September weather forecastHeloise, TN
September
Weather in September
The first month of the autumn, September, is also a moderately hot month in Heloise, Tennessee, with temperature in the range of an average low of 63.9°F (17.7°C) and an average high of 82.2°F (27.9°C).Temperature
At the onset of September, Heloise records an average high-temperature of a moderately hot 82.2°F (27.9°C), showing little deviation from the preceding month. During the month of September, Heloise anticipates a mean low-temperature of 63.9°F (17.7°C).Heat index
The heat index in September is calculated to be a tropical 87.8°F (31°C). Long-lasting exposure and activity potentially induce a sense of weariness, with the risk of heat cramps.Heat index data is primarily for areas with shade and subjected to light winds. If exposed to direct sunlight, the heat index could climb by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is a measure of how hot it feels when the actual air humidity is factored in. The individual's impression of temperature can be affected by numerous factors such as metabolic variations, physical exertion, and attire. Taking into account that direct sunlight can boost the heat effect, the heat index may rise by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Kids are usually in more danger than grown-ups as they tend to sweat less. Plus, their bigger skin surface in relation to their small frames and increased heat generation due to their activity level make them more susceptible.
Humidity
In Heloise, the average relative humidity in September is 73%.Rainfall
The month with the least rainfall in Heloise is September, when the rain falls for 12.5 days and typically collects 1.81" (46mm) of precipitation.Snowfall
April through September are months without snowfall.Daylight
The average length of the day in September is 12h and 23min.On the first day of the month, sunrise is at 6:31 am and sunset at 7:25 pm. On the last day of September, sunrise is at 6:53 am and sunset at 6:43 pm CDT.
Sunshine
In September, the average sunshine is 9.7h.UV index
The average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for the average person.Note: A maximum UV index of 5 in September translates into the following recommendations:
Be cautious. Those with fair skin can be subjected to burns in fewer than 30 minutes. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. A hat with a broad brim is indispensable, filtering out up to half of UV rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Heloise, TN
- Average high temperature in September: 82.2°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 (44.6°F).
- Average low temperature in September: 63.9°F
The month with the highest average low temperature is July (71.4°F).
The coldest month (with the lowest average low temperature) is January (31.6°F).
Average pressure in September
Heloise, TN
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in September
Heloise, TN
- Average wind speed in September: 6.3mph
The windiest month (with the highest average wind speed) is February (9.8mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).
Average humidity in September
Heloise, TN
- Average humidity in September: 73%
The month with the highest relative humidity is March (78%).
The month with the lowest relative humidity is October (67%).
Average rainfall in September
Heloise, TN
- Average rainfall in September: 1.81"
The wettest month (with the highest rainfall) is March (4.29").
The driest month (with the least rainfall) is September (1.81").
Average rainfall days in September
Heloise, TN
- Average rainfall days in September: 12.5 days
The month with the highest number of rainy days is May (16.9 days).
The month with the least rainy days is November (9.6 days).
Average snowfall in September
Heloise, TN
- Average snowfall in September: 0"
The month with the highest snowfall is March (1.46").
The months with the least snowfall are April, May, June, July, August and September (0").
Average snowfall days in September
Heloise, TN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.2 days).
The months with the least snowfall days are April, May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Heloise, 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 48min).
- Average sunshine in September: 9h and 42min
The month with the most sunshine is June (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in September
Heloise, TN
- Average sunshine days in September: 15.8 days
The months with the most sunshine days are October and November (18.5 days).
The month with the least sunshine days is May (12.2 days).
Average UV index in September
Heloise, TN
- Average UV index in September: 5
The months with the highest UV index are June and July (UV index 7).
The month with the lowest UV index is December (UV index 2).
Average cloud cover in September
Heloise, TN
- Average cloud cover in September: 26
The months with the most cloud cover are February and March (Cloud cover 47).
The month with the least cloud cover is June (Cloud cover 24).
Average visibility in September
Heloise, TN
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
