September weather forecastNew Lenox, IL
September
Weather in September
September, the first month of the autumn in New Lenox, is also a moderately hot month, with an average temperature ranging between min 57°F (13.9°C) and max 74.3°F (23.5°C).Temperature
September's arrival comes with a mild decrease in the average high-temperature, moving subtly from a moderately hot 80.2°F (26.8°C) in August to a still warm 74.3°F (23.5°C). In New Lenox, September's nights observe an average temperature dip to a refreshing 57°F (13.9°C).Humidity
In September, the average relative humidity in New Lenox is 77%.Rainfall
In New Lenox, in September, it is raining for 13.2 days, with typically 2.52" (64mm) of accumulated precipitation. Throughout the year, in New Lenox, there are 149.8 rainfall days, and 31.26" (794mm) of precipitation is accumulated.Snowfall
May through September are months without snowfall in New Lenox, Illinois.Daylight
The average length of the day in September in New Lenox is 12h and 28min.On the first day of September, sunrise is at 6:18 am and sunset at 7:24 pm. On the last day of the month, sunrise is at 6:48 am and sunset at 6:34 pm CDT.
Sunshine
The average sunshine in September is 8.3h.UV index
The average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for the average person.Note: The maximum UV index of 4 during September leads to these instructions:
Ensure safety - Recommendations to avert sunburn are presented. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
New Lenox, IL
- Average high temperature in September: 74.3°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (29.3°F).
- Average low temperature in September: 57°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (17.4°F).
Average pressure in September
New Lenox, 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
New Lenox, IL
- Average wind speed in September: 7mph
The windiest month (with the highest average wind speed) is January (9.7mph).
The calmest month (with the lowest average wind speed) is August (6mph).
Average humidity in September
New Lenox, IL
- Average humidity in September: 77%
The month with the highest relative humidity is February (83%).
The month with the lowest relative humidity is October (73%).
Average rainfall in September
New Lenox, IL
- Average rainfall in September: 2.52"
The wettest month (with the highest rainfall) is May (4.21").
The driest months (with the least rainfall) are February and December (1.61").
Average rainfall days in September
New Lenox, IL
- Average rainfall days in September: 13.2 days
The months with the highest number of rainy days are June and July (17.3 days).
The month with the least rainy days is February (5.3 days).
Average snowfall in September
New Lenox, IL
- Average snowfall in September: 0"
The month with the highest snowfall is January (4.53").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
New Lenox, IL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (12.3 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
New Lenox, 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 12min).
- Average sunshine in September: 8h and 18min
The month with the most sunshine is August (Average sunshine: 9h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in September
New Lenox, IL
- Average sunshine days in September: 15 days
The month with the most sunshine days is November (17.1 days).
The month with the least sunshine days is April (10.7 days).
Average UV index in September
New Lenox, IL
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in September
New Lenox, IL
- Average cloud cover in September: 35
The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility in September
New Lenox, IL
- Average visibility in September: 6mi
The months with the highest visibility are March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, February, July and August (5mi).
