Weather StoryAlmanac, microseasons, and the day's weather story.

Illinois Weather

Right now in Illinois
71°F
Overcast

Observed at Chicago (the largest city by population in Illinois, used as a state-wide proxy). For per-city forecasts, see the city grid below.

Climate at a glance

Illinois covers two distinct climate zones across 1,456 cities and towns. Predominantly humid subtropical (59% of cities), with warm-summer humid continental pockets (41%).

The state spans roughly 5.5° of latitude (37.0° N to 42.5° N), from Cairo in the south to Apple River in the north. Chicago is the largest city by population.

ZoneCities%
humid subtropical85658.8%
warm-summer humid continental60041.2%

Microseason · July 1–5 · Predominantly Southeast Subtropical

Cicadas claim the scorching afternoon

Dog-day cicadas emerge in waves, their rasp dominating every sunny hour; heat peaks above 90 degrees daily.

Read this microseason across nine climate regions → · See all 72 microseasons

Microseason content for Illinois is drawn from the Southeast Subtropical corpus (59% of the state's cities sit in this region).

Live wind & temperature across Illinois

Open the full interactive weather map

All cities in Illinois

1,456 cities & towns