September weather forecast
Petersburg, TN

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Weather in September

The first month of the autumn, September, is still a warm month in Petersburg, Tennessee, with an average temperature ranging between max 81.1°F (27.3°C) and min 61.9°F (16.6°C).

Temperature

Petersburg's weather subtly changes with the onset of September, barely falling from a hot 86.5°F (30.3°C) in August to a moderately hot 81.1°F (27.3°C). Nightly temperatures drop to an average low of 61.9°F (16.6°C) in September.

Heat index

The heat index value for September is appraised at a tropical 86°F (30°C). Exhaustion becomes probable with enduring exposure and activity, potentially causing heat cramps.
Records show heat index calculations are tailored for shaded regions and mild winds. The direct sunshine could escalate the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is an amalgamation of air temperature and humidity to express the equivalent perceived temperature. Elements such as metabolic variations, pregnancy, and physical exertion can influence one's weather perception. Direct sun exposure is noteworthy in its ability to escalate the felt temperature, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are especially vital to children. Children frequently do not understand the need for recuperation and hydration. Thirst, being a late manifestation of dehydration, underlines the need to hydrate frequently, especially when engaging in prolonged physical exercises.

Humidity

The average relative humidity in September is 76%.

Rainfall

The month with the least rainfall is September, when the rain falls for 14.1 days and typically collects 2.24" (57mm) of precipitation.

Snowfall

In Petersburg, 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 September, sunrise is at 6:19 am and sunset at 7:13 pm. On the last day of the month, sunrise is at 6:41 am and sunset at 6:31 pm CDT.

Sunshine

In September, the average sunshine is 8.5h.

UV index

In Petersburg, the average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for the average person.
Note: An average UV index of 5 in September transforms into this advice:
Be careful. Light complexion individuals 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. 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.
Updated: Aug 20, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are September temperatures?

The high-temperature during September is 81.1°F (27.3°C) and the low-temperature is 61.9°F (16.6°C). In September, the average heat index (a.k.a. 'felt air temperature', 'feels like'), which calculates the temperature value influenced by the moisture in the air, is appraised at 86°F (30°C).

What is the average humidity in September?

In Petersburg, the average relative humidity in September is 76%.

What is the driest month?

September is the month with the least rainfall. Rain falls for 14.1 days and accumulates 2.24" (57mm) of precipitation.

How much does it rain in September?

In Petersburg, in September, it is raining for 14.1 days, with typically 2.24" (57mm) of accumulated precipitation.

When it does not snow?

May through October are months without snowfall.

What is the average length of the day in September?

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

What time are sunrise and sunset in September?

On the first day of September, sunrise is at 6:19 am and sunset at 7:13 pm. On the last day of the month, sunrise is at 6:41 am and sunset at 6:31 pm CDT.

How long on average sun shines in September?

In September, the average sunshine duration in Petersburg is 8.5h.

What is the UV index intensity in September?

The average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a moderate health threat 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
Petersburg, TN

Average temperature in September - Petersburg, TN
  • Average high temperature in September: 81.1°F

The warmest month (with the highest average high temperature) is July (87.4°F).
The month with the lowest average high temperature is January (45.7°F).

  • Average low temperature in September: 61.9°F

The month with the highest average low temperature is July (68.4°F).
The coldest month (with the lowest average low temperature) is January (31.3°F).

Average pressure in September
Petersburg, TN

Average pressure in September - Petersburg, 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 (29.97"Hg).

Average wind speed in September
Petersburg, TN

Average wind speed in September - Petersburg, TN
  • Average wind speed in September: 5.1mph

The windiest month (with the highest average wind speed) is February (8.6mph).
The calmest month (with the lowest average wind speed) is July (4.6mph).

Average humidity in September
Petersburg, TN

Average humidity in September - Petersburg, TN
  • Average humidity in September: 76%

The month with the highest relative humidity is December (80%).
The month with the lowest relative humidity is October (74%).

Average rainfall in September
Petersburg, TN

Average rainfall in September - Petersburg, TN
  • Average rainfall in September: 2.24"

The wettest month (with the highest rainfall) is February (4.37").
The driest month (with the least rainfall) is September (2.24").

Average rainfall days in September
Petersburg, TN

Average rainfall days in September - Petersburg, TN
  • Average rainfall days in September: 14.1 days

The month with the highest number of rainy days is July (19.8 days).
The month with the least rainy days is November (9.5 days).

Average snowfall in September
Petersburg, TN

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

The month with the highest snowfall is February (0.98").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in September
Petersburg, TN

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

The month with the highest number of snowfall days is February (2.6 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
Petersburg, TN

Average daylight in September / Average sunshine in September - Petersburg, 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 3min

The month with the most sunshine is June (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).

Average sunshine days in September
Petersburg, TN

Average sunshine days in September - Petersburg, TN
  • Average sunshine days in September: 14.5 days

The month with the most sunshine days is November (18.9 days).
The month with the least sunshine days is July (9.9 days).

Average UV index in September
Petersburg, TN

Average UV index in September - Petersburg, TN
  • Average UV index in September: 5

The months with the highest UV index are May, June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 2).

Average cloud cover in September
Petersburg, TN

Average cloud cover in September - Petersburg, TN
  • Average cloud cover in September: 32

The month with the most cloud cover is February (Cloud cover 53).
The month with the least cloud cover is June (Cloud cover 30).

Average visibility in September
Petersburg, TN

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

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

Petersburg, Tennessee, USA

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