United StatesAverage weather for Chattanooga in September
It's hot in September in Chattanooga with an average temperature of 30°C. Temperatures this month range from a low of 27°C to a high of 32°C. At night, you can expect temperatures between 17°C and 22°C.
Start of September
The month of September starts in Chattanooga with hot temps, averaging around 32°C during the day and nights around 21°C. A few showers might pop up early in the month, but overall, it’ll stay mostly sunny and dry.
Mid September
By mid-September, daytime temps drop to around 30°C, with nights around 20°C. There’s a chance of some showers during this time, but plenty of dry and sunny days too.
Since it cools down at night, it’s a good idea to wear layers.
End of September
By the end of September, the average daytime temperature in Chattanooga is around 29°C, while nighttime temps are about 18°C. A shower might pop up, but overall, the weather will be dry and sunny.
Because temperatures drop in the evening, wearing layers is recommended.
In September, there is an average of 83 mm of precipitation, spread over 6 days. The wind speed is around 3 Bft, mostly coming from the Southeast.
Chattanooga in September |
New York | ||
|---|---|---|---|
 Average temperature |
30°C | 27°C | |
 Max. temperature |
32°C | 31°C | |
| Min. temperature |
27°C | -5°C | |
 Total precipitation |
83 mm | 57 mm | |
| Rainy days |
6 days | 9 days | |
August
UV index
The UV index is a maximum of 7 this month. That's a moderate to high value on the intensity scale of 1 to 11. Unprotected skin can burn within 15-25 minutes.
Is September a good time to visit Chattanooga?
September is a good month to be in Chattanooga for sunny weather. You’ll have high temperatures and not too much rain.
Temperature records
With 38°C in 2019, Chattanooga reached the highest temperature in September over the past 10 years. The lowest daytime temperature in this month was 17°C in 2017. The extreme nighttime temperatures ranged from a lowest recorded value of 8°C to a highest value of 25°C.
Check out the climate of Chattanooga for all months and discover the best travel time
Daily Temperature in September in Chattanooga
This chart shows the average daily high and low temperatures in September for Chattanooga, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.
Daily Precipitation in September in Chattanooga
The chart below shows the average daily precipitation in September for Chattanooga, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for September, you can expect about 6 days of precipitation in Chattanooga.
Daily UV index in September in Chattanooga
This chart shows the average daily UV index in September in Chattanooga, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in September in Chattanooga over the years
This chart shows the average temperature in September in Chattanooga, measured in degrees Celsius, over the past few years.
Total precipitation in September in Chattanooga over the years
This chart shows the average precipitation in September in Chattanooga, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Daily weather in September for Chattanooga
Click on any day in September to get detailed info about the usual weather on that day in Chattanooga. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in September in Chattanooga
Have you been to Chattanooga in September?
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Average weather in Chattanooga by month
Click on a month below to see detailed weather info for Chattanooga. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
Or check out the climate of Chattanooga for all months at once
