September weather forecast
Riggs Crossroads, TN

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Weather in September

September, the first month of the autumn in Riggs Crossroads, is also a moderately hot month, with an average temperature fluctuating between 81.3°F (27.4°C) and 61.9°F (16.6°C).

Temperature

The arrival of September brings an average high-temperature of a warm 81.3°F (27.4°C), nearly identical to August's 86.5°F (30.3°C). The low-temperature averages to an enjoyable 61.9°F (16.6°C) during the nights of September.

Heat index

The average heat index in September is estimated at a hot 86°F (30°C). Unrelenting activity during exposure could cause fatigue and potentially lead to heat cramps.
Factoring in the heat index, values are geared towards shaded areas with light breezes. With direct sunlight, the heat index could increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', measures the perceived warmth when incorporating the humidity present in the air. The influence of weather is personal, with varied individuals experiencing it differently due to differences in body mass, stature, and physical exertion levels. Being under direct sunshine can magnify the heat experience, possibly pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.

Humidity

The average relative humidity in September is 76%.

Rainfall

In Riggs Crossroads, in September, it is raining for 11.3 days, with typically 0.98" (25mm) of accumulated precipitation. Throughout the year, there are 141.9 rainfall days, and 17.32" (440mm) of precipitation is accumulated.

Snowfall

In Riggs Crossroads, Tennessee, snow does not fall in April through October.

Daylight

In Riggs Crossroads, 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

The average sunshine in September is 8.6h.

UV index

The average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for the average person.
Note: The maximum UV index of 5 during September translates into these guidelines:
Guard yourself - An obligation to protect skin and eyes from harm exists. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.
Updated: Aug 29, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the average September temperature?

September temperatures in Riggs Crossroads vary between a high-temperature of 81.3°F (27.4°C) and a low-temperature of 61.9°F (16.6°C). The average heat index (a.k.a. 'felt air temperature', 'real feel'), which takes the relative humidity and factors it into the air temperature reading, in September is estimated at 86°F (30°C).

What is the average humidity in September?

In September, the average relative humidity is 76%.

How many days does it rain in September?

In Riggs Crossroads, in September, it is raining for 11.3 days, with typically 0.98" (25mm) of accumulated precipitation.

When it does not snow in Riggs Crossroads?

In Riggs Crossroads, snow does not fall in April through October.

What is the average length of the day in September?

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

When are sunrise and sunset in September in Riggs Crossroads?

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 many hours of sunshine does Riggs Crossroads have in September?

In Riggs Crossroads, the average sunshine duration in September is 8.6h.

What is the UV index reading in September?

In September, the average daily maximum UV index in Riggs Crossroads is 5. A UV Index value of 3 to 5 symbolizes a moderate health threat from unsafe 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
Riggs Crossroads, TN

Average temperature in September - Riggs Crossroads, TN
  • Average high temperature in September: 81.3°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 (45.3°F).

  • Average low temperature in September: 61.9°F

The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (30.9°F).

Average pressure in September
Riggs Crossroads, TN

Average pressure in September - Riggs Crossroads, 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
Riggs Crossroads, TN

Average wind speed in September - Riggs Crossroads, TN
  • Average wind speed in September: 5mph

The windiest month (with the highest average wind speed) is February (8.4mph).
The calmest months (with the lowest average wind speed) are July and August (4.6mph).

Average humidity in September
Riggs Crossroads, TN

Average humidity in September - Riggs Crossroads, 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
Riggs Crossroads, TN

Average rainfall in September - Riggs Crossroads, TN
  • Average rainfall in September: 0.98"

The wettest month (with the highest rainfall) is July (2.17").
The driest month (with the least rainfall) is November (0.94").

Average rainfall days in September
Riggs Crossroads, TN

Average rainfall days in September - Riggs Crossroads, TN
  • Average rainfall days in September: 11.3 days

The month with the highest number of rainy days is July (17.9 days).
The month with the least rainy days is November (7.2 days).

Average snowfall in September
Riggs Crossroads, TN

Average snowfall in September - Riggs Crossroads, TN
  • Average snowfall in September: 0"

The months with the highest snowfall are February and December (0.2").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in September
Riggs Crossroads, TN

Average snowfall days in September - Riggs Crossroads, TN
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (2.1 days).
The months with the least snowfall days are April, May, June, July, August and September (0 days).

Average daylight in September /
Average sunshine in September
Riggs Crossroads, TN

Average daylight in September / Average sunshine in September - Riggs Crossroads, 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 4min

The month with the most sunshine is June (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).

Average sunshine days in September
Riggs Crossroads, TN

Average sunshine days in September - Riggs Crossroads, TN
  • Average sunshine days in September: 16.9 days

The month with the most sunshine days is November (21.3 days).
The month with the least sunshine days is July (11.3 days).

Average UV index in September
Riggs Crossroads, TN

Average UV index in September - Riggs Crossroads, 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
Riggs Crossroads, TN

Average cloud cover in September - Riggs Crossroads, TN
  • Average cloud cover in September: 31

The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is June (Cloud cover 29).

Average visibility in September
Riggs Crossroads, TN

Average visibility in September - Riggs Crossroads, TN
  • Average visibility in September: 6mi

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

Riggs Crossroads, Tennessee, USA

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