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
September is characterized by a slight reduction in average high-temperature, easing from 80.4°F (26.9°C) in August to a still warm 74.5°F (23.6°C). South Chicago Heights, during the month of September, experiences an average low-temperature of 57.6°F (14.2°C).Humidity
In September, the average relative humidity in South Chicago Heights is 76%.Rainfall
In September, in South Chicago Heights, the rain falls for 14.5 days. Throughout September, 2.56" (65mm) of precipitation is accumulated. In South Chicago Heights, Illinois, during the entire year, the rain falls for 167.4 days and collects up to 35" (889mm) of precipitation.Snowfall
May through September are months without snowfall in South Chicago Heights.Daylight
The average length of the day in September is 12h and 28min.On the first day of September, sunrise is at 6:17 am and sunset at 7:23 pm. On the last day of the month, sunrise is at 6:47 am and sunset at 6:33 pm CDT.
Sunshine
In September, the average sunshine is 8.5h.UV index
In South Chicago Heights, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for average individuals.Note: The maximum UV index, 4 during September, leads to the following recommendations:
Preventative actions are necessary - Recommendations to ward off sunburn are given. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.
Frequently asked questions
What are September temperatures in South Chicago Heights?
What is the average humidity in September in South Chicago Heights?
How much does it rain in South Chicago Heights in September?
When it does not snow in South Chicago Heights?
Does it snow in South Chicago Heights in September?
What is the average length of the day in September in South Chicago Heights?
When are sunrise and sunset in September in South Chicago Heights?
How many hours of sunshine does South Chicago Heights have in September?
What is the UV index reading in September in South Chicago Heights?
Average temperature in September
South Chicago Heights, 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
South Chicago Heights, 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
South Chicago Heights, 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
South Chicago Heights, 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
South Chicago Heights, 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
South Chicago Heights, 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
South Chicago Heights, 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
South Chicago Heights, 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
South Chicago Heights, 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
South Chicago Heights, 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
South Chicago Heights, 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
South Chicago Heights, 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
South Chicago Heights, 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).
South Chicago Heights, Illinois, USA
Weather forecast for your location
2. Allow the app to use your location
