State weather
Illinois weather
Forecasts for 121 cities in Illinois with 20,000+ residents from the National Weather Service. No NWS alerts are active in Illinois.
City forecasts: snapshot of Oct 28, 1:32 AM CDT Alerts updated Oct 28, 1:15 AM CDT
| City | County | Observed | Forecast | Population |
|---|---|---|---|---|
| Chicago | Cook County | 59°F · Clear | Overnight: Mostly Cloudy, low 55°F | 2,721,308 |
| Aurora | Kane County | 55°F · Cloudy | Overnight: Partly Cloudy, low 49°F | 180,710 |
| Naperville | DuPage County | 54°F · Clear | Overnight: Partly Cloudy, low 51°F | 153,124 |
| Joliet | Will County | 52°F · Clear | Overnight: Partly Cloudy, low 51°F | 151,837 |
| Rockford | Winnebago County | 54°F · Clear | Overnight: Mostly Clear, low 51°F | 147,486 |
| Elgin | Kane County | 55°F · Cloudy | Overnight: Partly Cloudy, low 50°F | 114,701 |
| Springfield | Sangamon County | 63°F · Cloudy | Overnight: Partly Cloudy, low 54°F | 112,949 |
| Peoria | Peoria County | 61°F · Cloudy | Overnight: Mostly Cloudy, low 54°F | 111,696 |
| Champaign | Champaign County | 52°F · Mostly Cloudy | Overnight: Mostly Clear, low 52°F | 91,961 |
| Waukegan | Lake County | 52°F · Clear | Overnight: Partly Cloudy, low 51°F | 88,570 |
| Cicero | Cook County | 59°F · Clear | Overnight: Mostly Cloudy, low 55°F | 82,090 |
| Bloomington | McLean County | 55°F · Mostly Cloudy | Overnight: Partly Cloudy, low 53°F | 79,232 |
| Schaumburg | Cook County | 57°F · Clear | Overnight: Partly Cloudy, low 52°F | 77,099 |
| Evanston | Cook County | 54°F · Clear | Overnight: Partly Cloudy, low 54°F | 76,006 |
| Arlington Heights | Cook County | 54°F · Clear | Overnight: Partly Cloudy, low 52°F | 75,596 |
| Bolingbrook | Will County | 54°F · Clear | Overnight: Partly Cloudy, low 51°F | 74,756 |
| Decatur | Macon County | 54°F · Cloudy | Overnight: Partly Cloudy, low 51°F | 68,763 |
| Palatine | Cook County | 54°F · Clear | Overnight: Partly Cloudy, low 52°F | 65,951 |
| Skokie | Cook County | 57°F · Clear | Overnight: Partly Cloudy, low 54°F | 65,850 |
| Des Plaines | Cook County | 57°F · Clear | Overnight: Partly Cloudy, low 53°F | 58,832 |
| Orland Park | Cook County | 54°F · Clear | Overnight: Mostly Cloudy, low 52°F | 58,020 |
| Oak Lawn | Cook County | 59°F · Clear | Overnight: Mostly Cloudy, low 55°F | 56,531 |
| Mount Prospect | Cook County | 54°F · Clear | Overnight: Partly Cloudy, low 53°F | 55,460 |
| Berwyn | Cook County | 59°F · Clear | Overnight: Mostly Cloudy, low 55°F | 55,152 |
| Tinley Park | Cook County | 59°F · Clear | Overnight: Mostly Cloudy, low 52°F | 54,856 |
| Wheaton | DuPage County | 55°F · Cloudy | Overnight: Partly Cloudy, low 52°F | 53,741 |
| Normal | McLean County | 55°F · Mostly Cloudy | Overnight: Partly Cloudy, low 52°F | 53,304 |
| Oak Park | Cook County | 59°F · Clear | Overnight: Partly Cloudy, low 55°F | 52,947 |
| Hoffman Estates | Cook County | 54°F · Clear | Overnight: Partly Cloudy, low 51°F | 50,920 |
| Downers Grove | DuPage County | 55°F · Cloudy | Overnight: Partly Cloudy, low 53°F | 50,552 |
