September weather forecast
Sewanee, TN

Weather in September

September, the first month of the autumn in Sewanee, is also a moderately hot month, with an average temperature varying between 59.9°F (15.5°C) and 80.1°F (26.7°C).

Temperature

In September, the average high-temperature is almost the same as in August - a still moderately hot 80.1°F (26.7°C). In Sewanee, the average low-temperature is 59.9°F (15.5°C).

Humidity

In Sewanee, the average relative humidity in September is 78%.

Rainfall

In Sewanee, it is raining for 15.2 days, with typically 2.99" (76mm) of accumulated precipitation. Throughout the year, there are 191.9 rainfall days, and 48.15" (1223mm) of precipitation is accumulated.

Snowfall

May through September are months without snowfall.

Daylight

In Sewanee, the average length of the day in September is 12h and 23min.
On the first day of the month, sunrise is at 6:16 am and sunset at 7:10 pm. On the last day of September, in Sewanee, Tennessee, sunrise is at 6:37 am and sunset at 6:29 pm CDT.

Sunshine

The average sunshine in September is 8.2h.

UV index

In Sewanee, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for the ordinary person.
Note: In September, the average maximum UV index of 5 translate into the following recommendations:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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.
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FAQ

What is the average humidity in September in Sewanee?

In Sewanee, the average relative humidity in September is 78%.

How much does it rain in Sewanee in September?

In Sewanee, Tennessee, in September, during 15.2 rainfall days, 2.99" (76mm) of precipitation is typically accumulated.

When it does not snow in Sewanee?

May through September are months without snowfall in Sewanee.

Does it snow in Sewanee in September?

In Sewanee, Tennessee, in September, it doesn't snow. In October, it regularly snows.

How many hours of daylight does Sewanee have in September?

In September, the average day length in Sewanee is 12h and 23min.

When is the sunrise / sunset in September in Sewanee?

In September, on the first day of the month, sunrise is at 6:16 am and sunset at 7:10 pm. On the last day of the month, sunrise is at 6:37 am and sunset at 6:29 pm CDT.

How long on average sun shines in September in Sewanee?

The average sunshine duration in September is 8.2h.

What is the UV index intensity in September in Sewanee?

The average daily maximum UV index in September in Sewanee is 5. A UV Index reading of 3 to 5 represents a moderate health threat from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Sewanee, TN

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).

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Average pressure in September
Sewanee, TN

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).

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Average wind speed in September
Sewanee, TN

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).

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Average humidity in September
Sewanee, TN

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%).

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Average rainfall in September
Sewanee, TN

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").

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Average rainfall days in September
Sewanee, TN

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).

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Average snowfall in September
Sewanee, TN

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").

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Average snowfall days in September
Sewanee, TN

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).

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Average daylight in September /
Average sunshine in September
Sewanee, TN

Average daylight in September / Average sunshine in September - Sewanee, TN
  • Average daylight in September: 12h and 23min

The month with the longest days is June (Average daylight: 14h and 29min).
The month with the shortest days is December (Average daylight: 9h and 50min).

  • 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).

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Average sunshine days in September
Sewanee, TN

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).

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Average UV index in September
Sewanee, TN

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).

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Average cloud cover in September
Sewanee, TN

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).

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Average visibility in September
Sewanee, TN

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).

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