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
University Park's September weather features a light decline in high-temperatures, reducing from 80.4°F (26.9°C) in August to a still moderately hot 74.5°F (23.6°C). During the September nights, an average temperature of 57.6°F (14.2°C) is observed in University Park.Humidity
In September, the average relative humidity is 76%.Rainfall
In September, the rain falls for 14.5 days. Throughout September, 2.56" (65mm) of precipitation is accumulated. Throughout the year, there are 167.4 rainfall days, and 35" (889mm) of precipitation is accumulated.Snowfall
May through September are months without snowfall.Daylight
In September, the average length of the day is 12h and 28min.On the first day of the month, sunrise is at 6:17 am and sunset at 7:23 pm. On the last day of September, in University Park, sunrise is at 6:47 am and sunset at 6:33 pm CDT.
Sunshine
In University Park, the average sunshine in September is 8.5h.UV index
In University Park, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for average individuals.Note: The average daily UV index of 4 in September transforms into the following instructions:
Act with care - The need to guard against sun damage is communicated. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Tightly woven clothing, when worn loosely, shields effectively against the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September?
What is the average humidity in September?
How many days does it rain in September in University Park?
When it does not snow?
Does it snow in September?
What is the average length of the day in September?
When is the sunrise / sunset in September?
How long on average sun shines in September?
How high is the UV index in September?
Average temperature in September
University Park, IL
- Average high temperature in September: 74.5°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (29.7°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 (18.9°F).
Average pressure in September
University Park, 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
University Park, IL
- Average wind speed in September: 7.1mph
The windiest month (with the highest average wind speed) is January (10mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).
Average humidity in September
University Park, IL
- Average humidity in September: 76%
The month with the highest relative humidity is February (83%).
The month with the lowest relative humidity is October (73%).
Average rainfall in September
University Park, IL
- Average rainfall in September: 2.56"
The wettest month (with the highest rainfall) is May (4.53").
The driest month (with the least rainfall) is November (1.81").
Average rainfall days in September
University Park, IL
- Average rainfall days in September: 14.5 days
The month with the highest number of rainy days is July (20.1 days).
The month with the least rainy days is February (6.2 days).
Average snowfall in September
University Park, IL
- Average snowfall in September: 0"
The month with the highest snowfall is February (5.35").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
University Park, IL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (13.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
University Park, IL
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in September: 8h and 3min
The month with the most sunshine is August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in September
University Park, IL
- Average sunshine days in September: 12.7 days
The month with the most sunshine days is November (16.3 days).
The month with the least sunshine days is July (7.8 days).
Average UV index in September
University Park, IL
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
University Park, IL
- Average cloud cover in September: 34
The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in September
University Park, IL
- Average visibility in September: 6mi
The months with the highest visibility are March, April, May, June, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February and July (5mi).
University Park, Illinois, USA
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