Temperatures in October
It's pleasantly warm in October in Illinois with an average temperature of 19°C. Temperatures this month range from a low of 11°C to a high of 25°C. At night, you can expect temperatures between 3°C and 15°C.
Max and Min Temperatures per Day
This chart shows the daily maximum and minimum temperatures in degrees Celsius for Illinois in October. The red line indicates the max temperatures, and the blue line shows the minimums.
Start of October
The month of October starts in Illinois with warm temperatures, averaging around 23°C during the day and nights close to 13°C. A few showers might pop up in the first days of the month, but the weather remains mostly sunny and dry.
Mid-October
By mid-October, the average daytime temperature drops to around 19°C, with nights close to 8°C. There might be a few showers during this period, but plenty of dry days with sunshine too.
End of October
By the end of October, the average daytime temperature in Illinois will be around 16°C, with nights close to 7°C. There’s regular precipitation, but with a bit of luck, you’ll also get some dry and sunny days.
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Precipitation in October
In October, there is an average of 94 mm of precipitation, spread over 9 days. Of the total precipitation, about 0,6 cm falls as snow in October. The wind speed is around 4 Bft, mostly coming from the South.
The average precipitation chance is 30% per day this month. Though it seems pretty low, the weather’s variable. Some days have higher and others lower precipitation chances, which lowers the average.
Precipitation Chance
This chart shows the daily precipitation chance (in percentages) in October for Illinois. 0% means it never rained on that day in the past 10 years, and 100% means it rained every day. All values in between represent the average chance of precipitation on that day.
Illinois in October |
UK | ||
|---|---|---|---|
 Average Temperature |
19°C | 15°C | |
 High Temp |
25°C | 17°C | |
| Low Temp |
11°C | 13°C | |
 Total Precipitation |
94 mm | 115 mm | |
| Rainy Days |
9 days | 14 days | |
 Total Snowfall |
0,6 cm | 0 cm | |
| Snowy Days |
1 day | 0 days | |
September
UV index
The UV index is a maximum of 2 this month. That's a low value on the intensity scale of 1 to 11. The risk of sunburn is minimal at this time.
Is October a good time to visit Illinois?
Want nice weather? Then October is a great time to be in Illinois. You’ll have pleasant temperatures and not too much rain this month.
Check out the climate of Illinois for all months and discover the best travel time
The climate of Illinois is based on weather data from . Other spots, like New York City, Miami or Los Angeles, might have different weather. You can check out all destinations in Illinois for a full picture of the climate.
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Daily Temperature in October in Illinois
This chart shows the average daily temperatures, both day and night, for each day in October in Illinois, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.
Daily Precipitation in October in Illinois
The chart below shows the average daily precipitation in October for Illinois, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for October, you can expect around 9 days of rain in Illinois.
Daily Snowfall in October in Illinois
This chart shows the average daily snowfall in October in Illinois, measured in centimetres. The bottom of the chart shows the days of the month. The data is based on historical measurements and gives an idea of the average snowfall in October.
Daily UV Index in October in Illinois
This chart shows the average daily UV index in October in Illinois, 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.
Temperature in October in Illinois Over the Years
This chart shows the average temperature in October in Illinois, measured in degrees Celsius, over the past years.
Total Precipitation in October in Illinois Over the Years
This chart shows the average precipitation in October in Illinois, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Snowfall in October in Illinois per year
This chart shows the average snowfall in October in Illinois, measured in centimetres, over the past years.
Daily climate in October for Illinois
Click on a specific day in October for detailed info on the typical weather on that day in Illinois. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in October in Illinois
Have you been to Illinois in October?
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Average Weather in Illinois by Month
Click on a month below to see detailed weather info for Illinois. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
