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
September ushers in a minute temperature change, with average high-temperatures reducing from August's tropical 86.7°F (30.4°C) to a moderately hot 81.1°F (27.3°C). Duncan experiences a mean low-temperature of 59.9°F (15.5°C) during September.Heat index
September's average heat index is estimated at a hot 86°F (30°C). If exposure and ongoing activity persist, they might induce a state of tiredness and heat cramps.Note that heat index values are valued for light wind and location in the shade. The heat index has the possibility to be enhanced by 15 Fahrenheit (8 Celsius) degrees when there is direct sun exposure.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', ties air temperature with relative humidity to produce the perceived temperature sensation. This effect is personal, influenced by the individual's physical activity and heat sensitivity, shaped by factors including wind, attire, and metabolic variations. Under direct sun rays, the felt temperature might be heightened, with the heat index increasing by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Children often do not understand the need to rest and hydrate. Thirst is a late manifestation of dehydration - therefore, it is essential to stay hydrated, particularly during prolonged physical activities.
Humidity
In September, the average relative humidity in Duncan is 74%.Rainfall
The month with the least rainfall is September, when the rain falls for 10.6 days and typically collects 0.94" (24mm) of precipitation.Snowfall
In Duncan, snow does not fall in April through September.Daylight
The average length of the day in September in Duncan is 12h and 23min.On the first day of the month, sunrise is at 7:08 am and sunset at 8:02 pm. On the last day of September, in Duncan, sunrise is at 7:30 am and sunset at 7:20 pm EDT.
Sunshine
In September, the average sunshine is 8.7h.UV index
The average daily maximum UV index in September in Duncan is 5. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for average individuals.Note: In September, a daily maximum UV index of 5 leads to the following instructions:
Preventative actions are necessary - Suggestions to safeguard against sun damage are in order. It's recommended to limit sun exposure when its radiation is at its peak during midday. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.
Frequently asked questions
What is the temperature in September in Duncan?
What is the average humidity in September in Duncan?
What is the driest month in Duncan?
How much does it rain in Duncan in September?
When it does not snow in Duncan?
Does it snow in Duncan in September?
How many hours of daylight does Duncan have in September?
When are sunrise and sunset in September in Duncan?
How long on average sun shines in September in Duncan?
What is the UV index intensity in September in Duncan?
Average temperature in September
Duncan, TN
- Average high temperature in September: 81.1°F
The warmest month (with the highest average high temperature) is July (87.6°F).
The month with the lowest average high temperature is January (44.8°F).
- Average low temperature in September: 59.9°F
The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (29.5°F).
Average pressure in September
Duncan, 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
Duncan, TN
- Average wind speed in September: 3.8mph
The windiest month (with the highest average wind speed) is April (5.9mph).
The calmest month (with the lowest average wind speed) is August (3.6mph).
Average humidity in September
Duncan, TN
- Average humidity in September: 74%
The month with the highest relative humidity is December (79%).
The month with the lowest relative humidity is August (72%).
Average rainfall in September
Duncan, TN
- Average rainfall in September: 0.94"
The wettest month (with the highest rainfall) is July (2.2").
The driest month (with the least rainfall) is September (0.94").
Average rainfall days in September
Duncan, TN
- Average rainfall days in September: 10.6 days
The month with the highest number of rainy days is July (16.3 days).
The month with the least rainy days is November (8.7 days).
Average snowfall in September
Duncan, TN
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.98").
The months with the least snowfall are April, May, June, July, August and September (0").
Average snowfall days in September
Duncan, TN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (5.4 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
Duncan, 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 4min
The month with the most sunshine is June (Average sunshine: 10h and 48min).
The month with the least sunshine is January (Average sunshine: 5h and 6min).
Average sunshine days in September
Duncan, TN
- Average sunshine days in September: 17.1 days
The month with the most sunshine days is November (19.3 days).
The months with the least sunshine days are February and July (12.5 days).
Average UV index in September
Duncan, 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
Duncan, TN
- Average cloud cover in September: 30
The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is June (Cloud cover 27).
Average visibility in September
Duncan, TN
- Average visibility in September: 6mi
The months with the highest visibility are April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February and March (5mi).
Duncan, Tennessee, USA
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