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 September, the meteorological conditions change slightly, with the average high-temperature moving from a tropical 86.9°F (30.5°C) in August to a moderately hot 81.5°F (27.5°C). An average temperature of 62.8°F (17.1°C) marks the nights in Aspen Hill, Tennessee, in September.Heat index
The average heat index in September is computed to be a hot 86°F (30°C). One might feel worn out with persistent exposure and activity, resulting in heat cramps.Keep in mind the heat index values are meant for areas in shade and with light wind. Direct sunlight can potentially boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is an aggregate value of air's warmth and moisture to show the human-felt temperature. Additional elements encompassing metabolic differences, the degree of physical activity, and attire can impact the individual's perception of temperature. It is noteworthy that being in direct sunlight can enhance the weather's impact, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Typically, young kids are at a higher risk than adults since they sweat less. Also, the larger skin surface in proportion to their small bodies and the heightened heat production due to their active nature adds to their vulnerability.
Humidity
In Aspen Hill, the average relative humidity in September is 75%.Rainfall
September is the month with the least rainfall in Aspen Hill. Rain falls for 14.1 days and accumulates 2.52" (64mm) of precipitation.Snowfall
May through October are months without snowfall.Daylight
In September, the average length of the day is 12h and 23min.On the first day of the month, sunrise is at 6:21 am and sunset at 7:14 pm. On the last day of September, sunrise is at 6:42 am and sunset at 6:32 pm CDT.
Sunshine
In Aspen Hill, Tennessee, the average sunshine in September is 8.6h.UV index
In September, the average daily maximum UV index in Aspen Hill is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for the average person.Note: The maximum UV index of 5 during September translates into these guidelines:
Ensure safety - Sun damage prevention is strongly urged. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
Frequently asked questions
What are September temperatures in Aspen Hill?
What is the average humidity in September in Aspen Hill?
What is the driest month in Aspen Hill?
How many days does it rain in September in Aspen Hill?
When it does not snow in Aspen Hill?
What is the average length of the day in September in Aspen Hill?
What time are sunrise and sunset in September in Aspen Hill?
How many hours of sunshine does Aspen Hill have in September?
How high is the UV index in September in Aspen Hill?
Average temperature in September
Aspen Hill, TN
- Average high temperature in September: 81.5°F
The warmest month (with the highest average high temperature) is July (88°F).
The month with the lowest average high temperature is January (45.9°F).
- Average low temperature in September: 62.8°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 (31.8°F).
Average pressure in September
Aspen Hill, TN
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.97"Hg).
Average wind speed in September
Aspen Hill, TN
- Average wind speed in September: 5.3mph
The windiest month (with the highest average wind speed) is February (8.8mph).
The calmest month (with the lowest average wind speed) is July (4.7mph).
Average humidity in September
Aspen Hill, TN
- Average humidity in September: 75%
The month with the highest relative humidity is December (80%).
The month with the lowest relative humidity is October (73%).
Average rainfall in September
Aspen Hill, TN
- Average rainfall in September: 2.52"
The wettest month (with the highest rainfall) is February (4.65").
The driest month (with the least rainfall) is September (2.52").
Average rainfall days in September
Aspen Hill, TN
- Average rainfall days in September: 14.1 days
The month with the highest number of rainy days is July (20.3 days).
The month with the least rainy days is November (10.5 days).
Average snowfall in September
Aspen Hill, TN
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.79").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Aspen Hill, TN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (3.5 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
Aspen Hill, TN
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is June (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days in September
Aspen Hill, TN
- Average sunshine days in September: 14.5 days
The month with the most sunshine days is October (17.8 days).
The month with the least sunshine days is July (9.4 days).
Average UV index in September
Aspen Hill, TN
- Average UV index in September: 5
The months with the highest UV index are May, June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 2).
Average cloud cover in September
Aspen Hill, TN
- Average cloud cover in September: 31
The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is June (Cloud cover 30).
Average visibility in September
Aspen Hill, TN
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Aspen Hill, Tennessee, USA
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