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 brings with it an average high-temperature of a still warm 77.4°F (25.2°C), showing a negligible variation from the month before. In September, the nighttime temperature in Athens lowers to an average of 58.5°F (14.7°C).Humidity
The average relative humidity in September in Athens, Illinois, is 75%.Rainfall
In Athens, Illinois, in September, it is raining for 10.2 days, with typically 2.09" (53mm) of accumulated precipitation. Throughout the year, in Athens, there are 132.4 rainfall days, and 21.89" (556mm) of precipitation is accumulated.Snowfall
May through October are months without snowfall.Daylight
In Athens, Illinois, the average length of the day in September is 12h and 26min.On the first day of the month, sunrise is at 6:27 am and sunset at 7:29 pm. On the last day of September, sunrise is at 6:54 am and sunset at 6:42 pm CDT.
Sunshine
In September, the average sunshine is 9.2h.UV index
The average daily maximum UV index in September in Athens is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: A maximum daily UV index of 5 during September morphs into the following directions:
Take precautions - Protection against skin and eye damage is obliged. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in Athens?
What is the average humidity in September in Athens?
How much does it rain in Athens in September?
When it does not snow in Athens?
How many hours of daylight does Athens have in September?
What time are sunrise and sunset in September in Athens?
How long on average sun shines in September in Athens?
What is the UV index reading in September in Athens?
Average temperature in September
Athens, IL
- Average high temperature in September: 77.4°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 (33.1°F).
- Average low temperature in September: 58.5°F
The month with the highest average low temperature is July (66°F).
The coldest month (with the lowest average low temperature) is January (20.7°F).
Average pressure in September
Athens, 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 (29.91"Hg).
Average wind speed in September
Athens, IL
- Average wind speed in September: 7.1mph
The windiest months (with the highest average wind speed) are January and April (10.4mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).
Average humidity in September
Athens, IL
- Average humidity in September: 75%
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (70%).
Average rainfall in September
Athens, IL
- Average rainfall in September: 2.09"
The wettest month (with the highest rainfall) is May (2.83").
The driest month (with the least rainfall) is January (1.06").
Average rainfall days in September
Athens, IL
- Average rainfall days in September: 10.2 days
The month with the highest number of rainy days is May (17 days).
The month with the least rainy days is February (5.6 days).
Average snowfall in September
Athens, IL
- Average snowfall in September: 0"
The month with the highest snowfall is January (2.8").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Athens, IL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (7.9 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
Athens, IL
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in September: 9h and 1min
The month with the most sunshine is June (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in September
Athens, IL
- Average sunshine days in September: 18.1 days
The month with the most sunshine days is November (20.4 days).
The month with the least sunshine days is May (11.6 days).
Average UV index in September
Athens, 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
Athens, IL
- Average cloud cover in September: 30
The month with the most cloud cover is January (Cloud cover 55).
The months with the least cloud cover are June, August and September (Cloud cover 30).
Average visibility in September
Athens, IL
- 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).
Athens, Illinois, USA
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