September weather forecastSkokie, IL
September
Weather in September
September in Skokie introduces the first signs of the impending fall season. The dropping temperatures and changing leaves mark the transition from summer to autumn. The hot summer sun softens into a mild brightness, casting a warm golden hue over the city. Despite the shift in seasons, the climate remains pleasant enough for residents to enjoy outdoor activities. Thus, September sees Skokie transitioning gracefully from summer to fall, sparked by a marked change in weather patterns.Temperature
A minor decrease in the average high-temperature is observed in Skokie during September, shifting from a moderately hot 77.7°F (25.4°C) in August to an agreeable 71.4°F (21.9°C). An average nighttime temperature of 60.8°F (16°C) is recorded during September.Humidity
In September, the average relative humidity is 74%.Rainfall
In September, in Skokie, the rain falls for 14.1 days. Throughout September, 2.4" (61mm) of precipitation is accumulated. In Skokie, during the entire year, the rain falls for 146.5 days and collects up to 26.22" (666mm) of precipitation.Snowfall
In Skokie, snow does not fall in May through September.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 7:24 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 9h.UV index
The average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: In September, an average UV index of 4 transforms into the following instructions:
Exercise caution. Those with pale skin may experience burns in less than half an hour. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Always opt for UVA and UVB-resistant sunglasses on radiant days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Skokie, IL
- Average high temperature in September: 71.4°F
The warmest month (with the highest average high temperature) is July (77.9°F).
The month with the lowest average high temperature is January (28.9°F).
- Average low temperature in September: 60.8°F
The months with the highest average low temperature are July and August (67.6°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).
Average pressure in September
Skokie, IL
- Average pressure in September: 30.03"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in September
Skokie, IL
- Average wind speed in September: 9.3mph
The windiest month (with the highest average wind speed) is January (12.2mph).
The calmest months (with the lowest average wind speed) are July and August (7.7mph).
Average humidity in September
Skokie, IL
- Average humidity in September: 74%
The month with the highest relative humidity is January (82%).
The month with the lowest relative humidity is October (72%).
Average rainfall in September
Skokie, IL
- Average rainfall in September: 2.4"
The wettest month (with the highest rainfall) is June (3.5").
The driest month (with the least rainfall) is December (0.94").
Average rainfall days in September
Skokie, IL
- Average rainfall days in September: 14.1 days
The month with the highest number of rainy days is July (17.4 days).
The month with the least rainy days is February (5.4 days).
Average snowfall in September
Skokie, IL
- Average snowfall in September: 0"
The month with the highest snowfall is January (2.56").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Skokie, IL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (11.7 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
Skokie, 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: 9h and 0min
The months with the most sunshine are July and August (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in September
Skokie, IL
- Average sunshine days in September: 12.9 days
The month with the most sunshine days is November (16.1 days).
The month with the least sunshine days is July (10.8 days).
Average UV index in September
Skokie, 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
Skokie, IL
- Average cloud cover in September: 30
The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is July (Cloud cover 27).
Average visibility in September
Skokie, 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).
