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 brings a slight decrease in temperature, down from a hot 87.4°F (30.8°C) in August to a moderately hot 81.9°F (27.7°C). In the month of September, the nighttime temperature dips to a steady average of 61°F (16.1°C).Heat index
The average heat index in September is calculated to be a hot 87.8°F (31°C). If exposure and activity persist, fatigue could ensue, possibly leading to heat cramps.Heat index details are generally centered around shaded locations and a mild breeze. An exposure to direct sunlight may lift the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', marries air temperature and humidity to produce a value illustrating perceived warmth. The impact of temperature is individual, as people's perception of weather may change based on their body mass, height, and physical activity. Direct exposure to sun rays can potentially augment the heat sensation, elevating the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. In general, children are more at risk than adults because they sweat less. Furthermore, the large skin surface compared to their small bodies and the high heat production due to their actions contribute to this vulnerability.
Humidity
June through November, with an average relative humidity of 75%, are the least humid months.Rainfall
The month with the least rainfall is September, when the rain falls for 11.1 days and typically collects 1.3" (33mm) of precipitation.Snowfall
April through October are months without snowfall.Daylight
In Hills and Dales, the average length of the day in September is 12h and 23min.On the first day of the month, sunrise is at 7:12 am and sunset at 8:06 pm. On the last day of September, in Hills and Dales, sunrise is at 7:34 am and sunset at 7:24 pm EDT.
Sunshine
The average sunshine in September is 8.6h.UV index
In September, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for average individuals.Note: The maximum UV index, 5 during September, leads to the following recommendations:
Undertake precautions - Guarding against sun damage is counselled. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. Experience reduced UV exposure by about half when donning a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Hills and Dales in September?
What are the least humid months?
What is the average humidity in September?
What is the driest month?
How many days does it rain in September?
When it does not snow?
What is the average length of the day in September?
What time are sunrise and sunset in September?
How long on average sun shines in September?
What is the UV index intensity in September?
Average temperature in September
Hills and Dales, TN
- Average high temperature in September: 81.9°F
The warmest month (with the highest average high temperature) is July (87.8°F).
The month with the lowest average high temperature is January (46.4°F).
- Average low temperature in September: 61°F
The month with the highest average low temperature is July (66.4°F).
The coldest month (with the lowest average low temperature) is January (30.9°F).
Average pressure in September
Hills and Dales, 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 (29.98"Hg).
Average wind speed in September
Hills and Dales, TN
- Average wind speed in September: 4.1mph
The windiest month (with the highest average wind speed) is February (6.6mph).
The calmest month (with the lowest average wind speed) is August (3.8mph).
Average humidity in September
Hills and Dales, TN
- Average humidity in September: 75%
The month with the highest relative humidity is December (80%).
The months with the lowest relative humidity are June, July, August, September, October and November (75%).
Average rainfall in September
Hills and Dales, TN
- Average rainfall in September: 1.3"
The wettest month (with the highest rainfall) is July (2.64").
The driest month (with the least rainfall) is September (1.3").
Average rainfall days in September
Hills and Dales, TN
- Average rainfall days in September: 11.1 days
The month with the highest number of rainy days is July (17 days).
The month with the least rainy days is November (7.3 days).
Average snowfall in September
Hills and Dales, TN
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.75").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Hills and Dales, TN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.7 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
Hills and Dales, 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 36min).
The month with the least sunshine is December (Average sunshine: 5h and 6min).
Average sunshine days in September
Hills and Dales, TN
- Average sunshine days in September: 16.4 days
The months with the most sunshine days are October and November (21.2 days).
The month with the least sunshine days is July (11.6 days).
Average UV index in September
Hills and Dales, 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
Hills and Dales, TN
- Average cloud cover in September: 31
The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is June (Cloud cover 29).
Average visibility in September
Hills and Dales, TN
- Average visibility in September: 6mi
The months with the highest visibility are February, March, April, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, May and December (5mi).
Hills and Dales, Tennessee, USA
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