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Weather in October in Illinois

Thinking about venturing to Illinois this October and curious about the weather conditions to expect? This page holds all the key information you seek, responding to your question:

What is the weather like in Illinois in October?

Illinois is a region in the United States of America. October in Illinois generally has temperatures that range from mild to pleasant, with precipitation levels ranging from moderate to high.

Temperatures

During the day the temperature is mild in Roscoe at 14°C and pleasant in Metropolis at 21°C. As night falls, temperatures generally drop to 8°C in Metropolis and 3°C in Roscoe.

Precipitation

In October, precipitation varies across different areas. From moderate rainfall in Rochelle with an average of 67 mm to high rainfall in Roscoe with 143 mm.

Average sunshine

The city Chicago usually sees around 195 hours of sunlight, indicating many sunny days.

To learn more about the conditions in specific areas of Illinois in October, check out the map below. For more details on the yearly weather, visit our Illinois climate page.

Where to go in Illinois in October

Find more information for the most popular destinations in the Illinois on the map below. Click on a destination dot for more detailes.

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Legend perfect weather pleasant tolerable unpleasant poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C and 29°C and not too much precipitation (less than 90 mm a month).

Popular destinations

What is the weather like in October for the 5 most popular destinations in Illinois?

Chicago

In October Chicago generally has moderate temperatures with maximum daytime temperatures around 17°C, minimum nighttime temperatures around 7°C and moderate monthly rainfall. So on average the conditions are tolerable that month.

Chicago
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
24°C 
14°C 
226 hours 
95 mm 
9 days 
17°C 
7°C 
195 hours 
76 mm 
12 days 
9°C 
1°C 
112 hours 
58 mm 
8 days 
poor 
Climate in Chicago

Schaumburg

In October Schaumburg generally has moderate temperatures with maximum daytime temperatures around 17°C, minimum nighttime temperatures around 5°C and moderate monthly rainfall. So on average the conditions are tolerable that month.

Schaumburg
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
24°C 
12°C 
226 hours 
100 mm 
9 days 
17°C 
5°C 
195 hours 
74 mm 
12 days 
9°C 
-1°C 
112 hours 
57 mm 
8 days 
poor 
Climate in Schaumburg

Rosemont

In October Rosemont generally has moderate temperatures with maximum daytime temperatures around 17°C, minimum nighttime temperatures around 7°C and moderate monthly rainfall. So on average the conditions are tolerable that month.

Rosemont
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
24°C 
14°C 
226 hours 
96 mm 
9 days 
17°C 
7°C 
195 hours 
78 mm 
11 days 
10°C 
1°C 
112 hours 
58 mm 
8 days 
poor 
Climate in Rosemont

Joliet

In October Joliet generally has moderate temperatures with maximum daytime temperatures around 17°C, minimum nighttime temperatures around 6°C and moderate monthly rainfall. So on average the conditions are tolerable that month.

Joliet
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
25°C 
13°C 
226 hours 
94 mm 
10 days 
17°C 
6°C 
195 hours 
83 mm 
11 days 
10°C 
-0°C 
112 hours 
55 mm 
8 days 
poor 
Climate in Joliet

Naperville

In October Naperville generally has moderate temperatures with maximum daytime temperatures around 17°C, minimum nighttime temperatures around 5°C and moderate monthly rainfall. So on average the conditions are tolerable that month.

Naperville
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
25°C 
12°C 
226 hours 
87 mm 
9 days 
17°C 
5°C 
195 hours 
82 mm 
11 days 
10°C 
-1°C 
112 hours 
60 mm 
8 days 
poor 
Climate in Naperville

Is your destination not in the list? Have a look at other destinations in Illinois, in the United States of America.

Is October the best time to visit Illinois?

Given the typically tolerable weather conditions in Chicago, October might be a good time to visit Illinois. However, the weather conditions may vary depending on your destination.

Generally speaking, September provides perfect weather in Chicago. The weather in January, February, March, November and December, on the other hand, tends to be poor.

Interested in more climate information?

We have much more information about the climate in Illinois. Interested in the weather conditions in a specific month? Select the month below.

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  • Weather and climate has detailed information for every country in the world. Are you going to the United States of America? Get detailed historical weather averages for many cities in the United States of America.

    Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.