The highest day temperature in July 2026 was 89°F. The lowest night temperature was 65°F. The average values for day and night temperatures during July were 78.9°F и 73.0°F respectivly.

The average sea surface temperature in July 2026 for Chicago was 75.3°F. The maximum and minimum values were 67.8°F and 82.0°F respectively.

Most of the days in July are sunny but you can also expect cloudy and gloomy days.

Precipitation total in July for Chicago is 3.1 in. It makes july one of the most rainy months of the year.

The average wind speed in July is 8.2 mph. It makes July the most windless month of the year for Chicago.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Chicago in July is 10.1 hours.