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
As August transitions into September, Lake Summerset sees a gentle drop in the average high-temperature, transitioning from a moderately hot 77.7°F (25.4°C) to a pleasant 72°F (22.2°C). In the month of September, Lake Summerset records a consistent average low-temperature of 52.9°F (11.6°C).Humidity
In September, the average relative humidity is 81%.Rainfall
In Lake Summerset, in September, it is raining for 8.1 days, with typically 0.71" (18mm) of accumulated precipitation. In Lake Summerset, during the entire year, the rain falls for 90.4 days and collects up to 7.09" (180mm) of precipitation.Snowfall
May through September are months without snowfall in Lake Summerset.Daylight
In September, the average length of the day is 12h and 28min.On the first day of September, sunrise is at 6:23 am and sunset at 7:31 pm. On the last day of the month, sunrise is at 6:54 am and sunset at 6:40 pm CDT.
Sunshine
The average sunshine in September is 8.6h.UV index
In Lake Summerset, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: During September, 4 as the daily maximum UV index converts into the following advice:
Be mindful. Those with pale skin might receive burns in fewer than 30 minutes. Avoiding the Sun during its peak radiation time around midday is a healthy practice. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
Does it snow in September?
What is the average length of the day in September?
What time are sunrise and sunset in September?
How long on average sun shines in September?
What is the UV index reading in September?
Average temperature in September
Lake Summerset, IL
- Average high temperature in September: 72°F
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (24.8°F).
- Average low temperature in September: 52.9°F
The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is January (12.7°F).
Average pressure in September
Lake Summerset, IL
- Average pressure in September: 30.03"Hg
The months with the highest atmospheric pressure are January and February (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Lake Summerset, IL
- Average wind speed in September: 7.5mph
The windiest month (with the highest average wind speed) is April (10.1mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).
Average humidity in September
Lake Summerset, IL
- Average humidity in September: 81%
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is October (76%).
Average rainfall in September
Lake Summerset, IL
- Average rainfall in September: 0.71"
The wettest month (with the highest rainfall) is June (0.98").
The driest month (with the least rainfall) is January (0.31").
Average rainfall days in September
Lake Summerset, IL
- Average rainfall days in September: 8.1 days
The month with the highest number of rainy days is May (12.8 days).
The months with the least rainy days are January and February (2.4 days).
Average snowfall in September
Lake Summerset, IL
- Average snowfall in September: 0"
The month with the highest snowfall is January (1.22").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Lake Summerset, IL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (9.3 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
Lake Summerset, IL
- Average daylight in September: 12h and 3min
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 6min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The months with the least sunshine are January and February (Average sunshine: 3h and 30min).
Average sunshine days in September
Lake Summerset, IL
- Average sunshine days in September: 19.8 days
The months with the most sunshine days are November and December (22.9 days).
The month with the least sunshine days is June (13.4 days).
Average UV index in September
Lake Summerset, IL
- Average UV index in September: 4
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in September
Lake Summerset, IL
- Average cloud cover in September: 34
The month with the most cloud cover is January (Cloud cover 64).
The month with the least cloud cover is September (Cloud cover 34).
Average visibility in September
Lake Summerset, IL
- Average visibility in September: 5mi
The months with the highest visibility are February, March, April, May, June, October, November and December (6mi).
The months with the lowest visibility are January, July, August and September (5mi).
Lake Summerset, Illinois, USA
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