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 is marked by a minor decrease in temperature, transitioning from a moderately hot 85.1°F (29.5°C) in August to a still warm 79.3°F (26.3°C). The average temperature during September nights in Fairmont City, Illinois, is registered at a moderate 60.1°F (15.6°C).Humidity
In Fairmont City, the average relative humidity in September is 74%.Rainfall
In Fairmont City, in September, during 12.9 rainfall days, 2.32" (59mm) of precipitation is typically accumulated. Throughout the year, in Fairmont City, Illinois, there are 154.5 rainfall days, and 35.51" (902mm) of precipitation is accumulated.Snowfall
April through October are months without snowfall in Fairmont City.Daylight
The average length of the day in September in Fairmont City is 12h and 25min.On the first day of the month, sunrise is at 6:30 am and sunset at 7:30 pm. On the last day of September, sunrise is at 6:56 am and sunset at 6:44 pm CDT.
Sunshine
In Fairmont City, Illinois, the average sunshine in September is 9.4h.UV index
In Fairmont City, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for the average person.Note: A maximum UV index of 5 in September translates into the following recommendations:
Prioritize safety - The need to safeguard skin and eyes from harm is emphasized. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September in Fairmont City?
What is the average humidity in September in Fairmont City?
How much does it rain in Fairmont City in September?
When it does not snow in Fairmont City?
What is the average length of the day in September in Fairmont City?
When are sunrise and sunset in September in Fairmont City?
How many hours of sunshine does Fairmont City have in September?
How high is the UV index in September in Fairmont City?
Average temperature in September
Fairmont City, IL
- Average high temperature in September: 79.3°F
The warmest month (with the highest average high temperature) is July (86.4°F).
The month with the lowest average high temperature is January (37.8°F).
- Average low temperature in September: 60.1°F
The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (24.4°F).
Average pressure in September
Fairmont City, IL
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in September
Fairmont City, IL
- Average wind speed in September: 6mph
The windiest month (with the highest average wind speed) is January (9.3mph).
The calmest month (with the lowest average wind speed) is July (5.5mph).
Average humidity in September
Fairmont City, IL
- Average humidity in September: 74%
The months with the highest relative humidity are May and July (78%).
The month with the lowest relative humidity is October (71%).
Average rainfall in September
Fairmont City, IL
- Average rainfall in September: 2.32"
The wettest month (with the highest rainfall) is May (4.25").
The driest month (with the least rainfall) is February (1.89").
Average rainfall days in September
Fairmont City, IL
- Average rainfall days in September: 12.9 days
The months with the highest number of rainy days are May and July (17.5 days).
The month with the least rainy days is January (8 days).
Average snowfall in September
Fairmont City, IL
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.64").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Fairmont City, IL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (7.3 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
Fairmont City, IL
- Average daylight in September: 12h and 2min
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 30min).
- Average sunshine in September: 9h and 2min
The months with the most sunshine are June and July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).
Average sunshine days in September
Fairmont City, IL
- Average sunshine days in September: 15 days
The month with the most sunshine days is December (18.8 days).
The month with the least sunshine days is May (11.2 days).
Average UV index in September
Fairmont City, 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
Fairmont City, IL
- Average cloud cover in September: 29
The month with the most cloud cover is January (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in September
Fairmont City, 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).
Fairmont City, Illinois, USA
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