September weather forecastGreenfield, TN
September
Weather in September
The first month of the autumn, September, is still a warm month in Greenfield, Tennessee, with temperature in the range of an average low of 62.8°F (17.1°C) and an average high of 82°F (27.8°C).Temperature
With the onset of September, the average high-temperature stands at a warm 82°F (27.8°C), closely aligned with August's 87.1°F (30.6°C). Greenfield experiences a nighttime temperature average of 62.8°F (17.1°C) during September.Heat index
For most parts of September, the heat index is estimated at a tropical 87.8°F (31°C). Exhaustion might be the outcome of enduring exposure and continuous activity, with a risk of heat cramps.Take note of the fact that heat index values are based on shaded circumstances with light airflows. Heat index values may surge by up to 15 Fahrenheit (8 Celsius) degrees in the presence of direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'real feel', combines both the air temperature and the humidity level to give a perceived human temperature. An individual's perception of weather can be swayed by a variety of elements including metabolic differences, pregnancy status, and their level of physical exertion. It is important to note that direct sunlight can intensify the weather impact, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it's vital to remain hydrated, particularly during prolonged physical activities.
Humidity
In Greenfield, the average relative humidity in September is 73%.Rainfall
September is the month with the least rainfall in Greenfield. Rain falls for 13.1 days and accumulates 1.77" (45mm) of precipitation.Snowfall
April through October are months without snowfall.Daylight
In September, the average length of the day in Greenfield, Tennessee, is 12h and 24min.On the first day of the month, sunrise is at 6:27 am and sunset at 7:22 pm. On the last day of September, sunrise is at 6:50 am and sunset at 6:39 pm CDT.
Sunshine
The average sunshine in September is 9.5h.UV index
In September, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for the average person.Note: The maximum daily UV index, 5 in September, converts into the following recommendations:
Take necessary precautions - Suggestions to elude sunburn are provided. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Greenfield, TN
- Average high temperature in September: 82°F
The warmest month (with the highest average high temperature) is July (88°F).
The month with the lowest average high temperature is January (43.9°F).
- Average low temperature in September: 62.8°F
The month with the highest average low temperature is July (70.2°F).
The coldest month (with the lowest average low temperature) is January (30.6°F).
Average pressure in September
Greenfield, TN
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in September
Greenfield, TN
- Average wind speed in September: 6.2mph
The windiest month (with the highest average wind speed) is February (9.1mph).
The calmest month (with the lowest average wind speed) is July (5.4mph).
Average humidity in September
Greenfield, TN
- Average humidity in September: 73%
The months with the highest relative humidity are March and May (79%).
The month with the lowest relative humidity is October (71%).
Average rainfall in September
Greenfield, TN
- Average rainfall in September: 1.77"
The wettest month (with the highest rainfall) is February (4.25").
The driest month (with the least rainfall) is September (1.77").
Average rainfall days in September
Greenfield, TN
- Average rainfall days in September: 13.1 days
The month with the highest number of rainy days is May (16.5 days).
The month with the least rainy days is October (10.2 days).
Average snowfall in September
Greenfield, TN
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.34").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Greenfield, TN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (3.1 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Greenfield, 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: 9h and 30min
The month with the most sunshine is June (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days in September
Greenfield, TN
- Average sunshine days in September: 15.5 days
The month with the most sunshine days is October (19.8 days).
The month with the least sunshine days is June (11.8 days).
Average UV index in September
Greenfield, TN
- Average UV index in September: 5
The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are February and December (UV index 2).
Average cloud cover in September
Greenfield, TN
- Average cloud cover in September: 27
The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is June (Cloud cover 26).
Average visibility in September
Greenfield, 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).
