature of 50.2°F (10.1°C) is observed.Humidity
In September, the average relative humidity is 81%.Rainfall
September is the month with the least rainfall. Rain falls for 14.8 days and accumulates 1.65" (42mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
In September, the average length of the day is 12h and 29min.On the first day of the month, sunrise is at 6:37 am and sunset at 7:45 pm. On the last day of September, sunrise is at 7:08 am and sunset at 6:54 pm EDT.
Sunshine
In Swain, the average sunshine in September is 8.2h.UV index
In Swain, the average daily maximum UV index in September is 3. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The maximum UV index, 3 during September, leads to the following recommendations:
Ensure safety - Sun damage prevention is strongly urged. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. Opt for tightly woven and loose clothing to enhance protection from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in September?
What is the average humidity in September?
What is the driest month?
How much does it rain in September?
When it does not snow?
Does it snow in September?
What is the average length of the day in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Swain have in September?
How high is the UV index in September?
Average temperature in September
Swain, NY
- Average high temperature in September: 69.6°F
The warmest month (with the highest average high temperature) is July (77.9°F).
The month with the lowest average high temperature is January (27.9°F).
- Average low temperature in September: 50.2°F
The month with the highest average low temperature is July (57.9°F).
The coldest month (with the lowest average low temperature) is January (16.2°F).
Average pressure in September
Swain, NY
- Average pressure in September: 30.06"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
Swain, NY
- Average wind speed in September: 6.6mph
The windiest month (with the highest average wind speed) is January (10.6mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).
Average humidity in September
Swain, NY
- Average humidity in September: 81%
The months with the highest relative humidity are January and February (87%).
The month with the lowest relative humidity is May (78%).
Average rainfall in September
Swain, NY
- Average rainfall in September: 1.65"
The wettest month (with the highest rainfall) is October (2.87").
The driest month (with the least rainfall) is September (1.65").
Average rainfall days in September
Swain, NY
- Average rainfall days in September: 14.8 days
The month with the highest number of rainy days is July (18.9 days).
The month with the least rainy days is January (5.1 days).
Average snowfall in September
Swain, NY
- Average snowfall in September: 0"
The month with the highest snowfall is February (9.76").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Swain, NY
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (19.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Swain, NY
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in September: 8h and 1min
The month with the most sunshine is July (Average sunshine: 9h and 42min).
The months with the least sunshine are January and February (Average sunshine: 2h and 30min).
Average sunshine days in September
Swain, NY
- Average sunshine days in September: 12.8 days
The month with the most sunshine days is September (12.8 days).
The month with the least sunshine days is February (5.5 days).
Average UV index in September
Swain, 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
Swain, NY
- Average cloud cover in September: 43
The month with the most cloud cover is January (Cloud cover 78).
The month with the least cloud cover is August (Cloud cover 39).
Average visibility in September
Swain, NY
- Average visibility in September: 5mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January and February (4mi).
Swain, New York, USA
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