September weather forecastAsheville, NC
September
Weather in September
September signals the arrival of fall in Asheville with dropping temperatures and decreasing daylight hours. While the daylight duration dips to 12.4 hours, the fall season provides scenic beauty as the leaves start transforming into vibrant shades of orange and red. In a gradual transition from the heat of summer, the pleasing weather conditions in September make it an ideal month for hiking or apple picking. As the mountainsides start showing off their fall colours, Asheville takes on a distinct golden hue. September’s blend of warm days and cool nights primes the city for yet another spectacular season change.Temperature
Asheville commences September with an average high-temperature of a still moderately hot 77.7°F (25.4°C), maintaining a close resemblance to the previous month. September nights in Asheville present a sharp contrast to daytime highs, with average temperatures of 55.9°F (13.3°C).Humidity
The average relative humidity in September in Asheville is 77%.Rainfall
June and September are months with the least rain when the rain falls for 12.5 days and typically aggregates up to 1.73" (44mm) of rain.Snowfall
May through October are months without snowfall in Asheville.Daylight
The average length of the day in September is 12h and 23min.On the first day of September, sunrise is at 7:02 am and sunset at 7:57 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 7:14 pm EDT.
Sunshine
The average sunshine in September in Asheville is 8.2h.UV index
In Asheville, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: The UV index of 4 in September translates into these instructions:
Preventative actions are necessary - The mandate to avoid skin and eye damage is in place. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. 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
Average temperature in September
Asheville, NC
- Average high temperature in September: 77.7°F
The warmest month (with the highest average high temperature) is July (84°F).
The month with the lowest average high temperature is January (44.1°F).
- Average low temperature in September: 55.9°F
The month with the highest average low temperature is July (62.1°F).
The coldest month (with the lowest average low temperature) is January (27.7°F).
Average pressure in September
Asheville, NC
- Average pressure in September: 30.05"Hg
The month with the highest atmospheric pressure is November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.99"Hg).
Average wind speed in September
Asheville, NC
- Average wind speed in September: 4mph
The windiest months (with the highest average wind speed) are January and April (6.4mph).
The calmest month (with the lowest average wind speed) is August (3.5mph).
Average humidity in September
Asheville, NC
- Average humidity in September: 77%
The month with the highest relative humidity is May (78%).
The month with the lowest relative humidity is November (73%).
Average rainfall in September
Asheville, NC
- Average rainfall in September: 1.73"
The wettest month (with the highest rainfall) is December (3.54").
The driest months (with the least rainfall) are June and September (1.73").
Average rainfall days in September
Asheville, NC
- Average rainfall days in September: 12.5 days
The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is November (9.1 days).
Average snowfall in September
Asheville, NC
- Average snowfall in September: 0"
The month with the highest snowfall is December (4.21").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Asheville, NC
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (4.1 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Asheville, NC
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in September: 8h and 12min
The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 5h and 30min).
Average sunshine days in September
Asheville, NC
- Average sunshine days in September: 16.2 days
The month with the most sunshine days is October (20.2 days).
The month with the least sunshine days is May (11.6 days).
Average UV index in September
Asheville, NC
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover in September
Asheville, NC
- Average cloud cover in September: 37
The month with the most cloud cover is March (Cloud cover 44).
The month with the least cloud cover is June (Cloud cover 31).
Average visibility in September
Asheville, NC
- Average visibility in September: 5mi
The months with the highest visibility are February, June, July and November (6mi).
The months with the lowest visibility are January, March, April, May, August, September, October and December (5mi).
