ILLINOIS CST/CDT · 102 COUNTIES · NWS OFFICIAL Regions Severe Climate About Almanac Garden
ILL 55
FORECAST ILLINOIS
Weather & Climate · The Prairie State
The Definitive Illinois Weather Portal

Every forecast in the Prairie State,
highway-clear.

Official National Weather Service forecasts, severe storms and tornadoes, lake-effect and blizzard snow, river flooding and climate — for all 102 counties, from the Wisconsin line and the Chicago lakefront to Cairo at the confluence.

Loading Illinois…
Illinois Interstates Shields Major Cities
102
Counties
1,235 ft
Charles Mound
10
Regions
Mar–Jun
Severe Season

Illinois Right Now

Services · Live conditions

Live Satellite & Radar

Imagery · squall.cloud
Loading live imagery…

Regions of Illinois

Guide · 10 zones
Zone 1 · I-90/94
Chicagoland
Chicago · Naperville · Joliet
Zone 2 · I-39/90
Northern Illinois
Rockford · DeKalb · Freeport
Zone 3 · I-74/80
Quad Cities & Northwest
Moline · Rock Island · Galesburg
Zone 4 · I-74
Illinois River Valley
Peoria · Pekin · Ottawa
Zone 5 · I-57
East Central Illinois
Champaign · Bloomington · Danville
Zone 6 · I-55/72
The Capital Region
Springfield · Decatur · Jacksonville
Zone 7 · I-172
West Central Illinois
Quincy · Macomb · Pittsfield
Zone 8 · I-64/70
Metro East
Belleville · Alton · Edwardsville
Zone 9 · I-57/70
Wabash Valley & Southeast
Effingham · Mount Vernon · Olney
Zone 10 · I-24/57
Southern Illinois
Carbondale · Marion · Cairo

The Illinois Weather Story

Alerts & Climate
Route Shield
Severe & Tornado Live
The spring and summer severe season — from the Tri-State Tornado of 1925 to Plainfield, Utica and Washington.
Services · Nov–Mar
Snow & Blizzards
Blizzards on the open prairie, lake-effect off Lake Michigan, and the ice storms that decide a downstate winter.
Services
River Flooding Soon
The Mississippi, Illinois, Ohio, Wabash and Kaskaskia — and the levees that hold them off the bottoms.
Warning
Extreme Cold Soon
Polar-vortex outbreaks and dangerous wind chills, from the Rock River valley to the Ohio.
Recreation
Heat & Humidity
Corn-sweat humidity, the urban heat island, and the memory of the 1995 Chicago heat wave.
Guide
Climate & Records
Normals, records and long-term trends for all 102 counties.

Weather Along the Interstates

Guide · Drive smart
Interstate
I-55
Chicago → Bloomington → Springfield → Metro East → Missouri
Interstate
I-57
Chicago → Kankakee → Champaign → Effingham → Marion → Cairo
Interstate
I-80
Quad Cities → LaSalle → Joliet → Indiana
Interstate
I-90
Wisconsin → Rockford → Elgin → Chicago
Interstate
I-94
Wisconsin → Chicago → Indiana
Interstate
I-74
Quad Cities → Galesburg → Peoria → Bloomington → Champaign → Danville
Interstate
I-70
Metro East → Vandalia → Effingham → Marshall → Indiana
Interstate
I-64
Metro East → Mount Vernon → Grayville → Indiana
Interstate
I-72
Missouri → Quincy → Jacksonville → Springfield → Decatur → Champaign
Interstate
I-88
Quad Cities → Dixon → DeKalb → Aurora → Chicago
Interstate
I-39
Rockford → LaSalle → Bloomington
Interstate
I-24
Marion → Metropolis → Kentucky