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
The onset of September brings a small shift in high-temperatures, falling from 85.6°F (29.8°C) in August to a still moderately hot 79.7°F (26.5°C). Alpine reports a consistent average low-temperature of 59.5°F (15.3°C) throughout September nights.Humidity
In Alpine, the average relative humidity in September is 77%.Rainfall
The month with the least rainfall is September, when the rain falls for 12.5 days and typically collects 1.97" (50mm) of precipitation.Snowfall
May through September are months without snowfall.Daylight
In Alpine, Tennessee, the average length of the day in September is 12h and 24min.On the first day of the month, sunrise is at 6:12 am and sunset at 7:08 pm. On the last day of September, in Alpine, sunrise is at 6:35 am and sunset at 6:25 pm CDT.
Sunshine
In Alpine, the average sunshine in September is 8.2h.UV index
In September, the average daily maximum UV index in Alpine is 5. A UV Index reading of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for the average person.Note: The maximum daily UV index of 5 during September translates into the following directions:
Stay alert. Light-skinned people could suffer burns in less than 30 minutes. Avoiding the Sun during its peak radiation time around midday is a healthy practice. 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
What are the temperatures in Alpine in September?
What is the average humidity in September in Alpine?
What is the driest month in Alpine?
How much does it rain in Alpine in September?
When it does not snow in Alpine?
Does it snow in Alpine in September?
What is the average length of the day in September in Alpine?
When is the sunrise / sunset in September in Alpine?
How long on average sun shines in September in Alpine?
How high is the UV index in September in Alpine?
Average temperature in September
Alpine, TN
- Average high temperature in September: 79.7°F
The warmest month (with the highest average high temperature) is July (86.2°F).
The month with the lowest average high temperature is January (43.3°F).
- Average low temperature in September: 59.5°F
The month with the highest average low temperature is July (65.3°F).
The coldest month (with the lowest average low temperature) is January (28.8°F).
Average pressure in September
Alpine, TN
- Average pressure in September: 30.03"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.97"Hg).
Average wind speed in September
Alpine, TN
- Average wind speed in September: 4.4mph
The windiest month (with the highest average wind speed) is February (7.5mph).
The calmest month (with the lowest average wind speed) is August (4.1mph).
Average humidity in September
Alpine, TN
- Average humidity in September: 77%
The month with the highest relative humidity is December (80%).
The months with the lowest relative humidity are October and November (76%).
Average rainfall in September
Alpine, TN
- Average rainfall in September: 1.97"
The wettest month (with the highest rainfall) is February (4.02").
The driest month (with the least rainfall) is September (1.97").
Average rainfall days in September
Alpine, TN
- Average rainfall days in September: 12.5 days
The month with the highest number of rainy days is July (17.6 days).
The month with the least rainy days is November (10.8 days).
Average snowfall in September
Alpine, TN
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.2").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Alpine, TN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (5.6 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
Alpine, 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 1min
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 18min).
Average sunshine days in September
Alpine, TN
- Average sunshine days in September: 14.7 days
The month with the most sunshine days is October (18.6 days).
The month with the least sunshine days is July (10.8 days).
Average UV index in September
Alpine, 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
Alpine, 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 30).
Average visibility in September
Alpine, 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).
Alpine, Tennessee, USA
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