September weather forecastColonial Forest, TN
September
Weather in September
The first month of the autumn, September, is still a warm month in Colonial Forest, Tennessee, with an average temperature fluctuating between 60.6°F (15.9°C) and 80.4°F (26.9°C).Temperature
During the shift to September, Colonial Forest records a mild decrease in average high-temperature, moving from a moderately hot 85.8°F (29.9°C) in August to a still warm 80.4°F (26.9°C). During the month of September, an average low-temperature of 60.6°F (15.9°C) is recorded.Humidity
The average relative humidity in September is 77%.Rainfall
September is the month with the least rainfall in Colonial Forest. Rain falls for 13.5 days and accumulates 1.97" (50mm) of precipitation.Snowfall
In Colonial Forest, snow does not fall in May through October.Daylight
The average length of the day in September is 12h and 24min.On the first day of the month, sunrise is at 6:14 am and sunset at 7:09 pm. On the last day of September, sunrise is at 6:37 am and sunset at 6:26 pm CDT.
Sunshine
In September, the average sunshine is 8.5h.UV index
In Colonial Forest, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for average individuals.Note: In September, the maximum UV index of 5 translates into these guidelines:
Stay alert. Light-skinned people could suffer burns in less than 30 minutes. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Colonial Forest, TN
- Average high temperature in September: 80.4°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 (43.9°F).
- Average low temperature in September: 60.6°F
The month with the highest average low temperature is July (66.7°F).
The coldest month (with the lowest average low temperature) is January (29.7°F).
Average pressure in September
Colonial Forest, 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 (29.97"Hg).
Average wind speed in September
Colonial Forest, TN
- Average wind speed in September: 4.5mph
The windiest month (with the highest average wind speed) is February (7.4mph).
The calmest month (with the lowest average wind speed) is August (4.2mph).
Average humidity in September
Colonial Forest, TN
- Average humidity in September: 77%
The month with the highest relative humidity is December (80%).
The month with the lowest relative humidity is November (75%).
Average rainfall in September
Colonial Forest, TN
- Average rainfall in September: 1.97"
The wettest month (with the highest rainfall) is February (4.09").
The driest month (with the least rainfall) is September (1.97").
Average rainfall days in September
Colonial Forest, TN
- Average rainfall days in September: 13.5 days
The month with the highest number of rainy days is July (18.3 days).
The month with the least rainy days is November (9.5 days).
Average snowfall in September
Colonial Forest, TN
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.61").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Colonial Forest, TN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (3.9 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
Colonial Forest, 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 30min
The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 24min).
Average sunshine days in September
Colonial Forest, TN
- Average sunshine days in September: 13.7 days
The month with the most sunshine days is November (18.7 days).
The month with the least sunshine days is July (10.3 days).
Average UV index in September
Colonial Forest, 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
Colonial Forest, TN
- Average cloud cover in September: 32
The month with the most cloud cover is February (Cloud cover 53).
The month with the least cloud cover is June (Cloud cover 29).
Average visibility in September
Colonial Forest, TN
- Average visibility in September: 5mi
The months with the highest visibility are February, April, June, October, November and December (6mi).
The months with the lowest visibility are January, March, May, July, August and September (5mi).