| Plainfield | Will County | 54°F · Clear | Overnight: Partly Cloudy, low 50°F | 48,881 |
| Glenview | Cook County | 54°F · Clear | Overnight: Partly Cloudy, low 53°F | 47,634 |
| Elmhurst | DuPage County | 57°F · Clear | Overnight: Partly Cloudy, low 54°F | 46,108 |
| Lombard | DuPage County | 57°F · Clear | Overnight: Partly Cloudy, low 53°F | 44,490 |
| Buffalo Grove | Lake County | 54°F · Clear | Overnight: Partly Cloudy, low 51°F | 43,072 |
| Moline | Rock Island County | 57°F · Clear | Overnight: Mostly Clear, low 53°F | 42,442 |
| Crystal Lake | McHenry County | 54°F · Clear | Overnight: Partly Cloudy, low 50°F | 41,513 |
| Romeoville | Will County | 54°F · Clear | Overnight: Partly Cloudy, low 51°F | 41,177 |
| Bartlett | DuPage County | 55°F · Cloudy | Overnight: Partly Cloudy, low 52°F | 40,718 |
| Belleville | St. Clair County | 50°F · Clear | Overnight: Mostly Clear, low 51°F | 40,560 |
| DeKalb | DeKalb County | 52°F · Mostly Cloudy | Overnight: Partly Cloudy, low 49°F | 40,491 |
| Urbana | Champaign County | 52°F · Mostly Cloudy | Overnight: Mostly Clear, low 51°F | 39,831 |
| Carol Stream | DuPage County | 55°F · Cloudy | Overnight: Partly Cloudy, low 52°F | 39,556 |
| Quincy | Adams County | 63°F · Cloudy | Overnight: Partly Cloudy, low 57°F | 38,786 |
| Oswego | Kendall County | 54°F · Mostly Cloudy | Overnight: Partly Cloudy, low 50°F | 38,778 |
| Park Ridge | Cook County | 57°F · Clear | Overnight: Partly Cloudy, low 54°F | 38,445 |
| Streamwood | Cook County | 55°F · Cloudy | Overnight: Partly Cloudy, low 52°F | 38,360 |
| Wheeling | Cook County | 54°F · Clear | Overnight: Partly Cloudy, low 52°F | 38,329 |
| Carpentersville | Kane County | 55°F · Cloudy | Overnight: Partly Cloudy, low 50°F | 37,144 |
| Hanover Park | Cook County | 55°F · Cloudy | Overnight: Partly Cloudy, low 52°F | 36,685 |
| Rock Island | Rock Island County | 57°F · Clear | Overnight: Partly Cloudy, low 54°F | 36,434 |
| Addison | DuPage County | 57°F · Clear | Overnight: Partly Cloudy, low 53°F | 35,728 |
| Calumet City | Cook County | 55°F · Clear | Overnight: Mostly Cloudy, low 52°F | 34,855 |
| Northbrook | Cook County | 54°F · Clear | Overnight: Partly Cloudy, low 53°F | 34,546 |
| Woodridge | DuPage County | 54°F · Clear | Overnight: Partly Cloudy, low 53°F | 34,103 |
| St. Charles | Kane County | 55°F · Cloudy | Overnight: Partly Cloudy, low 50°F | 33,482 |
| Glendale Heights | DuPage County | 55°F · Cloudy | Overnight: Partly Cloudy, low 52°F | 32,866 |
| Mundelein | Lake County | 54°F · Clear | Overnight: Partly Cloudy, low 50°F | 32,641 |
| O'Fallon | St. Clair County | 50°F · Clear | Overnight: Mostly Clear, low 51°F | 32,169 |
| Elk Grove Village | Cook County | 57°F · Clear | Overnight: Partly Cloudy, low 53°F | 31,802 |
| Pekin | Tazewell County | 61°F · Cloudy | Overnight: Partly Cloudy, low 53°F | 31,266 |
| Highland Park | Lake County | 54°F · Clear | Overnight: Partly Cloudy, low 52°F | 30,794 |
