Weather in Chicago: October
 |
Average day temperature: | 60.0°F |
| Average night temperature: | 52.4°F | |
 |
Sea water temperature: | 56.9°F |
 |
Number of sunny days: | 13 days |
| Day length: | 10.4 - 11.7 hours | |
 |
Number of rainy days: | 4 days |
| Precipitation totals: | 2.4 in. | |
| more information | ||
forecast
| Chicago |
temperature
| Chicago |
Air temperature in October, °F
The highest day temperature during October of 2025 was 89°F. At the same time the lowest night temperature was 34°F. Daily and nightly averages during October were 64.0°F and 52.8°F.
Sea water temperature in Chicago in October, °F
The average sea water temperature in October of 2025 was 54.1°F. The highest and lowest sea temperatures during the month were 62.2°F and 35.2°F.
Number of sunny, partly cloudy and cloudy days in October is almost equal.
Precipitation total in October, in.
Precipitation total value in Chicago in October is 2.6 in. Other months of the year show relatively similar values.
The average wind speed value in October is 10.5 mph
This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in October is: 6.6.
Best time for vacation in Chicago
Chicago on a weather map
9 mph
9 mph
9 mph
11 mph
12 mph
12 mph
14 mph
13 mph
