September weather forecastShelbyville, KY
September
Weather in September
September introduces autumnal notes into Shelbyville's weather. The downwards trend in temperature continues from August, with daily highs averaging around 79.2°F (26.2°C). Appropriately, September ushers in the fall season, with temperatures becoming increasingly comfortable. Signs of the transitioning season become evident in the reduced daylight hours and the slowly building frequency of colder days. Rainfall maintains a steady pattern, nurturing the changing foliage of the season.Temperature
The transition into September in Shelbyville is accompanied by a slight temperature decrease, with the average high-temperature shifting from 84.9°F (29.4°C) in August to a still warm 79.2°F (26.2°C). Throughout the month of September, the average temperature dips to a moderate 59.5°F (15.3°C) at night.Humidity
August through October, with an average relative humidity of 75%, are the least humid months.Rainfall
September is the month with the least rainfall. Rain falls for 13.3 days and accumulates 1.89" (48mm) of precipitation.Snowfall
In Shelbyville, Kentucky, snow does not fall in May through October.Daylight
In September, the average length of the day is 12h and 25min.On the first day of the month, sunrise is at 7:11 am and sunset at 8:10 pm. On the last day of September, in Shelbyville, sunrise is at 7:36 am and sunset at 7:24 pm EDT.
Sunshine
In September, the average sunshine is 8.4h.UV index
In Shelbyville, Kentucky, the average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: An average maximum UV index of 5 in September leads to these recommendations:
Put precautions into practice - Protective measures against sun-induced damage are advised. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Shelbyville, KY
- Average high temperature in September: 79.2°F
The warmest month (with the highest average high temperature) is July (85.8°F).
The month with the lowest average high temperature is January (39°F).
- Average low temperature in September: 59.5°F
The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is January (25.9°F).
Average pressure in September
Shelbyville, KY
- Average pressure in September: 30.03"Hg
The months with the highest atmospheric pressure are January and November (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in September
Shelbyville, KY
- Average wind speed in September: 5.5mph
The windiest month (with the highest average wind speed) is January (8.4mph).
The calmest months (with the lowest average wind speed) are July and August (5mph).
Average humidity in September
Shelbyville, KY
- Average humidity in September: 75%
The month with the highest relative humidity is February (81%).
The months with the lowest relative humidity are August, September and October (75%).
Average rainfall in September
Shelbyville, KY
- Average rainfall in September: 1.89"
The wettest month (with the highest rainfall) is April (3.43").
The driest month (with the least rainfall) is September (1.89").
Average rainfall days in September
Shelbyville, KY
- Average rainfall days in September: 13.3 days
The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is January (9.6 days).
Average snowfall in September
Shelbyville, KY
- Average snowfall in September: 0"
The months with the highest snowfall are February and March (1.85").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Shelbyville, KY
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (6.9 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
Shelbyville, KY
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in September: 8h and 24min
The months with the most sunshine are June and July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days in September
Shelbyville, KY
- Average sunshine days in September: 15.1 days
The month with the most sunshine days is October (18.7 days).
The months with the least sunshine days are May and July (11.2 days).
Average UV index in September
Shelbyville, KY
- 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, November and December (UV index 2).
Average cloud cover in September
Shelbyville, KY
- Average cloud cover in September: 32
The month with the most cloud cover is January (Cloud cover 57).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in September
Shelbyville, KY
- Average visibility in September: 6mi
The months with the highest visibility are March, April, June, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, May and July (5mi).
