September weather forecastSewanee, TN
September
Weather in September
Entering September, Sewanee experiences a shift towards cooler weather as autumn approaches. Temperatures begin their descent from the summer highs, yet remain comfortably warm. Sunshine hours also start to take a downturn. A decrease in rainfall quantity is apparent when compared to August. The weather in September stands out due to its lower rainfall of 2.99" (76mm), marking it as the driest month in the year.Temperature
Sewanee sees the arrival of September with an average high-temperature of a still warm 80.1°F (26.7°C), indicating a subtle variation from August. Throughout September, Sewanee records an average temperature of 59.9°F (15.5°C) at night.Humidity
The average relative humidity in September in Sewanee is 78%.Rainfall
In Sewanee, in September, during 15.2 rainfall days, 2.99" (76mm) of precipitation is typically accumulated. Throughout the year, in Sewanee, there are 191.9 rainfall days, and 48.15" (1223mm) of precipitation is accumulated.Snowfall
In Sewanee, Tennessee, snow does not fall in May through September.Daylight
In Sewanee, the average length of the day in September is 12h and 23min.On the first day of September, sunrise is at 6:16 am and sunset at 7:10 pm. On the last day of the month, sunrise is at 6:38 am and sunset at 6:28 pm CDT.
Sunshine
The average sunshine in September is 8.2h.UV index
The average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for average individuals.Note: The maximum daily UV index of 5 in September interprets into the following recommendations:
Take precautions - Protection against sunburn is recommended. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Sewanee, TN
- Average high temperature in September: 80.1°F
The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (44.2°F).
- Average low temperature in September: 59.9°F
The month with the highest average low temperature is July (66.2°F).
The coldest month (with the lowest average low temperature) is January (30°F).
Average pressure in September
Sewanee, TN
- Average pressure in September: 30.03"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).
Average wind speed in September
Sewanee, TN
- Average wind speed in September: 4.3mph
The windiest month (with the highest average wind speed) is February (7mph).
The calmest months (with the lowest average wind speed) are July and August (4mph).
Average humidity in September
Sewanee, TN
- Average humidity in September: 78%
The month with the highest relative humidity is December (81%).
The month with the lowest relative humidity is October (76%).
Average rainfall in September
Sewanee, TN
- Average rainfall in September: 2.99"
The wettest month (with the highest rainfall) is July (5.51").
The driest month (with the least rainfall) is November (2.8").
Average rainfall days in September
Sewanee, TN
- Average rainfall days in September: 15.2 days
The month with the highest number of rainy days is July (22.5 days).
The month with the least rainy days is November (10.4 days).
Average snowfall in September
Sewanee, TN
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.99").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Sewanee, TN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (6.1 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
Sewanee, TN
- 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 18min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days in September
Sewanee, TN
- Average sunshine days in September: 12.4 days
The month with the most sunshine days is November (17.4 days).
The month with the least sunshine days is July (6.3 days).
Average UV index in September
Sewanee, 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
Sewanee, TN
- Average cloud cover in September: 33
The month with the most cloud cover is February (Cloud cover 54).
The months with the least cloud cover are June and September (Cloud cover 33).
Average visibility in September
Sewanee, TN
- Average visibility in September: 5mi
The months with the highest visibility are June and November (6mi).
The months with the lowest visibility are January, February, March, April, May, July, August, September, October and December (5mi).
