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
September's onset corresponds with a subtle shift in the average high-temperature, slightly moving from a tropical 86.4°F (30.2°C) in August to a warm 80.4°F (26.9°C). Swannsylvania observes a dramatic plunge from daytime highs in September, settling at an average low-temperature of 58.1°F (14.5°C).Humidity
The average relative humidity in September in Swannsylvania is 74%.Rainfall
The month with the least rainfall is September, when the rain falls for 11.2 days and typically collects 1.22" (31mm) of precipitation.Snowfall
May through September are months without snowfall.Daylight
In Swannsylvania, the average length of the day in September is 12h and 23min.On the first day of the month, sunrise is at 7:05 am and sunset at 8:00 pm. On the last day of September, in Swannsylvania, sunrise is at 7:28 am and sunset at 7:17 pm EDT.
Sunshine
In September, the average sunshine is 8.8h.UV index
In September, the average daily maximum UV index in Swannsylvania is 5. A UV Index reading of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the average person.Note: In September, a daily UV index of 5 turns into the following recommendations:
Make use of precautions - Shielding skin and eyes from injury is a requirement. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.
Frequently asked questions
What are September temperatures in Swannsylvania?
What is the average humidity in September in Swannsylvania?
What is the driest month in Swannsylvania?
How much does it rain in Swannsylvania in September?
When it does not snow in Swannsylvania?
Does it snow in Swannsylvania in September?
What is the average length of the day in September in Swannsylvania?
When are sunrise and sunset in September in Swannsylvania?
How many hours of sunshine does Swannsylvania have in September?
What is the UV index reading in September in Swannsylvania?
Average temperature in September
Swannsylvania, TN
- Average high temperature in September: 80.4°F
The warmest month (with the highest average high temperature) is July (87.1°F).
The month with the lowest average high temperature is January (44.2°F).
- Average low temperature in September: 58.1°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (28.6°F).
Average pressure in September
Swannsylvania, TN
- Average pressure in September: 30.05"Hg
The months with the highest atmospheric pressure are January and November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.99"Hg).
Average wind speed in September
Swannsylvania, TN
- Average wind speed in September: 3.9mph
The windiest month (with the highest average wind speed) is April (6.1mph).
The calmest month (with the lowest average wind speed) is August (3.7mph).
Average humidity in September
Swannsylvania, TN
- Average humidity in September: 74%
The month with the highest relative humidity is December (79%).
The month with the lowest relative humidity is August (72%).
Average rainfall in September
Swannsylvania, TN
- Average rainfall in September: 1.22"
The wettest month (with the highest rainfall) is February (2.99").
The driest month (with the least rainfall) is September (1.22").
Average rainfall days in September
Swannsylvania, TN
- Average rainfall days in September: 11.2 days
The months with the highest number of rainy days are May and July (15.3 days).
The month with the least rainy days is November (9.1 days).
Average snowfall in September
Swannsylvania, TN
- Average snowfall in September: 0"
The month with the highest snowfall is January (1.46").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Swannsylvania, TN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (4.8 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
Swannsylvania, 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 48min).
- Average sunshine in September: 8h and 5min
The months with the most sunshine are June and July (Average sunshine: 10h and 54min).
The month with the least sunshine is January (Average sunshine: 5h and 12min).
Average sunshine days in September
Swannsylvania, TN
- Average sunshine days in September: 16.3 days
The month with the most sunshine days is October (19.8 days).
The month with the least sunshine days is July (12.3 days).
Average UV index in September
Swannsylvania, TN
- Average UV index in September: 5
The months with the highest UV index are May, 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
Swannsylvania, TN
- Average cloud cover in September: 28
The month with the most cloud cover is February (Cloud cover 49).
The months with the least cloud cover are June and August (Cloud cover 26).
Average visibility in September
Swannsylvania, TN
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Swannsylvania, Tennessee, USA
Weather forecast for your location
2. Allow the app to use your location
