September weather forecast
Crossville, TN

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Weather in September

Coming into September, Crossville experiences a drop in temperatures signifying the onset of fall. The weather becomes slightly cooler, providing respite from the heat of August. Average high and low temperatures stay at 77.9°F (25.5°C) and 58.3°F (14.6°C) respectively, maintaining moderately warm days and cold nights. The month is characterized by colorful fall foliage, thus providing numerous opportunities for nature walks and photo shoots. September, with its favorable weather, is undoubtedly a refreshing month to be in Crossville.

Temperature

With the onset of September, the average high-temperature subtly recedes from August's 83.5°F (28.6°C) to a still moderately hot 77.9°F (25.5°C). Throughout the month of September, Crossville sees a steady low-temperature average of 58.3°F (14.6°C).

Humidity

In September, the average relative humidity is 79%.

Rainfall

In Crossville, during September, the rain falls for 16.2 days and regularly aggregates up to 3.43" (87mm) of precipitation. In Crossville, during the entire year, the rain falls for 198.6 days and collects up to 51.73" (1314mm) of precipitation.

Snowfall

In Crossville, snow does not fall in May through October.

Daylight

The average length of the day in September is 12h and 23min.
On the first day of the month, sunrise is at 6:12 am and sunset at 7:07 pm. On the last day of September, in Crossville, sunrise is at 6:34 am and sunset at 6:24 pm CDT.

Sunshine

In Crossville, the average sunshine in September is 7.8h.

UV index

In September, the average daily maximum UV index in Crossville is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for the average person.
Note: The daily maximum UV index of 4 in September interprets into the following advice:
Undertake precautions - Guarding against sun damage is counselled. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure.

Frequently asked questions

What are the temperatures in September?

In September, in Crossville, the average high-temperature is 77.9°F (25.5°C), and the average low-temperature is 58.3°F (14.6°C). The average heat index (a.k.a. 'apparent temperature', 'real feel'), which takes the relative humidity and factors it into the air temperature reading, in August is calculated to be 91.4°F (33°C).

What is the average humidity in September?

In September, the average relative humidity is 79%.

How much does it rain in September?

In Crossville, in September, during 16.2 rainfall days, 3.43" (87mm) of precipitation is typically accumulated.

When it does not snow?

May through October are months without snowfall.

How many hours of daylight does Crossville have in September?

The average day length in September in Crossville, Tennessee, is 12h and 23min.

When is the sunrise / sunset in September?

In September, on the first day of the month, sunrise is at 6:12 am and sunset at 7:07 pm. On the last day of the month, sunrise is at 6:34 am and sunset at 6:24 pm CDT.

How long on average sun shines in September?

The average sunshine duration in September is 7.8h.

What is the UV index reading in September?

The average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a moderate health threat from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Crossville, TN

Average temperature in September - Crossville, TN
  • Average high temperature in September: 77.9°F

The warmest month (with the highest average high temperature) is July (84.2°F).
The month with the lowest average high temperature is January (42.4°F).

  • Average low temperature in September: 58.3°F

The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (28°F).

Average pressure in September
Crossville, TN

Average pressure in September - Crossville, TN
  • Average pressure in September: 30.03"Hg

The months with the highest atmospheric pressure are January and November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).

Average wind speed in September
Crossville, TN

Average wind speed in September - Crossville, TN
  • Average wind speed in September: 4.4mph

The windiest month (with the highest average wind speed) is February (7.6mph).
The calmest months (with the lowest average wind speed) are July and August (4.2mph).

Average humidity in September
Crossville, TN

Average humidity in September - Crossville, TN
  • Average humidity in September: 79%

The months with the highest relative humidity are February, March and December (81%).
The month with the lowest relative humidity is November (77%).

Average rainfall in September
Crossville, TN

Average rainfall in September - Crossville, TN
  • Average rainfall in September: 3.43"

The wettest month (with the highest rainfall) is July (5.51").
The driest month (with the least rainfall) is November (3.15").

Average rainfall days in September
Crossville, TN

Average rainfall days in September - Crossville, TN
  • Average rainfall days in September: 16.2 days

The month with the highest number of rainy days is July (21.8 days).
The month with the least rainy days is November (11.2 days).

Average snowfall in September
Crossville, TN

Average snowfall in September - Crossville, TN
  • Average snowfall in September: 0"

The month with the highest snowfall is February (2.91").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in September
Crossville, TN

Average snowfall days in September - Crossville, TN
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (8.5 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
Crossville, TN

Average daylight in September / Average sunshine in September - Crossville, 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: 7h and 5min

The month with the most sunshine is June (Average sunshine: 10h and 0min).
The month with the least sunshine is February (Average sunshine: 4h and 6min).

Average sunshine days in September
Crossville, TN

Average sunshine days in September - Crossville, TN
  • Average sunshine days in September: 11.6 days

The month with the most sunshine days is October (16.2 days).
The months with the least sunshine days are June and July (7.8 days).

Average UV index in September
Crossville, TN

Average UV index in September - Crossville, TN
  • Average UV index in September: 4

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
Crossville, TN

Average cloud cover in September - Crossville, TN
  • Average cloud cover in September: 37

The month with the most cloud cover is February (Cloud cover 57).
The month with the least cloud cover is June (Cloud cover 35).

Average visibility in September
Crossville, TN

Average visibility in September - Crossville, 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).

Crossville, Tennessee, USA

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