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
September's weather displays an average high-temperature of a still warm 77.2°F (25.1°C), slightly varied from August's 81.7°F (27.6°C). Shelbyville observes an average nighttime low-temperature of 58.6°F (14.8°C) during the month of September.Humidity
In September, the average relative humidity in Shelbyville is 75%.Rainfall
In Shelbyville, in September, during 9.9 rainfall days, 0.79" (20mm) of precipitation is typically accumulated. Throughout the year, there are 116.5 rainfall days, and 11.54" (293mm) of precipitation is accumulated.Snowfall
In Shelbyville, Illinois, snow does not fall in April through October.Daylight
In September, the average length of the day in Shelbyville is 12h and 26min.On the first day of September in Shelbyville, sunrise is at 6:24 am and sunset at 7:25 pm. On the last day of the month, sunrise is at 6:51 am and sunset at 6:38 pm CDT.
Sunshine
In Shelbyville, the average sunshine in September is 9h.UV index
In September, the average daily maximum UV index in Shelbyville is 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: In September, the UV index of 5 transforms into the following advice:
Prioritize safety - The need to safeguard skin and eyes from harm is emphasized. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.
Frequently asked questions
What is the temperature in September in Shelbyville?
What is the average humidity in September in Shelbyville?
How much does it rain in Shelbyville in September?
When it does not snow in Shelbyville?
What is the average length of the day in September in Shelbyville?
When is the sunrise / sunset in September in Shelbyville?
How many hours of sunshine does Shelbyville have in September?
What is the UV index intensity in September in Shelbyville?
Average temperature in September
Shelbyville, IL
- Average high temperature in September: 77.2°F
The warmest month (with the highest average high temperature) is July (82.8°F).
The month with the lowest average high temperature is January (34.3°F).
- Average low temperature in September: 58.6°F
The month with the highest average low temperature is July (66.2°F).
The coldest month (with the lowest average low temperature) is January (21.9°F).
Average pressure in September
Shelbyville, IL
- Average pressure in September: 30.03"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in September
Shelbyville, IL
- Average wind speed in September: 7mph
The windiest month (with the highest average wind speed) is January (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (6.2mph).
Average humidity in September
Shelbyville, IL
- Average humidity in September: 75%
The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is October (70%).
Average rainfall in September
Shelbyville, IL
- Average rainfall in September: 0.79"
The wettest month (with the highest rainfall) is June (1.46").
The driest month (with the least rainfall) is February (0.55").
Average rainfall days in September
Shelbyville, IL
- Average rainfall days in September: 9.9 days
The month with the highest number of rainy days is May (14.3 days).
The month with the least rainy days is February (4.9 days).
Average snowfall in September
Shelbyville, IL
- 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
Shelbyville, IL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (5.9 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Shelbyville, IL
- Average daylight in September: 12h and 2min
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: 9h and 0min
The month with the most sunshine is June (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in September
Shelbyville, IL
- Average sunshine days in September: 18.6 days
The month with the most sunshine days is December (22.1 days).
The month with the least sunshine days is June (13.5 days).
Average UV index in September
Shelbyville, IL
- Average UV index in September: 5
The months with the highest UV index are 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, IL
- Average cloud cover in September: 30
The months with the most cloud cover are January and February (Cloud cover 55).
The months with the least cloud cover are June and September (Cloud cover 30).
Average visibility in September
Shelbyville, IL
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, September, October, November and December (6mi).
The month with the lowest visibility is August (5mi).
Shelbyville, Illinois, USA
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