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 arrival of September signals a subtle shift in temperature, down from a hot 87.8°F (31°C) in August to a moderately hot 81.7°F (27.6°C). An average low-temperature of 61.7°F (16.5°C) is observed during the September nights.Heat index
The heat index value for September is evaluated at a tropical 86°F (30°C). With constant exposure and activity, a state of weariness might ensue, leading to potential heat cramps.Take into consideration that the heat index values are calculated for shade and light wind conditions. Heat index values might soar by up to 15 Fahrenheit (8 Celsius) degrees with exposure to direct sunshine.
Note: The heat index, also known as 'real feel' or 'feels like', is derived by integrating air temperature with the existing relative humidity to express the perceived warmth. Elements such as metabolic variations, being pregnant, and physical activity can impact one's weather perception. Exposure to direct sun rays can influence the heat you feel, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Young ones regularly neglect the requirement for rest and fluid replenishment. Thirst is a late stage of dehydration - so, it is necessary to keep hydrated, particularly during extended periods of physical exertion.
Humidity
The average relative humidity in September in Erin is 75%.Rainfall
September is the month with the least rainfall. Rain falls for 13.4 days and accumulates 1.85" (47mm) of precipitation.Snowfall
In Erin, snow does not fall in May through September.Daylight
In September, the average length of the day is 12h and 24min.On the first day of September, sunrise is at 6:22 am and sunset at 7:18 pm. On the last day of the month, sunrise is at 6:45 am and sunset at 6:35 pm CDT.
Sunshine
In September, the average sunshine in Erin is 8.9h.UV index
In September, the average daily maximum UV index in Erin is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for the ordinary person.Note: The maximum UV index of 5 during September translates into these guidelines:
Take necessary precautions - Defending against sun damage is advocated. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in Erin?
What is the average humidity in September in Erin?
What is the driest month in Erin?
How many days does it rain in September in Erin?
When it does not snow in Erin?
Does it snow in Erin in September?
What is the average length of the day in September in Erin?
What time are sunrise and sunset in September in Erin?
How long on average sun shines in September in Erin?
What is the UV index reading in September in Erin?
Average temperature in September
Erin, TN
- Average high temperature in September: 81.7°F
The warmest month (with the highest average high temperature) is July (88.9°F).
The month with the lowest average high temperature is January (43.7°F).
- Average low temperature in September: 61.7°F
The month with the highest average low temperature is July (68.7°F).
The coldest month (with the lowest average low temperature) is January (29.8°F).
Average pressure in September
Erin, TN
- Average pressure in September: 30.03"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).
Average wind speed in September
Erin, TN
- Average wind speed in September: 5.5mph
The windiest month (with the highest average wind speed) is February (8.4mph).
The calmest months (with the lowest average wind speed) are July and August (4.9mph).
Average humidity in September
Erin, TN
- Average humidity in September: 75%
The months with the highest relative humidity are March and December (79%).
The month with the lowest relative humidity is October (73%).
Average rainfall in September
Erin, TN
- Average rainfall in September: 1.85"
The wettest month (with the highest rainfall) is February (3.98").
The driest month (with the least rainfall) is September (1.85").
Average rainfall days in September
Erin, TN
- Average rainfall days in September: 13.4 days
The month with the highest number of rainy days is July (19.3 days).
The month with the least rainy days is November (9.8 days).
Average snowfall in September
Erin, TN
- Average snowfall in September: 0"
The month with the highest snowfall is March (0.91").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Erin, TN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (3.8 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
Erin, 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 5min
The month with the most sunshine is June (Average sunshine: 10h and 30min).
The months with the least sunshine are February and December (Average sunshine: 4h and 42min).
Average sunshine days in September
Erin, TN
- Average sunshine days in September: 14.6 days
The month with the most sunshine days is November (18.3 days).
The month with the least sunshine days is July (9.6 days).
Average UV index in September
Erin, 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
Erin, TN
- Average cloud cover in September: 30
The month with the most cloud cover is February (Cloud cover 51).
The month with the least cloud cover is June (Cloud cover 29).
Average visibility in September
Erin, TN
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, June, September, October, November and December (6mi).
The months with the lowest visibility are May, July and August (5mi).
Erin, Tennessee, USA
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