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
Roan Mountain's transition from August to September introduces an average high-temperature of a still moderately hot 74.3°F (23.5°C), marking an insignificant variation from the 78.6°F (25.9°C). Throughout September, Roan Mountain's nights cool down to an average of 54°F (12.2°C).Humidity
The average relative humidity in September in Roan Mountain is 79%.Rainfall
The month with the least rainfall in Roan Mountain is September, when the rain falls for 13.7 days and typically collects 1.38" (35mm) of precipitation.Snowfall
June through September are months without snowfall in Roan Mountain.Daylight
The average length of the day in September in Roan Mountain is 12h and 24min.On the first day of the month, sunrise is at 7:00 am and sunset at 7:55 pm. On the last day of September, sunrise is at 7:23 am and sunset at 7:12 pm EDT.
Sunshine
The average sunshine in September in Roan Mountain is 8.3h.UV index
In September, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for average individuals.Note: The daily high UV index of 4 in September translates into this advice:
Prioritize safety - The need to safeguard skin and eyes from harm is emphasized. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.
Frequently asked questions
What is the average September temperature in Roan Mountain?
What is the average humidity in September in Roan Mountain?
What is the driest month in Roan Mountain?
How many days does it rain in September in Roan Mountain?
When it does not snow in Roan Mountain?
Does it snow in Roan Mountain in September?
How many hours of daylight does Roan Mountain have in September?
When is the sunrise / sunset in September in Roan Mountain?
How long on average sun shines in September in Roan Mountain?
What is the UV index intensity in September in Roan Mountain?
Average temperature in September
Roan Mountain, TN
- Average high temperature in September: 74.3°F
The warmest month (with the highest average high temperature) is July (80.1°F).
The month with the lowest average high temperature is January (38.8°F).
- Average low temperature in September: 54°F
The month with the highest average low temperature is July (59.5°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).
Average pressure in September
Roan Mountain, TN
- Average pressure in September: 30.06"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
Roan Mountain, TN
- Average wind speed in September: 4mph
The windiest months (with the highest average wind speed) are January and February (7.1mph).
The calmest month (with the lowest average wind speed) is August (3.6mph).
Average humidity in September
Roan Mountain, TN
- Average humidity in September: 79%
The months with the highest relative humidity are February, March, May and December (80%).
The months with the lowest relative humidity are June and November (77%).
Average rainfall in September
Roan Mountain, TN
- Average rainfall in September: 1.38"
The wettest month (with the highest rainfall) is July (3.07").
The driest month (with the least rainfall) is September (1.38").
Average rainfall days in September
Roan Mountain, TN
- Average rainfall days in September: 13.7 days
The month with the highest number of rainy days is July (20.2 days).
The month with the least rainy days is November (10.6 days).
Average snowfall in September
Roan Mountain, TN
- Average snowfall in September: 0"
The month with the highest snowfall is December (4.65").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Roan Mountain, TN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (12.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Roan Mountain, TN
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in September: 8h and 2min
The months with the most sunshine are June and July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 5h and 12min).
Average sunshine days in September
Roan Mountain, TN
- Average sunshine days in September: 13.2 days
The month with the most sunshine days is November (16.5 days).
The month with the least sunshine days is July (9 days).
Average UV index in September
Roan Mountain, TN
- Average UV index in September: 4
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, February, November and December (UV index 2).
Average cloud cover in September
Roan Mountain, TN
- Average cloud cover in September: 39
The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is June (Cloud cover 35).
Average visibility in September
Roan Mountain, TN
- Average visibility in September: 5mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
Roan Mountain, Tennessee, USA
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