September weather forecast
Hartford, TN

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Weather in September

September, the first month of the autumn in Hartford, is still a warm month, with an average temperature ranging between min 57.2°F (14°C) and max 79.9°F (26.6°C).

Temperature

September's arrival subtly correlates with a reduction in the average high-temperature, down from a warm 85.3°F (29.6°C) in August to a still moderately hot 79.9°F (26.6°C). Hartford endures a clear shift from daytime heat to a mean low-temperature of 57.2°F (14°C) during September nights.

Humidity

In Hartford, the average relative humidity in September is 74%.

Rainfall

The month with the least rainfall in Hartford is September, when the rain falls for 11.6 days and typically collects 1.42" (36mm) of precipitation.

Snowfall

In Hartford, snow does not fall in May through September.

Daylight

The average length of the day in September is 12h and 23min.
On the first day of September, sunrise is at 7:05 am and sunset at 7:59 pm. On the last day of the month, sunrise is at 7:27 am and sunset at 7:17 pm EDT.

Sunshine

In September, the average sunshine is 8.8h.

UV index

In Hartford, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for the average person.
Note: The UV index of 5 in September translates into these instructions:
Exercise care. People with light skin might get burns in fewer than 30 minutes. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
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Frequently asked questions

What is the average September temperature in Hartford?

September temperatures vary between a high-temperature of 79.9°F (26.6°C) and a low-temperature of 57.2°F (14°C). In August, the average heat index (a.k.a. 'feels like', 'apparent temperature'), which combines air temperature and relative humidity, is appraised at 95°F (35°C).

What is the average humidity in September in Hartford?

The average relative humidity in September in Hartford, Tennessee, is 74%.

What is the driest month in Hartford?

September is the month with the least rainfall in Hartford. Rain falls for 11.6 days and accumulates 1.42" (36mm) of precipitation.

How many days does it rain in September in Hartford?

In Hartford, Tennessee, in September, during 11.6 rainfall days, 1.42" (36mm) of precipitation is typically accumulated.

When it does not snow in Hartford?

May through September are months without snowfall in Hartford.

Does it snow in Hartford in September?

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

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

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

When is the sunrise / sunset in September in Hartford?

On the first day of September in Hartford, Tennessee, sunrise is at 7:05 am and sunset at 7:59 pm. On the last day of the month, sunrise is at 7:27 am and sunset at 7:17 pm EDT.

How long on average sun shines in September in Hartford?

In September, the average sunshine duration in Hartford, Tennessee, is 8.8h.

What is the UV index intensity in September in Hartford?

In Hartford, Tennessee, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes 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
Hartford, TN

Average temperature in September - Hartford, TN
  • Average high temperature in September: 79.9°F

The warmest month (with the highest average high temperature) is July (85.8°F).
The month with the lowest average high temperature is January (44.6°F).

  • Average low temperature in September: 57.2°F

The month with the highest average low temperature is July (63°F).
The coldest month (with the lowest average low temperature) is January (28.6°F).

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Average pressure in September
Hartford, TN

Average pressure in September - Hartford, TN
  • Average pressure in September: 30.05"Hg

The month with the highest atmospheric pressure is November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.99"Hg).

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Average wind speed in September
Hartford, TN

Average wind speed in September - Hartford, 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).

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Average humidity in September
Hartford, TN

Average humidity in September - Hartford, TN
  • Average humidity in September: 74%

The months with the highest relative humidity are February and December (78%).
The months with the lowest relative humidity are July and August (73%).

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Average rainfall in September
Hartford, TN

Average rainfall in September - Hartford, TN
  • Average rainfall in September: 1.42"

The wettest month (with the highest rainfall) is February (2.87").
The driest month (with the least rainfall) is September (1.42").

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Average rainfall days in September
Hartford, TN

Average rainfall days in September - Hartford, TN
  • Average rainfall days in September: 11.6 days

The month with the highest number of rainy days is July (16.3 days).
The month with the least rainy days is November (10 days).

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Average snowfall in September
Hartford, TN

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

The month with the highest snowfall is December (2.48").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in September
Hartford, TN

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

The month with the highest number of snowfall days is January (6.6 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
Hartford, TN

Average daylight in September / Average sunshine in September - Hartford, TN
  • Average daylight in September: 12h and 2min

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 5min

The month with the most sunshine is June (Average sunshine: 10h and 54min).
The month with the least sunshine is January (Average sunshine: 5h and 18min).

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Average sunshine days in September
Hartford, TN

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

The month with the most sunshine days is October (18.4 days).
The month with the least sunshine days is July (12 days).

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Average UV index in September
Hartford, TN

Average UV index in September - Hartford, 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
Hartford, TN

Average cloud cover in September - Hartford, TN
  • Average cloud cover in September: 29

The month with the most cloud cover is February (Cloud cover 48).
The month with the least cloud cover is June (Cloud cover 26).

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Average visibility in September
Hartford, TN

Average visibility in September - Hartford, TN
  • Average visibility in September: 6mi

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

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Hartford, Tennessee, USA

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