September weather forecastSelmer, TN
September
Weather in September
The first month of the autumn, September, is still a warm month in Selmer, Tennessee, with an average temperature fluctuating between 83.3°F (28.5°C) and 63.5°F (17.5°C).Temperature
Selmer sees the arrival of September with an average high-temperature of a moderately hot 83.3°F (28.5°C), indicating a subtle variation from August. Selmer anticipates an average minimum temperature of 63.5°F (17.5°C) in the month of September.Heat index
September's average heat index is estimated at a tropical 89.6°F (32°C). Long-standing exposure coupled with ongoing activity could result in exhaustion, possibly causing heat cramps.It is essential to grasp that the heat index's numbers are for shade and light wind settings. Uninterrupted exposure to the sun may boost the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', takes into account both air temperature and humidity to illustrate what people actually feel. The effect is experienced differently by individuals, hinging on unique characteristics such as body mass, stature, and level of activity. Considering the impact of direct sunlight, it's possible for the heat index to surge by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Children often fail to recognize the requirement to rest and rehydrate. Thirst, being a late symptom of dehydration, underlines the importance of maintaining hydration, especially during ongoing physical activities.
Humidity
In September, the average relative humidity is 73%.Rainfall
The month with the least rainfall is September, when the rain falls for 13.5 days and typically collects 1.97" (50mm) of precipitation.Snowfall
In Selmer, snow does not fall in April through October.Daylight
In Selmer, the average length of the day in September is 12h and 23min.On the first day of the month, sunrise is at 6:27 am and sunset at 7:20 pm. On the last day of September, sunrise is at 6:48 am and sunset at 6:39 pm CDT.
Sunshine
In September, the average sunshine is 9.2h.UV index
In Selmer, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for the average person.Note: In September, the maximum UV index of 5 transforms into these recommendations:
Adopt protective measures - Suggestions to resist sunburn are offered. Direct Sun exposure should be minimized especially during midday when radiation is most intense. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Selmer, TN
- Average high temperature in September: 83.3°F
The warmest month (with the highest average high temperature) is July (89.2°F).
The month with the lowest average high temperature is January (46.9°F).
- Average low temperature in September: 63.5°F
The month with the highest average low temperature is July (69.8°F).
The coldest month (with the lowest average low temperature) is January (32.5°F).
Average pressure in September
Selmer, 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 (29.96"Hg).
Average wind speed in September
Selmer, TN
- Average wind speed in September: 5.4mph
The windiest month (with the highest average wind speed) is February (8.1mph).
The calmest month (with the lowest average wind speed) is July (4.8mph).
Average humidity in September
Selmer, TN
- Average humidity in September: 73%
The month with the highest relative humidity is March (80%).
The month with the lowest relative humidity is October (72%).
Average rainfall in September
Selmer, TN
- Average rainfall in September: 1.97"
The wettest month (with the highest rainfall) is February (4.72").
The driest month (with the least rainfall) is September (1.97").
Average rainfall days in September
Selmer, TN
- Average rainfall days in September: 13.5 days
The month with the highest number of rainy days is July (17.9 days).
The month with the least rainy days is November (10.6 days).
Average snowfall in September
Selmer, TN
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.63").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Selmer, TN
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (2.1 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
Selmer, TN
- Average daylight in September: 12h and 24min
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: 9h and 12min
The month with the most sunshine is June (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days in September
Selmer, TN
- Average sunshine days in September: 14.8 days
The month with the most sunshine days is October (19.5 days).
The month with the least sunshine days is July (11.3 days).
Average UV index in September
Selmer, 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
Selmer, TN
- Average cloud cover in September: 29
The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is June (Cloud cover 28).
Average visibility in September
Selmer, 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).
