September weather forecastChestnut Hills, TN
September
Weather in September
September, the first month of the autumn in Chestnut Hills, is still a warm month, with an average temperature ranging between max 80.2°F (26.8°C) and min 59°F (15°C).Temperature
A subtle shift in Chestnut Hills's weather is observed as August turns into September, with the average high temperature reducing from 85.8°F (29.9°C) to a still warm 80.2°F (26.8°C). Chestnut Hills, during September, witnesses an average low-temperature of 59°F (15°C).Humidity
In Chestnut Hills, the average relative humidity in September is 77%.Rainfall
The month with the least rainfall is September, when the rain falls for 12.6 days and typically collects 1.97" (50mm) of precipitation.Snowfall
In Chestnut Hills, snow does not fall in May through October.Daylight
In September, the average length of the day is 12h and 23min.On the first day of September, sunrise is at 7:10 am and sunset at 8:04 pm. On the last day of the month, sunrise is at 7:32 am and sunset at 7:22 pm EDT.
Sunshine
The average sunshine in September is 8.4h.UV index
In September, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for average individuals.Note: A daily maximum UV index of 5 in September translates into the following instructions:
Put precautions into practice - Ensuring skin and eye safety is a necessity. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. 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
Chestnut Hills, TN
- Average high temperature in September: 80.2°F
The warmest month (with the highest average high temperature) is July (86.5°F).
The month with the lowest average high temperature is January (44.1°F).
- Average low temperature in September: 59°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (29.1°F).
Average pressure in September
Chestnut Hills, 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
Chestnut Hills, TN
- Average wind speed in September: 3.9mph
The windiest month (with the highest average wind speed) is April (6.3mph).
The calmest month (with the lowest average wind speed) is August (3.7mph).
Average humidity in September
Chestnut Hills, TN
- Average humidity in September: 77%
The month with the highest relative humidity is December (80%).
The months with the lowest relative humidity are June, August, October and November (76%).
Average rainfall in September
Chestnut Hills, TN
- Average rainfall in September: 1.97"
The wettest month (with the highest rainfall) is July (4.09").
The driest month (with the least rainfall) is September (1.97").
Average rainfall days in September
Chestnut Hills, TN
- Average rainfall days in September: 12.6 days
The month with the highest number of rainy days is July (18.8 days).
The month with the least rainy days is November (8.9 days).
Average snowfall in September
Chestnut Hills, TN
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.06").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Chestnut Hills, TN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (4.8 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
Chestnut Hills, 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: 8h and 24min
The month with the most sunshine is June (Average sunshine: 10h and 18min).
The months with the least sunshine are January and December (Average sunshine: 4h and 48min).
Average sunshine days in September
Chestnut Hills, TN
- Average sunshine days in September: 15.1 days
The month with the most sunshine days is November (19.3 days).
The month with the least sunshine days is July (10.7 days).
Average UV index in September
Chestnut Hills, 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
Chestnut Hills, TN
- Average cloud cover in September: 33
The month with the most cloud cover is February (Cloud cover 54).
The month with the least cloud cover is June (Cloud cover 31).
Average visibility in September
Chestnut Hills, TN
- Average visibility in September: 5mi
The months with the highest visibility are June, October and November (6mi).
The months with the lowest visibility are January, February, March, April, May, July, August, September and December (5mi).
