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
Fairmount marks the onset of September with an average high-temperature of a still moderately hot 76.1°F (24.5°C), subtly divergent from August's 80.6°F (27°C). Fairmount temperatures generally rest at a low of 57.7°F (14.3°C) during the September nights.Humidity
In September, the average relative humidity is 77%.Rainfall
February and September are months with the least rain in Fairmount when the rain falls for 12.5 days and typically aggregates up to 1.38" (35mm) of rain.Snowfall
In Fairmount, snow does not fall in May through October.Daylight
The average length of the day in September in Fairmount is 12h and 26min.On the first day of the month, sunrise is at 6:19 am and sunset at 7:22 pm. On the last day of September, sunrise is at 6:47 am and sunset at 6:34 pm CDT.
Sunshine
In September, the average sunshine is 8.8h.UV index
The average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for average individuals.Note: The maximum daily UV index of 5 during September translates into the following directions:
Exercise prevention - Warding off sunburn is urged. Direct Sun exposure should be minimized especially during midday when radiation is most intense. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.
Frequently asked questions
What is the temperature in September in Fairmount?
What is the average humidity in September in Fairmount?
What is the driest month in Fairmount?
How many days does it rain in September in Fairmount?
When it does not snow in Fairmount?
How many hours of daylight does Fairmount have in September?
When are sunrise and sunset in September in Fairmount?
How many hours of sunshine does Fairmount have in September?
What is the UV index intensity in September in Fairmount?
Average temperature in September
Fairmount, IL
- Average high temperature in September: 76.1°F
The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (31.6°F).
- Average low temperature in September: 57.7°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (20.5°F).
Average pressure in September
Fairmount, IL
- Average pressure in September: 30.03"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Fairmount, IL
- Average wind speed in September: 7.1mph
The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest months (with the lowest average wind speed) are July and August (6.2mph).
Average humidity in September
Fairmount, IL
- Average humidity in September: 77%
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (72%).
Average rainfall in September
Fairmount, IL
- Average rainfall in September: 1.38"
The wettest month (with the highest rainfall) is April (3.23").
The driest months (with the least rainfall) are February and September (1.38").
Average rainfall days in September
Fairmount, IL
- Average rainfall days in September: 12.5 days
The month with the highest number of rainy days is May (18 days).
The month with the least rainy days is February (6.6 days).
Average snowfall in September
Fairmount, IL
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.64").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Fairmount, IL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (10.6 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
Fairmount, 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: 8h and 5min
The month with the most sunshine is June (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in September
Fairmount, IL
- Average sunshine days in September: 15.2 days
The month with the most sunshine days is November (18 days).
The month with the least sunshine days is July (9.5 days).
Average UV index in September
Fairmount, 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
Fairmount, IL
- Average cloud cover in September: 32
The month with the most cloud cover is January (Cloud cover 58).
The months with the least cloud cover are June, August and September (Cloud cover 32).
Average visibility in September
Fairmount, 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).
Fairmount, Illinois, USA
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