Illinois in october: average Weather, Temperature and Climate
Weather in Illinois in october 2025
The weather in Illinois in october comes from statistical datas on the past years. You can view the weather statistics for all the month, but also by clicking on the tabs for the beginning, the middle and the end of the month.
Average weather throughout october
good weather 3.4cm
Weather at 6am
50°F
Clear/Sunny
43% of time
20%
16%
9%
Weather at 12pm
63°F
Clear/Sunny
44% of time
23%
17%
13%
Weather at 6pm
58°F
Clear/Sunny
44% of time
23%
17%
10%
Weather at 3am
52°F
46%
21%
11%
10%
Evolution of daily average temperature and precipitation in Illinois in october
These charts show the evolution of average minimum/maximum temperatures as well as average daily precipitation volume in Illinois in october.
The climate of Illinois in october is good
The weather in october in Illinois is quite dry (with 3.3in of rainfall over 4 days). The weather's not getting better compared to the previous month since in september there is an average of 2.9in of precipitation over 5 days.
The climate is rather cold around this city the month of october, but it is bearable when dressing hot. The high seasonal norm is 65°F. The seasonal minimum is 50°F. Thus, the mean temperature average on this month of october in Illinois is 58°F. Note that these seasonal averages are in contrast with those observed in Illinois in the month of october with a maximum record of 90°F in 2021 and a minimum record of 29°F in 2010. You can hope to have about 16 days with temperatures over 65°F, or 52% of time.
Day length in Illinois in october is 11:08. The sun rises at 06:09 and sunset is at 17:17.
With good weather conditions, this month is recommended to go in this city in United States.
Seasonal average climate and temperature of Illinois in october
Check below seasonal norms These statistics are set from the weather statements earlier years of the month of october.
| October | |||||
| Outside temperature | |||||
| Average temperature | 58°F | ||||
| Highest temperature | 65°F | ||||
| Lowest temperature | 50°F | ||||
| Highest record temperature | 90°F (2021) | ||||
| Lowest record temperature | 29°F (2010) | ||||
| Number of days at +86°F | 0 day(s) (0%) | ||||
| Number of days at +65°F | 16 day(s) (52%) | ||||
| Number of days at -32°F | 1 day(s) (3%) | ||||
| Wind | |||||
| Wind speed | 21km/h | ||||
| Wind temperature | 47°F | ||||
| Precipitation (rainfall) | |||||
| Rainfall | 3.3in | ||||
| Number of days with rainfall | 4 day(s) (14%) | ||||
| Record daily rainfall | 1.9in (2012) | ||||
| Snowfall | 3.4cm | ||||
| Other climate data | |||||
| Humidity | 83% | ||||
| Visibility | 9.31km | ||||
| Cloud cover | 38% | ||||
| UV index | 4 | ||||
| Daily sunshine hours | 8 | ||||
| Sunrise and sunset | |||||
| Time of sunrise | 06:09 | ||||
| Time of sunset | 17:17 | ||||
| Length of day | 11:08 | ||||
| Our opinion about the weather in october | |||||
| Our opinion at whereandwhen.net | good | ||||
How was the weather last october?
Here is the day by day recorded weather in Illinois in october 2024:
63°F to 72°F
43°F to 72°F
45°F to 74°F
59°F to 68°F
59°F to 86°F
58°F to 76°F
40°F to 68°F
45°F to 74°F
49°F to 79°F
47°F to 77°F
52°F to 83°F
58°F to 86°F
52°F to 65°F
49°F to 56°F
38°F to 54°F
29°F to 61°F
34°F to 67°F
38°F to 70°F
43°F to 74°F
45°F to 77°F
47°F to 79°F
49°F to 76°F
52°F to 65°F
38°F to 63°F
54°F to 70°F
49°F to 63°F
43°F to 61°F
40°F to 63°F
61°F to 77°F
63°F to 74°F
56°F to 65°F
Map: other cities in the United States (USA) in october
Cities near Illinois:
| Chicago in october | good weather |
| St. Louis (Missouri) in october | good weather |
| Indianapolis in october | good weather |
| Wisconsin in october | tolerable weather |
| Missouri in october | good weather |
| Des Moines in october | tolerable weather |
| Louisville (Kentucky) in october | good weather |
| Cincinnati in october | good weather |
| Kansas City in october | good weather |
| Nashville in october | good weather |
| Detroit in october | good weather |
| Minneapolis (Minnesota) in october | tolerable weather |
Click over cities on the map for information about the weather in october.
Illinois
perfect weather
good
tolerable
bad
very bad
Weather data for Illinois in october:
Weather data for Illinois for october are derived from an average of the weather forecast since 2009 in Illinois. There is a margin of error and these forecasts are to be considered as general information only. The weather in Illinois can vary slightly from year to year, but this data should limit surprises. So you can pack your bags or check for the best time in year to go to Illinois.