| North Chicago | Lake County | 52°F · Clear | Overnight: Partly Cloudy, low 51°F | 30,639 |
| Gurnee | Lake County | 52°F · Clear | Overnight: Partly Cloudy, low 49°F | 30,546 |
| Algonquin | McHenry County | 55°F · Cloudy | Overnight: Partly Cloudy, low 50°F | 30,539 |
| Niles | Cook County | 57°F · Clear | Overnight: Partly Cloudy, low 54°F | 29,918 |
| Galesburg | Knox County | 59°F · Cloudy | Overnight: Mostly Clear, low 52°F | 29,289 |
| Glen Ellyn | DuPage County | 55°F · Cloudy | Overnight: Partly Cloudy, low 53°F | 28,872 |
| McHenry | McHenry County | 52°F · Clear | Overnight: Partly Cloudy, low 50°F | 28,825 |
| Lake in the Hills | McHenry County | 55°F · Cloudy | Overnight: Partly Cloudy, low 50°F | 28,706 |
| Burbank | Cook County | 59°F · Clear | Overnight: Mostly Cloudy, low 55°F | 28,606 |
| Huntley | McHenry County | 52°F · Mostly Cloudy | Overnight: Partly Cloudy, low 50°F | 28,495 |
| New Lenox | Will County | 54°F · Clear | Overnight: Mostly Cloudy, low 51°F | 28,480 |
| Lansing | Cook County | 55°F · Clear | Overnight: Mostly Cloudy, low 51°F | 28,107 |
| Danville | Vermilion County | 52°F · Mostly Cloudy | Overnight: Mostly Clear, low 50°F | 27,981 |
| Wilmette | Cook County | 54°F · Clear | Overnight: Partly Cloudy, low 54°F | 27,443 |
| Round Lake Beach | Lake County | 52°F · Clear | Overnight: Partly Cloudy, low 50°F | 27,091 |
| Vernon Hills | Lake County | 54°F · Clear | Overnight: Partly Cloudy, low 50°F | 27,002 |
| Lockport | Will County | 54°F · Clear | Overnight: Mostly Cloudy, low 52°F | 26,915 |
| Granite City | Madison County | 50°F · Clear | Overnight: Mostly Clear, low 51°F | 26,854 |
| Oak Forest | Cook County | 55°F · Clear | Overnight: Mostly Cloudy, low 53°F | 26,813 |
| Edwardsville | Madison County | 51°F · Clear | Overnight: Mostly Clear, low 51°F | 26,715 |
| Batavia | Kane County | 55°F · Cloudy | Overnight: Partly Cloudy, low 50°F | 26,555 |
| Chicago Heights | Cook County | 55°F · Clear | Overnight: Mostly Cloudy, low 51°F | 26,533 |
| Yorkville | Kendall County | 54°F · Mostly Cloudy | Overnight: Partly Cloudy, low 49°F | 25,986 |
| Woodstock | McHenry County | 52°F · Mostly Cloudy | Overnight: Partly Cloudy, low 50°F | 25,892 |
| West Chicago | DuPage County | 55°F · Cloudy | Overnight: Partly Cloudy, low 50°F | 25,469 |
| Belvidere | Boone County | 54°F · Clear | Overnight: Mostly Clear, low 50°F | 25,325 |
| Alton | Madison County | 51°F · Clear | Overnight: Mostly Clear, low 52°F | 24,967 |
| South Elgin | Kane County | 55°F · Cloudy | Overnight: Partly Cloudy, low 50°F | 24,921 |
| Homer Glen | Will County | 54°F · Clear | Overnight: Mostly Cloudy, low 52°F | 24,852 |
| Zion | Lake County | 52°F · Clear | Overnight: Partly Cloudy, low 50°F | 24,583 |
| Morton Grove | Cook County | 57°F · Clear | Overnight: Partly Cloudy, low 54°F | 24,467 |
| Westmont | DuPage County | 59°F · Clear | Overnight: Partly Cloudy, low 54°F | 24,308 |
| Melrose Park | Cook County | 57°F · Clear | Overnight: Partly Cloudy, low 54°F | 23,999 |
