September weather forecastBraidwood, IL
September
Weather in September
The first month of the autumn, September, is also a moderately hot month in Braidwood, Illinois, with an average temperature ranging between max 74.8°F (23.8°C) and min 56.8°F (13.8°C).Temperature
September denotes a minimal variation in the average high-temperature to a still moderately hot 74.8°F (23.8°C) from August's 79.7°F (26.5°C). In Braidwood, an average nighttime temperature of 56.8°F (13.8°C) is expected during September.Humidity
In Braidwood, Illinois, the average relative humidity in September is 77%.Rainfall
In September, the rain falls for 13.2 days. Throughout September, 2.52" (64mm) of precipitation is accumulated. Throughout the year, in Braidwood, there are 160.4 rainfall days, and 33.5" (851mm) of precipitation is accumulated.Snowfall
May through September are months without snowfall in Braidwood.Daylight
The average length of the day in September is 12h and 28min.On the first day of September, sunrise is at 6:20 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
In Braidwood, Illinois, the average sunshine in September is 8.7h.UV index
The average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: The average daily UV index of 5 in September transforms into the following instructions:
Exercise caution. Those with pale skin may experience burns in less than half an hour. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Braidwood, IL
- Average high temperature in September: 74.8°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (29.7°F).
- Average low temperature in September: 56.8°F
The month with the highest average low temperature is July (64.6°F).
The coldest month (with the lowest average low temperature) is January (17.8°F).
Average pressure in September
Braidwood, IL
- Average pressure in September: 30.03"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in September
Braidwood, IL
- Average wind speed in September: 7mph
The windiest months (with the highest average wind speed) are January and April (9.9mph).
The calmest month (with the lowest average wind speed) is August (6mph).
Average humidity in September
Braidwood, 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
Braidwood, IL
- Average rainfall in September: 2.52"
The wettest month (with the highest rainfall) is May (4.57").
The driest months (with the least rainfall) are February and November (1.69").
Average rainfall days in September
Braidwood, IL
- Average rainfall days in September: 13.2 days
The month with the highest number of rainy days is May (19.2 days).
The month with the least rainy days is January (5.8 days).
Average snowfall in September
Braidwood, IL
- Average snowfall in September: 0"
The month with the highest snowfall is February (4.29").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Braidwood, 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
Braidwood, IL
- Average daylight in September: 12h and 30min
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 18min).
- Average sunshine in September: 8h and 42min
The months with the most sunshine are June, July and August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in September
Braidwood, IL
- Average sunshine days in September: 14 days
The month with the most sunshine days is November (17.2 days).
The month with the least sunshine days is July (8.6 days).
Average UV index in September
Braidwood, IL
- Average UV index in September: 5
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
Braidwood, IL
- Average cloud cover in September: 33
The month with the most cloud cover is January (Cloud cover 60).
The months with the least cloud cover are August and September (Cloud cover 33).
Average visibility in September
Braidwood, IL
- Average visibility in September: 6mi
The months with the highest visibility are January, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are February, July and August (5mi).
