September weather forecastDyer, TN
September
Weather in September
September, the first month of the autumn in Dyer, is also a moderately hot month, with an average temperature varying between 82°F (27.8°C) and 63°F (17.2°C).Temperature
The start of September sees the average high-temperature at a warm 82°F (27.8°C), showing little difference from August's 87.1°F (30.6°C). An average temperature of 63°F (17.2°C) marks the nights in September.Heat index
September's average heat index is calculated to be a hot 87.8°F (31°C). Ongoing activity coupled with exposure often results in weariness and could induce heat cramps.For clarity, heat index numbers account for light winds and areas under shade. Direct sunlight can cause a surge in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. The effect is personal, with varied weather perceptions among individuals due to differences in body mass, stature, and physical activity. You should know that direct sun exposure can heighten weather effects, potentially elevating the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Youngsters are usually more at risk than adults, considering they sweat less. Additionally, their high skin surface area compared to their little bodies and their high heat production due to activity increases their risk.
Humidity
In Dyer, the average relative humidity in September is 73%.Rainfall
The month with the least rainfall is September, when the rain falls for 12.6 days and typically collects 1.65" (42mm) of precipitation.Snowfall
In Dyer, snow does not fall in April through October.Daylight
In Dyer, the average length of the day in September is 12h and 23min.On the first day of September, sunrise is at 6:28 am and sunset at 7:23 pm. On the last day of the month, sunrise is at 6:50 am and sunset at 6:40 pm CDT.
Sunshine
In September, the average sunshine is 9.5h.UV index
In September, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for average individuals.Note: The daily high UV index of 5 during September translates into the following recommendations:
Guard yourself - Precautionary measures against sun damage are advocated. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. 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
Average temperature in September
Dyer, 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 (44.1°F).
- Average low temperature in September: 63°F
The month with the highest average low temperature is July (70.3°F).
The coldest month (with the lowest average low temperature) is January (30.6°F).
Average pressure in September
Dyer, 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
Dyer, TN
- Average wind speed in September: 6.3mph
The windiest month (with the highest average wind speed) is February (9.4mph).
The calmest month (with the lowest average wind speed) is July (5.5mph).
Average humidity in September
Dyer, TN
- Average humidity in September: 73%
The month with the highest relative humidity is March (79%).
The month with the lowest relative humidity is October (70%).
Average rainfall in September
Dyer, TN
- Average rainfall in September: 1.65"
The wettest month (with the highest rainfall) is April (4.33").
The driest month (with the least rainfall) is September (1.65").
Average rainfall days in September
Dyer, TN
- Average rainfall days in September: 12.6 days
The month with the highest number of rainy days is May (16.4 days).
The month with the least rainy days is October (10 days).
Average snowfall in September
Dyer, 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, September and October (0").
Average snowfall days in September
Dyer, TN
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (2.6 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Dyer, 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 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 42min).
Average sunshine days in September
Dyer, TN
- Average sunshine days in September: 15.6 days
The month with the most sunshine days is October (19.8 days).
The month with the least sunshine days is June (12.3 days).
Average UV index in September
Dyer, 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
Dyer, 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 25).
Average visibility in September
Dyer, 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).