| Collinsville | Madison County | 50°F · Clear | Overnight: Mostly Clear, low 52°F | 23,766 |
| Rolling Meadows | Cook County | 54°F · Clear | Overnight: Partly Cloudy, low 53°F | 23,732 |
| Elmwood Park | Cook County | 57°F · Clear | Overnight: Partly Cloudy, low 55°F | 23,698 |
| Loves Park | Winnebago County | 54°F · Clear | Overnight: Mostly Clear, low 51°F | 23,636 |
| Lisle | DuPage County | 55°F · Cloudy | Overnight: Partly Cloudy, low 52°F | 23,548 |
| Kankakee | Kankakee County | 52°F · Partly Cloudy | Overnight: Mostly Cloudy, low 50°F | 23,535 |
| Maywood | Cook County | 57°F · Clear | Overnight: Partly Cloudy, low 54°F | 23,364 |
| Freeport | Stephenson County | 56°F · Clear | Overnight: Clear, low 49°F | 23,140 |
| Roselle | DuPage County | 57°F · Clear | Overnight: Partly Cloudy, low 52°F | 22,871 |
| Machesney Park | Winnebago County | 54°F · Clear | Overnight: Mostly Clear, low 51°F | 22,839 |
| Bloomingdale | DuPage County | 57°F · Clear | Overnight: Partly Cloudy, low 53°F | 22,622 |
| Carbondale | Jackson County | 48°F · Clear | Overnight: Mostly Clear, low 48°F | 22,223 |
| East Peoria | Tazewell County | 61°F · Cloudy | Overnight: Partly Cloudy, low 53°F | 22,024 |
| Villa Park | DuPage County | 57°F · Clear | Overnight: Partly Cloudy, low 54°F | 22,020 |
| Darien | DuPage County | 54°F · Clear | Overnight: Partly Cloudy, low 53°F | 22,015 |
| Montgomery | Kendall County | 54°F · Mostly Cloudy | Overnight: Partly Cloudy, low 49°F | 21,957 |
| Blue Island | Cook County | 59°F · Clear | Overnight: Mostly Cloudy, low 54°F | 21,805 |
| Grayslake | Lake County | 52°F · Clear | Overnight: Partly Cloudy, low 50°F | 21,262 |
| Geneva | Kane County | 55°F · Cloudy | Overnight: Partly Cloudy, low 50°F | 21,168 |
| Frankfort | Will County | 54°F · Clear | Overnight: Mostly Cloudy, low 52°F | 21,160 |
| Park Forest | Cook County | 55°F · Clear | Overnight: Mostly Cloudy, low 51°F | 21,016 |
| East Moline | Rock Island County | 57°F · Clear | Overnight: Mostly Clear, low 50°F | 20,995 |
| South Holland | Cook County | 55°F · Clear | Overnight: Mostly Cloudy, low 52°F | 20,775 |
| Dolton | Cook County | 55°F · Clear | Overnight: Mostly Cloudy, low 53°F | 20,697 |
| Libertyville | Lake County | 52°F · Clear | Overnight: Partly Cloudy, low 50°F | 20,643 |
| Crest Hill | Will County | 54°F · Clear | Overnight: Mostly Cloudy, low 51°F | 20,223 |
Observed temperatures come from the NWS station nearest each city at the time of the snapshot. Open a city for current conditions, the next 24 hours and the 7-day forecast, loaded live from api.weather.gov.
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Active alerts in Illinois
No National Weather Service alerts are active in Illinois right now.
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Sources
- Forecasts, observations and alerts: National Weather Service API (api.weather.gov/alerts/active?area=IL).
- Cities and population: U.S. Census Bureau, Vintage 2024 population estimates.
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