Chicago

Illinois Weather in October

Average temperatures, rainfall, sunshine and the best places to visit in Illinois, the United States of America in October.

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Chicago Schaumburg Rosemont Joliet

Considering a trip to Illinois, the United States of America this October and wondering about the expected weather conditions? Find all the crucial information you need right here, addressing your question:

What to Expect in Illinois in October

Illinois, the United States of America 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 (57°F) and pleasant in Metropolis at 21°C (70°F). As night falls, temperatures generally drop to 8°C (46°F) in Metropolis and 3°C (37°F) in Roscoe.

To explore the conditions in Illinois, the United States of America in more detail, check the map below.

Precipitation

In October, precipitation varies across different areas. From moderate rainfall in Rochelle with an average of 67 mm (2.6 in) to high rainfall in Roscoe with 143 mm (5.6 in).

Average sunshine

Most destinations offer generous amounts of sunshine this October. For example, Chicago gets approximately 195 hours of sunlight, perfect for anyone wanting bright, sunny days.

Explore Illinois by month

Pick a month to see the average temperature, rainfall and sunshine in Illinois — and find the best time to visit. (based on Chicago)

January-1°C (30°F) February0°C (32°F) March8°C (46°F) April15°C (59°F) May21°C (70°F) June26°C (79°F) This monthJuly29°C (84°F) August28°C (82°F) September24°C (75°F) October17°C (63°F) November9°C (48°F) December3°C (37°F)
Best Time to Visit Illinois →

Best Places to Visit in Illinois in October

Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across Illinois.

Conditions Temperatures Precipitation
perfect weather
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

Popular Destinations in Illinois

What is the weather like in October for some of the most popular destinations in Illinois, the United States of America?

Temperature range in Illinois (October)

Precipitation variation in Illinois (October)

Chicago

In October Chicago generally has moderate temperatures with maximum daytime temperatures around 17°C (63°F), minimum nighttime temperatures around 7°C (45°F) and moderate monthly rainfall. So on average the conditions are tolerable that month.

« September
October
November »
September
October
November
Max temperature
24°C (75°F)
17°C (63°F)
9°C (48°F)
Min temperature
14°C (57°F)
7°C (45°F)
1°C (34°F)
Monthly sun hours
226 hours
195 hours
112 hours
Monthly rainfall
95 mm (3.7 in)
76 mm (3 in)
58 mm (2.3 in)
Monthly rainy days
9 days
12 days
8 days
Weather conditions
perfect
tolerable
poor
Climate in Chicago →

Schaumburg

In October Schaumburg generally has moderate temperatures with maximum daytime temperatures around 17°C (63°F), minimum nighttime temperatures around 5°C (41°F) and moderate monthly rainfall. So on average the conditions are tolerable that month.

« September
October
November »
September
October
November
Max temperature
24°C (75°F)
17°C (63°F)
9°C (48°F)
Min temperature
12°C (54°F)
5°C (41°F)
-1°C (30°F)
Monthly sun hours
226 hours
195 hours
112 hours
Monthly rainfall
100 mm (3.9 in)
74 mm (2.9 in)
57 mm (2.2 in)
Monthly rainy days
9 days
12 days
8 days
Weather conditions
pleasant
tolerable
poor
Climate in Schaumburg →

Rosemont

In October Rosemont generally has moderate temperatures with maximum daytime temperatures around 17°C (63°F), minimum nighttime temperatures around 7°C (45°F) and moderate monthly rainfall. So on average the conditions are tolerable that month.

« September
October
November »
September
October
November
Max temperature
24°C (75°F)
17°C (63°F)
10°C (50°F)
Min temperature
14°C (57°F)
7°C (45°F)
1°C (34°F)
Monthly sun hours
226 hours
195 hours
112 hours
Monthly rainfall
96 mm (3.8 in)
78 mm (3.1 in)
58 mm (2.3 in)
Monthly rainy days
9 days
11 days
8 days
Weather conditions
perfect
tolerable
poor
Climate in Rosemont →

Joliet

In October Joliet generally has moderate temperatures with maximum daytime temperatures around 17°C (63°F), minimum nighttime temperatures around 6°C (43°F) and moderate monthly rainfall. So on average the conditions are tolerable that month.

« September
October
November »
September
October
November
Max temperature
25°C (77°F)
17°C (63°F)
10°C (50°F)
Min temperature
13°C (55°F)
6°C (43°F)
0°C (32°F)
Monthly sun hours
226 hours
195 hours
112 hours
Monthly rainfall
94 mm (3.7 in)
83 mm (3.3 in)
55 mm (2.2 in)
Monthly rainy days
10 days
11 days
8 days
Weather conditions
perfect
tolerable
poor
Climate in Joliet →

Naperville

In October Naperville generally has moderate temperatures with maximum daytime temperatures around 17°C (63°F), minimum nighttime temperatures around 5°C (41°F) and moderate monthly rainfall. So on average the conditions are tolerable that month.

« September
October
November »
September
October
November
Max temperature
25°C (77°F)
17°C (63°F)
10°C (50°F)
Min temperature
12°C (54°F)
5°C (41°F)
-1°C (30°F)
Monthly sun hours
226 hours
195 hours
112 hours
Monthly rainfall
87 mm (3.4 in)
82 mm (3.2 in)
60 mm (2.4 in)
Monthly rainy days
9 days
11 days
8 days
Weather conditions
perfect
tolerable
poor
Climate in Naperville →

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

Popular cities in October

Day & night temperatures, rainfall and average weather in Illinois in October.

City Weather Day temp Night temp Rainfall
Chicago 17°C (63°F) 7°C (45°F) 76 mm (3 in)
Schaumburg 17°C (63°F) 5°C (41°F) 74 mm (2.9 in)
Rosemont 17°C (63°F) 7°C (45°F) 78 mm (3.1 in)
Joliet 17°C (63°F) 6°C (43°F) 83 mm (3.3 in)
Naperville 17°C (63°F) 5°C (41°F) 82 mm (3.2 in)
Waukegan 16°C (61°F) 6°C (43°F) 76 mm (3 in)

Illinois weather in October: frequently asked questions

What is the weather like in Illinois, the United States of America in October?

October in Illinois, the United States of America brings tolerable weather. In Chicago, daytime temperatures are typically around 17°C (63°F) and nighttime lows hover near 7°C (45°F).

What is the average temperature in Illinois, the United States of America in October?

Average temperatures in Illinois, the United States of America during October range from a nighttime low near 7°C (45°F) to a daytime high around 17°C (63°F) in Chicago.

Does Illinois, the United States of America get a lot of rain in October?

October is on the drier side in Illinois, the United States of America. Chicago averages only about 76 mm (3 in), with most days staying dry.

Is October a Good Time to Visit Illinois, the United States of America?

Given the typically tolerable weather conditions in Chicago, October might be a good time to visit Illinois, the United States of America. 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.

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.

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