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 transition into September reveals an average high-temperature of a still moderately hot 76.1°F (24.5°C), mirroring a close resemblance to August. From the height of daytime heat, the temperature recedes to an average of 54°F (12.2°C) at night during September.Humidity
In September, the average relative humidity is 79%.Rainfall
September is the month with the least rainfall in Erwin. Rain falls for 14.8 days and accumulates 1.69" (43mm) of precipitation.Snowfall
May through September are months without snowfall.Daylight
The average length of the day in September is 12h and 24min.On the first day of the month, sunrise is at 7:01 am and sunset at 7:56 pm. On the last day of September, sunrise is at 7:24 am and sunset at 7:14 pm EDT.
Sunshine
In September, the average sunshine is 8.5h.UV index
In September, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: In September, the average maximum UV index of 4 translates into the following recommendations:
Exercise caution. Those with pale skin may experience burns in less than half an hour. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in September?
What is the average humidity in September?
What is the driest month?
How many days does it rain in September in Erwin?
When it does not snow?
Does it snow in September?
How many hours of daylight does Erwin have in September?
When are sunrise and sunset in September?
How many hours of sunshine does Erwin have in September?
What is the UV index reading in September?
Average temperature in September
Erwin, TN
- Average high temperature in September: 76.1°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (41.7°F).
- Average low temperature in September: 54°F
The month with the highest average low temperature is July (59.2°F).
The coldest month (with the lowest average low temperature) is January (26.1°F).
Average pressure in September
Erwin, TN
- Average pressure in September: 30.05"Hg
The month with the highest atmospheric pressure is November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.99"Hg).
Average wind speed in September
Erwin, TN
- Average wind speed in September: 3.9mph
The windiest months (with the highest average wind speed) are January, February and April (6.5mph).
The calmest month (with the lowest average wind speed) is August (3.5mph).
Average humidity in September
Erwin, TN
- Average humidity in September: 79%
The months with the highest relative humidity are February and December (80%).
The month with the lowest relative humidity is November (76%).
Average rainfall in September
Erwin, TN
- Average rainfall in September: 1.69"
The wettest month (with the highest rainfall) is July (3.07").
The driest month (with the least rainfall) is September (1.69").
Average rainfall days in September
Erwin, TN
- Average rainfall days in September: 14.8 days
The month with the highest number of rainy days is May (19.4 days).
The month with the least rainy days is November (9.7 days).
Average snowfall in September
Erwin, TN
- Average snowfall in September: 0"
The month with the highest snowfall is December (3.7").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Erwin, TN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (7.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Erwin, 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 3min
The month with the most sunshine is June (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 54min).
Average sunshine days in September
Erwin, TN
- Average sunshine days in September: 12.7 days
The month with the most sunshine days is October (18.2 days).
The month with the least sunshine days is July (8.3 days).
Average UV index in September
Erwin, TN
- Average UV index in September: 4
The months with the highest UV index are June 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
Erwin, TN
- Average cloud cover in September: 37
The month with the most cloud cover is February (Cloud cover 54).
The months with the least cloud cover are June and August (Cloud cover 34).
Average visibility in September
Erwin, TN
- Average visibility in September: 5mi
The month with the highest visibility is November (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October and December (5mi).
Erwin, Tennessee, USA
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