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
The onset of September notes an average high-temperature of a still warm 79.9°F (26.6°C), subtly shifted from August's 84.9°F (29.4°C). Old Shawneetown records an average nighttime low of 60.8°F (16°C) in September.Humidity
The average relative humidity in September is 73%.Rainfall
The month with the least rainfall in Old Shawneetown, Illinois, is September, when the rain falls for 10.8 days and typically collects 1.14" (29mm) of precipitation.Snowfall
May through October are months without snowfall in Old Shawneetown.Daylight
The average length of the day in September is 12h and 25min.On the first day of September in Old Shawneetown, sunrise is at 6:23 am and sunset at 7:21 pm. On the last day of the month, sunrise is at 6:47 am and sunset at 6:36 pm CDT.
Sunshine
The average sunshine in September in Old Shawneetown is 9.2h.UV index
In September, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: During September, 5 as the daily maximum UV index converts into the following advice:
Heed the precautions - Protecting the skin and eyes from damage is compulsory. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.
Frequently asked questions
What are September temperatures in Old Shawneetown?
What is the average humidity in September in Old Shawneetown?
What is the driest month in Old Shawneetown?
How many days does it rain in September in Old Shawneetown?
When it does not snow in Old Shawneetown?
What is the average length of the day in September in Old Shawneetown?
What time are sunrise and sunset in September in Old Shawneetown?
How many hours of sunshine does Old Shawneetown have in September?
What is the UV index reading in September in Old Shawneetown?
Average temperature in September
Old Shawneetown, IL
- Average high temperature in September: 79.9°F
The warmest month (with the highest average high temperature) is July (86.2°F).
The month with the lowest average high temperature is January (39.7°F).
- Average low temperature in September: 60.8°F
The month with the highest average low temperature is July (68.4°F).
The coldest month (with the lowest average low temperature) is January (26.8°F).
Average pressure in September
Old Shawneetown, IL
- Average pressure in September: 30.03"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in September
Old Shawneetown, IL
- Average wind speed in September: 6.5mph
The windiest month (with the highest average wind speed) is February (9.8mph).
The calmest months (with the lowest average wind speed) are July and August (5.8mph).
Average humidity in September
Old Shawneetown, IL
- Average humidity in September: 73%
The month with the highest relative humidity is May (80%).
The month with the lowest relative humidity is October (70%).
Average rainfall in September
Old Shawneetown, IL
- Average rainfall in September: 1.14"
The wettest month (with the highest rainfall) is April (3.27").
The driest month (with the least rainfall) is September (1.14").
Average rainfall days in September
Old Shawneetown, IL
- Average rainfall days in September: 10.8 days
The month with the highest number of rainy days is May (16.7 days).
The month with the least rainy days is November (9 days).
Average snowfall in September
Old Shawneetown, IL
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.87").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Old Shawneetown, IL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (4.8 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
Old Shawneetown, IL
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in September: 9h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).
Average sunshine days in September
Old Shawneetown, IL
- Average sunshine days in September: 17 days
The month with the most sunshine days is October (20.5 days).
The month with the least sunshine days is May (11.2 days).
Average UV index in September
Old Shawneetown, IL
- 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 and December (UV index 2).
Average cloud cover in September
Old Shawneetown, IL
- Average cloud cover in September: 28
The month with the most cloud cover is January (Cloud cover 51).
The month with the least cloud cover is June (Cloud cover 27).
Average visibility in September
Old Shawneetown, IL
- 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).
Old Shawneetown, Illinois, USA
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