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
Start of September brings a shift in the average high-temperature, falling from August's sweltering 95.5°F (35.3°C) to a hot 86.4°F (30.2°C). Throughout the month of September, Chattanooga witnesses an average temperature of 67.3°F (19.6°C).Heat index
In September, the average heat index is calculated to be a tropical 91.4°F (33°C). Adopt extra preventive measures, the occurrence of heat cramps and heat exhaustion is likely. Heatstroke may follow extended activity.In reference to the heat index, it's for places in shade and with a slight wind. The presence of direct sunlight can raise the heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', is an indicator that blends the effects of temperature and humidity to depict perceived warmth. A person's impression of weather can be swayed by numerous aspects, among them metabolic variations, pregnancy, and activity levels. Taking into account that direct sunlight can boost the heat effect, the heat index may rise by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Children often overlook the need for breaks and fluid intake. Thirst is a late-stage sign of dehydration - hence, it is necessary to stay hydrated, especially during extended periods of physical activities.
Humidity
The average relative humidity in September in Chattanooga is 61%.Rainfall
In September, in Chattanooga, the rain falls for 12.8 days. Throughout September, 2.36" (60mm) of precipitation is accumulated. Throughout the year, there are 109.7 rainfall days, and 22.4" (569mm) of precipitation is accumulated.Snowfall
In Chattanooga, snow does not fall in May through October.Daylight
In Chattanooga, the average length of the day in September is 12h and 23min.On the first day of September in Chattanooga, sunrise is at 7:08 am and sunset at 8:00 pm. On the last day of the month, sunrise is at 7:29 am and sunset at 7:19 pm CDT.
Sunshine
The average sunshine in September in Chattanooga is 8.7h.UV index
In Chattanooga, the average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for the average person.Note: The UV index of 6 in September translates into these instructions:
Embrace precautions and observe sun safety norms. Evasion of sunburn is a necessity. The Sun emits the most powerful UV radiation between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.
Frequently asked questions
Is it hot in Chattanooga during September?
What is the average humidity in September in Chattanooga?
How much does it rain in Chattanooga in September?
When it does not snow in Chattanooga?
What is the average length of the day in September in Chattanooga?
When are sunrise and sunset in September in Chattanooga?
How long on average sun shines in September in Chattanooga?
What is the UV index reading in September in Chattanooga?
Average temperature in September
Chattanooga, OK
- Average high temperature in September: 86.4°F
The warmest month (with the highest average high temperature) is July (95.9°F).
The month with the lowest average high temperature is December (51.3°F).
- Average low temperature in September: 67.3°F
The month with the highest average low temperature is July (74.8°F).
The coldest month (with the lowest average low temperature) is January (33.4°F).
Average pressure in September
Chattanooga, OK
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in September
Chattanooga, OK
- Average wind speed in September: 8.7mph
The windiest month (with the highest average wind speed) is April (12mph).
The calmest month (with the lowest average wind speed) is August (8.5mph).
Average humidity in September
Chattanooga, OK
- Average humidity in September: 61%
The month with the highest relative humidity is May (67%).
The month with the lowest relative humidity is August (52%).
Average rainfall in September
Chattanooga, OK
- Average rainfall in September: 2.36"
The wettest month (with the highest rainfall) is May (3.78").
The driest month (with the least rainfall) is February (0.83").
Average rainfall days in September
Chattanooga, OK
- Average rainfall days in September: 12.8 days
The month with the highest number of rainy days is May (13.9 days).
The month with the least rainy days is January (4.3 days).
Average snowfall in September
Chattanooga, OK
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.91").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Chattanooga, OK
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.3 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, OK
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in September: 8h and 4min
The months with the most sunshine are June and July (Average sunshine: 11h and 18min).
The month with the least sunshine is December (Average sunshine: 6h and 18min).
Average sunshine days in September
Chattanooga, OK
- Average sunshine days in September: 15.3 days
The month with the most sunshine days is January (25.2 days).
The month with the least sunshine days is May (14.5 days).
Average UV index in September
Chattanooga, OK
- Average UV index in September: 6
The months with the highest UV index are June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 2).
Average cloud cover in September
Chattanooga, OK
- Average cloud cover in September: 26
The month with the most cloud cover is March (Cloud cover 32).
The month with the least cloud cover is August (Cloud cover 17).
Average visibility in September
Chattanooga, OK
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Chattanooga, Oklahoma, USA
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