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
Transitioning into September, Lebanon experiences an average high-temperature of a still moderately hot 79.2°F (26.2°C), marking a minor shift from the preceding month. During September, an average low-temperature of 59.9°F (15.5°C) is observed.Humidity
In Lebanon, the average relative humidity in September is 75%.Rainfall
In Lebanon, in September, during 9.6 rainfall days, 0.63" (16mm) of precipitation is typically accumulated. Throughout the year, there are 110.1 rainfall days, and 11.1" (282mm) of precipitation is accumulated.Snowfall
In Lebanon, snow does not fall in April through October.Daylight
In September, the average length of the day is 12h and 25min.On the first day of September in Lebanon, sunrise is at 6:29 am and sunset at 7:28 pm. On the last day of the month, sunrise is at 6:54 am and sunset at 6:43 pm CDT.
Sunshine
In Lebanon, the average sunshine in September is 9.3h.UV index
The average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: A daily high UV index of 5 in September leads to these guidelines:
Preventative actions are necessary - The mandate to avoid skin and eye damage is in place. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Boost your sun resistance with garments that are densely woven yet spacious.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Lebanon in September?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
What is the average length of the day in September in Lebanon?
What time are sunrise and sunset in September?
How long on average sun shines in September?
What is the UV index intensity in September?
Average temperature in September
Lebanon, IL
- Average high temperature in September: 79.2°F
The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (37.8°F).
- Average low temperature in September: 59.9°F
The month with the highest average low temperature is July (68°F).
The coldest month (with the lowest average low temperature) is January (24.8°F).
Average pressure in September
Lebanon, IL
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in September
Lebanon, IL
- Average wind speed in September: 6.2mph
The windiest month (with the highest average wind speed) is January (9.5mph).
The calmest month (with the lowest average wind speed) is July (5.6mph).
Average humidity in September
Lebanon, IL
- Average humidity in September: 75%
The months with the highest relative humidity are May, July and August (79%).
The month with the lowest relative humidity is October (70%).
Average rainfall in September
Lebanon, IL
- Average rainfall in September: 0.63"
The wettest month (with the highest rainfall) is May (1.5").
The driest month (with the least rainfall) is February (0.47").
Average rainfall days in September
Lebanon, IL
- Average rainfall days in September: 9.6 days
The month with the highest number of rainy days is July (13.2 days).
The month with the least rainy days is January (4.8 days).
Average snowfall in September
Lebanon, IL
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.51").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Lebanon, IL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (4.7 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Lebanon, IL
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in September: 9h and 2min
The months with the most sunshine are June and July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).
Average sunshine days in September
Lebanon, IL
- Average sunshine days in September: 18.5 days
The month with the most sunshine days is January (23.2 days).
The month with the least sunshine days is July (15.4 days).
Average UV index in September
Lebanon, IL
- Average UV index in September: 5
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Lebanon, IL
- Average cloud cover in September: 29
The month with the most cloud cover is January (Cloud cover 51).
The months with the least cloud cover are June and August (Cloud cover 28).
Average visibility in September
Lebanon, 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).
Lebanon, Illinois, USA
Weather forecast for your location
2. Allow the app to use your location