September weather forecast
Harriman, TN

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Weather in September

The first month of the autumn, September, is also a moderately hot month in Harriman, Tennessee, with an average temperature ranging between min 59°F (15°C) and max 80.2°F (26.8°C).

Temperature

September indicates a minor shift in the average high-temperature, from August's 85.8°F (29.9°C) to a still warm 80.2°F (26.8°C). Throughout September, the average low-temperature in Harriman dips to a moderate 59°F (15°C).

Humidity

In September, the average relative humidity is 77%.

Rainfall

The month with the least rainfall is September, when the rain falls for 12.6 days and typically collects 1.97" (50mm) of precipitation.

Snowfall

May through October are months without snowfall.

Daylight

In September, the average length of the day in Harriman is 12h and 23min.
On the first day of September in Harriman, sunrise is at 7:10 am and sunset at 8:05 pm. On the last day of the month, sunrise is at 7:33 am and sunset at 7:22 pm EDT.

Sunshine

In September, the average sunshine is 8.4h.

UV index

In Harriman, Tennessee, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for the average person.
Note: In September, the maximum UV index of 5 suggests this advice:
Undertake protective steps - Preventing sun damage is advised. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. 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.
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Frequently asked questions

What are September temperatures in Harriman?

In September, in Harriman, the average high-temperature is 80.2°F (26.8°C), and the average low-temperature is 59°F (15°C). The average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which combines relative humidity and air temperature, in August is appraised at 96.8°F (36°C).

What is the average humidity in September in Harriman?

In Harriman, the average relative humidity in September is 77%.

What is the driest month in Harriman?

September is the month with the least rainfall in Harriman, Tennessee. Rain falls for 12.6 days and accumulates 1.97" (50mm) of precipitation.

How many days does it rain in September in Harriman?

In September, in Harriman, Tennessee, the rain falls for 12.6 days. Throughout September, 1.97" (50mm) of precipitation is accumulated.

When it does not snow in Harriman?

May through October are months without snowfall in Harriman.

What is the average length of the day in September in Harriman?

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

What time are sunrise and sunset in September in Harriman?

In September, on the first day of the month, sunrise is at 7:10 am and sunset at 8:05 pm. On the last day of the month, in Harriman, sunrise is at 7:33 am and sunset at 7:22 pm EDT.

How many hours of sunshine does Harriman have in September?

In Harriman, the average sunshine duration in September is 8.4h.

What is the UV index reading in September in Harriman?

In September, the average daily maximum UV index in Harriman is 5. A UV Index reading of 3 to 5 represents a moderate vulnerability from unprotected exposure to UV radiation.
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
Harriman, TN

Average temperature in September - Harriman, TN
  • Average high temperature in September: 80.2°F

The warmest month (with the highest average high temperature) is July (86.5°F).
The month with the lowest average high temperature is January (44.1°F).

  • Average low temperature in September: 59°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 (29.1°F).

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Average pressure in September
Harriman, TN

Average pressure in September - Harriman, 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).

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Average wind speed in September
Harriman, TN

Average wind speed in September - Harriman, TN
  • Average wind speed in September: 3.9mph

The windiest month (with the highest average wind speed) is April (6.3mph).
The calmest month (with the lowest average wind speed) is August (3.7mph).

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Average humidity in September
Harriman, TN

Average humidity in September - Harriman, TN
  • Average humidity in September: 77%

The month with the highest relative humidity is December (80%).
The months with the lowest relative humidity are June, August, October and November (76%).

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Average rainfall in September
Harriman, TN

Average rainfall in September - Harriman, TN
  • Average rainfall in September: 1.97"

The wettest month (with the highest rainfall) is July (4.09").
The driest month (with the least rainfall) is September (1.97").

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Average rainfall days in September
Harriman, TN

Average rainfall days in September - Harriman, TN
  • Average rainfall days in September: 12.6 days

The month with the highest number of rainy days is July (18.8 days).
The month with the least rainy days is November (8.9 days).

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Average snowfall in September
Harriman, TN

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

The month with the highest snowfall is February (1.06").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in September
Harriman, TN

Average snowfall days in September - Harriman, 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).

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

Average daylight in September / Average sunshine in September - Harriman, 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 2min

The month with the most sunshine is June (Average sunshine: 10h and 18min).
The months with the least sunshine are January and December (Average sunshine: 4h and 48min).

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Average sunshine days in September
Harriman, TN

Average sunshine days in September - Harriman, TN
  • Average sunshine days in September: 15.1 days

The month with the most sunshine days is November (19.3 days).
The month with the least sunshine days is July (10.7 days).

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Average UV index in September
Harriman, TN

Average UV index in September - Harriman, 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
Harriman, TN

Average cloud cover in September - Harriman, TN
  • Average cloud cover in September: 33

The month with the most cloud cover is February (Cloud cover 54).
The month with the least cloud cover is June (Cloud cover 31).

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Average visibility in September
Harriman, TN

Average visibility in September - Harriman, TN
  • Average visibility in September: 5mi

The months with the highest visibility are June, October and November (6mi).
The months with the lowest visibility are January, February, March, April, May, July, August, September and December (5mi).

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Harriman, Tennessee, USA

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