September weather forecastSchaumburg, IL
September
Weather in September
September marks the arrival of fall, with the average high temperature dropping to 73.4°F (23°C). Rainfall dwindles down to about 1.69" (43mm), ushering in a drier, cooler atmosphere. This month is characterized by the onset of crispy autumn weather, with the landscape changing into a palette of oranges, yellows, and browns. The changing foliage adds a distinct charm to the town, making it an enchanting time to explore the outdoors. With the blend of the warm sun and the cool breeze, September presents a delightful reprieve from the summer heat.Temperature
The shift from August to September includes a small decrease in the average high-temperature, from a moderately hot 80.2°F (26.8°C) to a still warm 73.4°F (23°C). September sees the temperature falling to a mean low of 57.6°F (14.2°C).Humidity
The average relative humidity in September is 75%.Rainfall
In Schaumburg, in September, it is raining for 12.8 days, with typically 1.69" (43mm) of accumulated precipitation. In Schaumburg, during the entire year, the rain falls for 147.4 days and collects up to 24.69" (627mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
In Schaumburg, the average length of the day in September is 12h and 28min.On the first day of September, sunrise is at 6:18 am and sunset at 7:25 pm. On the last day of the month, sunrise is at 6:49 am and sunset at 6:35 pm CDT.
Sunshine
The average sunshine in September in Schaumburg is 8.7h.UV index
In Schaumburg, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for average individuals.Note: The maximum UV index, 4 during September, leads to the following recommendations:
Take precautions. Light skin individuals may get burned in less than 30 minutes. To guard against the harmful effects of the Sun, minimize exposure during midday. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Schaumburg, IL
- Average high temperature in September: 73.4°F
The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is January (27.9°F).
- Average low temperature in September: 57.6°F
The month with the highest average low temperature is July (65.7°F).
The coldest month (with the lowest average low temperature) is January (16.5°F).
Average pressure in September
Schaumburg, IL
- Average pressure in September: 30.03"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in September
Schaumburg, IL
- Average wind speed in September: 7.2mph
The windiest month (with the highest average wind speed) is January (9.9mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).
Average humidity in September
Schaumburg, IL
- Average humidity in September: 75%
The months with the highest relative humidity are January and February (83%).
The month with the lowest relative humidity is October (73%).
Average rainfall in September
Schaumburg, IL
- Average rainfall in September: 1.69"
The wettest month (with the highest rainfall) is May (3.11").
The driest month (with the least rainfall) is December (1.14").
Average rainfall days in September
Schaumburg, IL
- Average rainfall days in September: 12.8 days
The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is February (4.9 days).
Average snowfall in September
Schaumburg, IL
- Average snowfall in September: 0"
The month with the highest snowfall is February (4.02").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Schaumburg, IL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (13.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Schaumburg, IL
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in September: 8h and 42min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in September
Schaumburg, IL
- Average sunshine days in September: 14.4 days
The month with the most sunshine days is November (17.2 days).
The month with the least sunshine days is July (10.2 days).
Average UV index in September
Schaumburg, IL
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in September
Schaumburg, IL
- Average cloud cover in September: 33
The month with the most cloud cover is January (Cloud cover 62).
The months with the least cloud cover are July, August and September (Cloud cover 33).
Average visibility in September
Schaumburg, IL
- Average visibility in September: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).
