September weather forecastHuntsville, TN
September
Weather in September
The first month of the autumn, September, is also a moderately hot month in Huntsville, Tennessee, with an average temperature fluctuating between 78.3°F (25.7°C) and 56.5°F (13.6°C).Temperature
With the onset of September, Huntsville's average high-temperature slightly adjusts, moderately receding from August's 84.2°F (29°C) to a still warm 78.3°F (25.7°C). Huntsville's nighttime average of 56.5°F (13.6°C) during September reflects a substantial decrease from the daytime temperature.Humidity
In Huntsville, Tennessee, the average relative humidity in September is 79%.Rainfall
The months with the least rainfall in Huntsville are September and November Rain falls for 13.6 days and accumulates 2.56" (65mm) of rain.Snowfall
In Huntsville, snow does not fall in May through September.Daylight
In Huntsville, the average length of the day in September is 12h and 24min.On the first day of September in Huntsville, sunrise is at 7:09 am and sunset at 8:05 pm. On the last day of the month, sunrise is at 7:32 am and sunset at 7:22 pm EDT.
Sunshine
In Huntsville, Tennessee, the average sunshine in September is 7.9h.UV index
In September, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for the average person.Note: The maximum UV index of 5 during September translates into these guidelines:
Take necessary precautions - Defending against sun damage is advocated. It's recommended to limit sun exposure when its radiation is at its peak during midday. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Huntsville, TN
- Average high temperature in September: 78.3°F
The warmest month (with the highest average high temperature) is July (85.3°F).
The month with the lowest average high temperature is January (41.9°F).
- Average low temperature in September: 56.5°F
The month with the highest average low temperature is July (63.5°F).
The coldest month (with the lowest average low temperature) is January (27.1°F).
Average pressure in September
Huntsville, TN
- Average pressure in September: 30.03"Hg
The months with the highest atmospheric pressure are January and November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.97"Hg).
Average wind speed in September
Huntsville, TN
- Average wind speed in September: 4mph
The windiest month (with the highest average wind speed) is February (6.6mph).
The calmest month (with the lowest average wind speed) is August (3.9mph).
Average humidity in September
Huntsville, TN
- Average humidity in September: 79%
The months with the highest relative humidity are February and December (81%).
The month with the lowest relative humidity is June (77%).
Average rainfall in September
Huntsville, TN
- Average rainfall in September: 2.56"
The wettest month (with the highest rainfall) is February (4.53").
The driest months (with the least rainfall) are September and November (2.56").
Average rainfall days in September
Huntsville, TN
- Average rainfall days in September: 13.6 days
The months with the highest number of rainy days are May and July (18.8 days).
The month with the least rainy days is November (9.9 days).
Average snowfall in September
Huntsville, TN
- Average snowfall in September: 0"
The month with the highest snowfall is February (4.76").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Huntsville, TN
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (8.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Huntsville, TN
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in September: 7h and 54min
The month with the most sunshine is June (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days in September
Huntsville, TN
- Average sunshine days in September: 14.4 days
The month with the most sunshine days is November (16.9 days).
The month with the least sunshine days is July (9.8 days).
Average UV index in September
Huntsville, TN
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover in September
Huntsville, TN
- Average cloud cover in September: 39
The month with the most cloud cover is February (Cloud cover 59).
The month with the least cloud cover is June (Cloud cover 35).
Average visibility in September
Huntsville, TN
- Average visibility in September: 5mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
