Great Smoky Mountains weather in September 2025
Great Smoky Mountains weather in September 2025
Day
25 °C
Night
12 °C
Precipitation
107 mm
in month
Rainy days
9 days
in month
Daylight
12 hours
average
Sunshine
7 hours
average
Humidity
79 %
Day
25 °C
Night
12 °C
Precipitation
107 mm
in month
Rainy days
9 days
in month
Daylight
12 hours
average
Sunshine
7 hours
average
Humidity
79 %
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Weather overview and FAQs
Weather overview
In Great Smoky Mountains in September, the average air temperature ranges from 25 °C (77 °F) during the day to 12 °C (54 °F) at night. There are 9 days of rain on average, where the rainfall is 107 mm (4.21 in).
Are there good conditions to visit in Great Smoky Mountains in September?
There are good conditions for visiting in Great Smoky Mountains in September. The daily temperatures in this month reach pleasant 25 °C (77 °F). There are only 9 days of rain in the whole month, so you can leave your umbrella at home. The temperature of 12 °C (54 °F) at night may make it better to dine inside or to put on more clothes for a dinner outside.
What is the temperature in Great Smoky Mountains during the day in September?
The average daily temperature in Great Smoky Mountains in September is 25 °C (77 °F). A comfortable temperature for most people, where it is neither too cold nor too hot, and a large number of activities can be carried out comfortably, including sunbathing by the water. Lighter clothing will be suitable - shorts, skirts, t-shirts, jackets; a light sweater and long trousers may also be useful.
What is the air temperature in Great Smoky Mountains in September at night?
The average night temperature in September in Great Smoky Mountains is 12 °C (54 °F). Nights can be cooler, morning running can be refreshing but choose appropriate clothing, evening outdoor sitting can be pleasant but you can also be cold.
How many days of precipitation on average can I expect in September in Great Smoky Mountains?
In September in Great Smoky Mountains, we can expect 9 days to be rainy, that is, days when precipitation exceeds 2 mm (0.08 in). Converted to days of the week, this means that it will occur on an average of 2.2 days of the week, or in general - 31 % days.
Is Great Smoky Mountains rainier in September than in October?
Yes, Great Smoky Mountains is a rainier September than in October.
How heavy is the precipitation in September in Great Smoky Mountains?
There is precipitation of 107 mm (4.21 in) in September in Great Smoky Mountains, which means 4 mm (0.14 in) rainfall per day on average.
How windy is Great Smoky Mountains in September?
In September in Great Smoky Mountains, there will be an average wind scale of 2. It is rather a milder or unnoticeable wind, therefore it will not bother you during your holiday.
What is the humidity in September in Great Smoky Mountains?
In Great Smoky Mountains in September, expect humidity around 79 %. This humidity is rather above average, but except for sensitive individuals, it should not be a problem.
Is the weather in Great Smoky Mountains warmer in September than in August?
No, September is not warmer in Great Smoky Mountains than August.
How many sunny hours can I expect in Great Smoky Mountains in September?
In Great Smoky Mountains in September, you can expect around 7 hours of sunshine.
How long is the day (from dawn till dusk) in Great Smoky Mountains in September?
The length of daylight in Great Smoky Mountains in September is 12 hours.
Is the temperature rising or falling in the course of time in Great Smoky Mountains in September?
During September in Great Smoky Mountains, the day temperatures are decreasing - from 26 °C (79 °F) at the beginning of the month to 22 °C (72 °F) at the end of the month.