Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
In Sun Valley, the average high-temperature in September gently drops from a hot 86.2°F (30.1°C) in August to a warm 80.1°F (26.7°C). Sun Valley experiences an average nighttime temperature of 59.7°F (15.4°C) in the month of September.Humidity
In September, the average relative humidity in Sun Valley, Tennessee, is 77%.Rainfall
The month with the least rainfall in Sun Valley is September, when the rain falls for 12 days and typically collects 2.01" (51mm) of precipitation.Snowfall
May through October are months without snowfall in Sun Valley.Daylight
In September, the average length of the day is 12h and 24min.On the first day of September, sunrise is at 6:14 am and sunset at 7:09 pm. On the last day of the month, sunrise is at 6:37 am and sunset at 6:26 pm CDT.
Sunshine
In Sun Valley, the average sunshine in September is 8.4h.UV index
The average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for the ordinary person.Note: The maximum UV index of 5 during September translates into these guidelines:
Take precautions - Protection against skin and eye damage is obliged. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.
Frequently asked questions
What are September temperatures in Sun Valley?
What is the average humidity in September in Sun Valley?
What is the driest month in Sun Valley?
How much does it rain in Sun Valley in September?
When it does not snow in Sun Valley?
How many hours of daylight does Sun Valley have in September?
When are sunrise and sunset in September in Sun Valley?
How long on average sun shines in September in Sun Valley?
What is the UV index intensity in September in Sun Valley?
Average temperature in September
Sun Valley, TN
- Average high temperature in September: 80.1°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 (43.5°F).
- Average low temperature in September: 59.7°F
The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (29.3°F).
Average pressure in September
Sun Valley, 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
Sun Valley, TN
- Average wind speed in September: 4.5mph
The windiest month (with the highest average wind speed) is February (7.5mph).
The calmest months (with the lowest average wind speed) are July and August (4.3mph).
Average humidity in September
Sun Valley, TN
- Average humidity in September: 77%
The months with the highest relative humidity are February, March and December (79%).
The month with the lowest relative humidity is November (75%).
Average rainfall in September
Sun Valley, TN
- Average rainfall in September: 2.01"
The wettest month (with the highest rainfall) is February (4.09").
The driest month (with the least rainfall) is September (2.01").
Average rainfall days in September
Sun Valley, TN
- Average rainfall days in September: 12 days
The month with the highest number of rainy days is July (18.1 days).
The month with the least rainy days is November (10.8 days).
Average snowfall in September
Sun Valley, TN
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.02").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Sun Valley, TN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (4.6 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
Sun Valley, TN
- Average daylight in September: 12h and 2min
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: 8h and 2min
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
Sun Valley, TN
- Average sunshine days in September: 16 days
The month with the most sunshine days is October (18.2 days).
The months with the least sunshine days are February and July (11.3 days).
Average UV index in September
Sun Valley, 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
Sun Valley, TN
- Average cloud cover in September: 32
The month with the most cloud cover is February (Cloud cover 54).
The month with the least cloud cover is June (Cloud cover 29).
Average visibility in September
Sun Valley, TN
- Average visibility in September: 5mi
The months with the highest visibility are February, March, April, June, October, November and December (6mi).
The months with the lowest visibility are January, May, July, August and September (5mi).
Sun Valley, Tennessee, USA
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