September weather forecastFranklin, IN
September
Weather in September
With September brings hints of nippy breezes interrupting the summer warmth with temperatures oscillating from 58.1°F (14.5°C) to 76.1°F (24.5°C). The landscape dresses in brilliant autumn hues, whilst daylight hours begin to shrink steadily. Even though there is a reduced occurrence of rainfall, the soil retains enough moisture for the thriving autumn flora. As the end of the month approaches, the cooling temperatures distinctly announce the onset of fall in Franklin.Temperature
September is characterized by a mild reduction in the average high-temperature, from 81.5°F (27.5°C) in August to a still warm 76.1°F (24.5°C). In Franklin, September nights cool down to an average of 58.1°F (14.5°C).Humidity
In Franklin, the average relative humidity in September is 77%.Rainfall
In Franklin, in September, during 13.5 rainfall days, 1.97" (50mm) of precipitation is typically accumulated. In Franklin, during the entire year, the rain falls for 156.3 days and collects up to 30.16" (766mm) of precipitation.Snowfall
May through September are months without snowfall.Daylight
In Franklin, the average length of the day in September is 12h and 26min.On the first day of the month, sunrise is at 7:13 am and sunset at 8:14 pm. On the last day of September, sunrise is at 7:40 am and sunset at 7:27 pm EDT.
Sunshine
In September, the average sunshine is 8.2h.UV index
In Franklin, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for average individuals.Note: An average UV index of 4 in September transforms into this advice:
Exercise care. People with light skin might get burns in fewer than 30 minutes. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Franklin, IN
- Average high temperature in September: 76.1°F
The warmest month (with the highest average high temperature) is July (82.6°F).
The month with the lowest average high temperature is January (34.3°F).
- Average low temperature in September: 58.1°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 (21.9°F).
Average pressure in September
Franklin, IN
- Average pressure in September: 30.03"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Franklin, IN
- Average wind speed in September: 6.3mph
The windiest month (with the highest average wind speed) is February (9.5mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).
Average humidity in September
Franklin, IN
- Average humidity in September: 77%
The months with the highest relative humidity are July and December (82%).
The month with the lowest relative humidity is October (74%).
Average rainfall in September
Franklin, IN
- Average rainfall in September: 1.97"
The wettest month (with the highest rainfall) is May (3.7").
The driest month (with the least rainfall) is February (1.85").
Average rainfall days in September
Franklin, IN
- Average rainfall days in September: 13.5 days
The month with the highest number of rainy days is May (17.9 days).
The month with the least rainy days is February (7.9 days).
Average snowfall in September
Franklin, IN
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.28").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Franklin, IN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (9.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Franklin, IN
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in September: 8h and 12min
The months with the most sunshine are June and July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in September
Franklin, IN
- Average sunshine days in September: 14.3 days
The month with the most sunshine days is November (17.2 days).
The month with the least sunshine days is May (10.7 days).
Average UV index in September
Franklin, IN
- Average UV index in September: 4
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, October, November and December (UV index 2).
Average cloud cover in September
Franklin, IN
- Average cloud cover in September: 34
The month with the most cloud cover is January (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in September
Franklin, IN
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
