September weather forecastHornsby, TN
September
Weather in September
The first month of the autumn, September, is still a warm month in Hornsby, Tennessee, with an average temperature varying between 63.5°F (17.5°C) and 83.5°F (28.6°C).Temperature
With the advent of September, Hornsby's high-temperatures adjust to a moderately hot 83.5°F (28.6°C), closely aligning with the preceding month. Hornsby records an average nighttime low-temperature of 63.5°F (17.5°C) throughout September.Heat index
The heat index value during September is calculated to be a tropical 89.6°F (32°C). One might feel worn out with persistent exposure and activity, resulting in heat cramps.In the scope of the heat index, its values resonate with shade and light wind conditions. The heat index can potentially augment by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'feels like' or 'apparent temperature', reflects the feeling of heat when considering both air temperature and humidity. Factors such as metabolic variations, being pregnant, and physical activity can impact an individual's weather perception. In direct sunlight, the heat's impact can be heightened, potentially leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it's vital to remain hydrated, particularly during prolonged physical activities.
Humidity
In September, the average relative humidity is 73%.Rainfall
The month with the least rainfall is September, when the rain falls for 14.3 days and typically collects 2.05" (52mm) of precipitation.Snowfall
In Hornsby, snow does not fall in April through October.Daylight
In Hornsby, the average length of the day in September is 12h and 23min.On the first day of the month, sunrise is at 6:28 am and sunset at 7:21 pm. On the last day of September, sunrise is at 6:49 am and sunset at 6:40 pm CDT.
Sunshine
The average sunshine in September is 9.4h.UV index
In September, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for the average person.Note: In September, a daily UV index of 5 turns into the following recommendations:
Undertake precautions - Guarding against sun damage is counselled. Minimize direct exposure to the Sun during midday when its radiation is at its peak. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Hornsby, TN
- Average high temperature in September: 83.5°F
The warmest month (with the highest average high temperature) is July (88.5°F).
The month with the lowest average high temperature is January (46.6°F).
- Average low temperature in September: 63.5°F
The month with the highest average low temperature is July (70°F).
The coldest month (with the lowest average low temperature) is January (32.5°F).
Average pressure in September
Hornsby, TN
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in September
Hornsby, TN
- Average wind speed in September: 5.6mph
The windiest month (with the highest average wind speed) is February (8.6mph).
The calmest month (with the lowest average wind speed) is July (4.9mph).
Average humidity in September
Hornsby, TN
- Average humidity in September: 73%
The month with the highest relative humidity is March (80%).
The month with the lowest relative humidity is October (72%).
Average rainfall in September
Hornsby, TN
- Average rainfall in September: 2.05"
The wettest month (with the highest rainfall) is February (4.53").
The driest month (with the least rainfall) is September (2.05").
Average rainfall days in September
Hornsby, TN
- Average rainfall days in September: 14.3 days
The month with the highest number of rainy days is July (17.5 days).
The month with the least rainy days is November (10.1 days).
Average snowfall in September
Hornsby, TN
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.83").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Hornsby, TN
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (2.2 days).
The months with the least snowfall days are April, May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Hornsby, TN
- Average daylight in September: 12h and 24min
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: 9h and 24min
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 42min).
Average sunshine days in September
Hornsby, TN
- Average sunshine days in September: 14.6 days
The month with the most sunshine days is October (19.6 days).
The month with the least sunshine days is July (11.8 days).
Average UV index in September
Hornsby, TN
- Average UV index in September: 5
The month with the highest UV index is June (UV index 7).
The month with the lowest UV index is December (UV index 2).
Average cloud cover in September
Hornsby, TN
- Average cloud cover in September: 28
The month with the most cloud cover is February (Cloud cover 50).
The months with the least cloud cover are June and September (Cloud cover 28).
Average visibility in September
Hornsby, 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).
