Weathermondo.com
United StatesThe weather in September in Island Lake
It's warm in September in Island Lake with an average temperature of 24°C. Temperatures this month range from a low of 20°C to a high of 28°C. At night, you can expect temperatures between 11°C and 19°C.
Looking for sun? September isn’t a good month to be in Island Lake. The temperature is nice, but there’s too much chance of rain.
Average temperatures and precipitation
This chart shows the average daily maximum and minimum temperatures (in degrees Celsius) and precipitation (in millimeters) in September for Island Lake, Illinois. A low precipitation value usually indicates little to no rainfall on that day in recent years, while a higher value suggests more frequent rainfall.
Temperature records
With 34°C in 2023, Island Lake reached the highest temperature in September over the past 10 years. The lowest daytime temperature in this month was 12°C in 2014. The extreme nighttime temperatures ranged from a lowest recorded value of 3°C to a highest value of 24°C.
Rainfall amount
In September, there is an average of 132 mm of precipitation, spread over 15 days. The wind speed is around 4 Bft, mostly coming from the South.
Daily weather in September for Island Lake
Click on any day in September to get detailed info about the usual weather on that day in Island Lake. Check out the historical temperatures and precipitation over the past 10 years on this day.
September weather comparison
| Island Lake | New York | |
|---|---|---|
| Average temperature | 24°C | 27°C |
| Max. temperature | 28°C | 31°C |
| Min. temperature | 11°C | -5°C |
| Total precipitation | 132 mm | 57 mm |
| Rainy days | 15 days | 9 days |
Start of September
The month of September starts in Island Lake with warm temps, averaging around 26°C during the day and nights around 17°C.
Mid September
By mid-September, daytime temps drop to around 25°C, with nights around 15°C. During this part of the month, you might see regular precipitation, but there will also be some sunny days.
End of September
By the end of September, the average daytime temperature in Island Lake is around 24°C, while nighttime temps are about 14°C. Expect regular precipitation, but if you’re lucky, you’ll also get some dry and sunny days.
UV index
The UV index is a maximum of 7 this month. That's a moderate to high value on the intensity scale of 1 to 11. Unprotected skin can burn within 15-25 minutes.
Check out the climate of Island Lake for all months and discover the best travel time
Temperature charts
These charts show the average temperatures in September in Island Lake, Illinois. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in September in Island Lake
Temperature in September in Island Lake over the years
Precipitation charts
These charts show the average amount of precipitation in September in Island Lake, Illinois. Precipitation is always measured as water, even when it falls as snow or hail The amount of precipitation is displayed in millimeters, while snowfall is shown in centimeters.
Daily Precipitation in September in Island Lake
Total precipitation in September in Island Lake over the years
Daily UV index in September in Island Lake
This chart shows the average daily UV index in September in Island Lake, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Weather experiences in September in Island Lake
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Average weather in Island Lake by month
Click on a month below to see detailed weather info for Island Lake. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.