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
In the transition to September, Duff observes a minor drop in the average high-temperature, shifting from 84.9°F (29.4°C) in August to a still moderately hot 79.2°F (26.2°C). Duff records a marked daily temperature contrast, with an average low-temperature of 57.2°F (14°C) during the nights of September.Humidity
In Duff, the average relative humidity in September is 78%.Rainfall
The month with the least rainfall in Duff is September, when the rain falls for 12.6 days and typically collects 1.89" (48mm) of precipitation.Snowfall
May through October are months without snowfall in Duff.Daylight
In Duff, the average length of the day in September is 12h and 24min.On the first day of September, sunrise is at 7:08 am and sunset at 8:03 pm. On the last day of the month, sunrise is at 7:31 am and sunset at 7:20 pm EDT.
Sunshine
In September, the average sunshine in Duff is 8.4h.UV index
In September, the average daily maximum UV index in Duff is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for the ordinary person.Note: The UV index of 5 during September translates into the following guidance:
Take necessary precautions - Suggestions to elude sunburn are provided. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September in Duff?
What is the average humidity in September in Duff?
What is the driest month in Duff?
How many days does it rain in September in Duff?
When it does not snow in Duff?
How many hours of daylight does Duff have in September?
What time are sunrise and sunset in September in Duff?
How long on average sun shines in September in Duff?
How high is the UV index in September in Duff?
Average temperature in September
Duff, TN
- Average high temperature in September: 79.2°F
The warmest month (with the highest average high temperature) is July (86°F).
The month with the lowest average high temperature is January (42.3°F).
- Average low temperature in September: 57.2°F
The month with the highest average low temperature is July (63.7°F).
The coldest month (with the lowest average low temperature) is January (27.7°F).
Average pressure in September
Duff, TN
- Average pressure in September: 30.04"Hg
The months with the highest atmospheric pressure are January and November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).
Average wind speed in September
Duff, TN
- Average wind speed in September: 3.7mph
The windiest month (with the highest average wind speed) is April (6.2mph).
The calmest month (with the lowest average wind speed) is August (3.5mph).
Average humidity in September
Duff, TN
- Average humidity in September: 78%
The months with the highest relative humidity are February and December (81%).
The month with the lowest relative humidity is August (76%).
Average rainfall in September
Duff, TN
- Average rainfall in September: 1.89"
The wettest month (with the highest rainfall) is February (3.94").
The driest month (with the least rainfall) is September (1.89").
Average rainfall days in September
Duff, TN
- Average rainfall days in September: 12.6 days
The month with the highest number of rainy days is July (19.3 days).
The month with the least rainy days is November (9.4 days).
Average snowfall in September
Duff, TN
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.01").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Duff, TN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (5.5 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Duff, TN
- Average daylight in September: 12h and 2min
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: 8h and 2min
The month with the most sunshine is June (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).
Average sunshine days in September
Duff, TN
- Average sunshine days in September: 15.5 days
The month with the most sunshine days is October (18.8 days).
The month with the least sunshine days is July (10.1 days).
Average UV index in September
Duff, 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, February and December (UV index 2).
Average cloud cover in September
Duff, TN
- Average cloud cover in September: 35
The month with the most cloud cover is February (Cloud cover 56).
The months with the least cloud cover are June and August (Cloud cover 32).
Average visibility in September
Duff, TN
- Average visibility in September: 5mi
The month with the highest visibility is November (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October and December (5mi).
Duff, Tennessee, USA
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