Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
Chattanooga in September undergoes a slight reduction in the average high-temperature, shifting from August's hot 87.3°F (30.7°C) to a warm 81.9°F (27.7°C). In September, the average low-temperature records at a refreshing 61.2°F (16.2°C) during the nights.Heat index
The average heat index in September is computed to be a hot 87.8°F (31°C). With unrelenting exposure and activity, one might experience exhaustion, leading to potential heat cramps.Evaluating the heat index requires understanding its values in the shade and with gentle winds. The direct sunshine could escalate the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', offers an insight into how hot it feels when we factor in moisture content. Physical activity, clothing, and metabolic variations are additional factors that impact an individual's perception of temperature. One's exposure to direct sunlight has the potential to intensify the heat sensation, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Young ones often do not realize the necessity to rest and replenish their fluids. Thirst is a delayed indication of dehydration - keeping hydrated, particularly in prolonged physical activity, is crucial.
Humidity
In September, the average relative humidity in Chattanooga is 76%.Rainfall
September is the month with the least rainfall. Rain falls for 12.5 days and accumulates 2.56" (65mm) of precipitation.Snowfall
In Chattanooga, snow does not fall in May through October.Daylight
In Chattanooga, Tennessee, the average length of the day in September is 12h and 23min.On the first day of the month, sunrise is at 7:14 am and sunset at 8:07 pm. On the last day of September, in Chattanooga, sunrise is at 7:35 am and sunset at 7:26 pm EDT.
Sunshine
In Chattanooga, the average sunshine in September is 8.3h.UV index
The average daily maximum UV index in September in Chattanooga, Tennessee, is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum UV index of 5 during September translates into these guidelines:
Heed the precautions - Protecting the skin and eyes from damage is compulsory. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. To cut down UV radiation exposure by about half, sport a wide-brim hat.
Frequently asked questions
What is the average September temperature in Chattanooga?
What is the average humidity in September in Chattanooga?
What is the driest month in Chattanooga?
How much does it rain in Chattanooga in September?
When it does not snow in Chattanooga?
How many hours of daylight does Chattanooga have in September?
When is the sunrise / sunset in September in Chattanooga?
How long on average sun shines in September in Chattanooga?
How high is the UV index in September in Chattanooga?
Average temperature in September
Chattanooga, TN
- Average high temperature in September: 81.9°F
The warmest month (with the highest average high temperature) is July (88°F).
The month with the lowest average high temperature is January (46°F).
- Average low temperature in September: 61.2°F
The month with the highest average low temperature is July (67.1°F).
The coldest month (with the lowest average low temperature) is January (30.7°F).
Average pressure in September
Chattanooga, 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 (29.98"Hg).
Average wind speed in September
Chattanooga, TN
- Average wind speed in September: 4.1mph
The windiest month (with the highest average wind speed) is February (6.4mph).
The calmest month (with the lowest average wind speed) is August (3.8mph).
Average humidity in September
Chattanooga, TN
- Average humidity in September: 76%
The month with the highest relative humidity is December (80%).
The months with the lowest relative humidity are June, July, August, October and November (75%).
Average rainfall in September
Chattanooga, TN
- Average rainfall in September: 2.56"
The wettest month (with the highest rainfall) is December (4.37").
The driest month (with the least rainfall) is September (2.56").
Average rainfall days in September
Chattanooga, TN
- Average rainfall days in September: 12.5 days
The month with the highest number of rainy days is July (19.6 days).
The month with the least rainy days is November (9.8 days).
Average snowfall in September
Chattanooga, TN
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.85").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Chattanooga, TN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (4.1 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Chattanooga, 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 2min
The month with the most sunshine is June (Average sunshine: 10h and 18min).
The month with the least sunshine is December (Average sunshine: 4h and 54min).
Average sunshine days in September
Chattanooga, TN
- Average sunshine days in September: 15.9 days
The month with the most sunshine days is October (18.9 days).
The month with the least sunshine days is July (9.4 days).
Average UV index in September
Chattanooga, 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 and December (UV index 2).
Average cloud cover in September
Chattanooga, TN
- Average cloud cover in September: 33
The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is June (Cloud cover 31).
Average visibility in September
Chattanooga, 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).
Chattanooga, Tennessee, USA
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