Weather World
Ellison, IL Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Ellison Weather Forecast
| THIS AFTERNOON | TONIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | LABOR DAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT |
 |  | | | | | | |  |  | | |
| Sunny | Mostly Clear | Sunny | Mostly Clear | Sunny | Mostly Clear | Mostly Sunny | Mostly Clear | Partly Cloudy | Partly Cloudy | Mostly Sunny | Mostly Clear |
| Hi: 91°FHi: 33°C | Lo: 75°FLo: 24°C | Hi: 95°FHi: 35°C | Lo: 71°FLo: 22°C | Hi: 91°FHi: 33°C | Lo: 69°FLo: 21°C | Hi: 85°FHi: 29°C | Lo: 65°FLo: 18°C | Hi: 85°FHi: 29°C Lo: 65°FLo: 18°C | Hi: 85°FHi: 29°C Lo: 65°FLo: 18°C | Hi: 91°FHi: 33°C | Lo: 71°FLo: 22°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 246 PM CDT Thu Sep 03 2026 
Ellison Radar Loop
Use the map search tool if you want to place a location marker on the radar map...
Ellison Weather Map
Ellison Quick Facts
Ellison Forecast Discussion
Meteorlogic Glosserator
Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 217 PM CDT Thu Sep 3 2026
Key Messages
- Very hot and humid weather will continue through the end of the week and into the weekend, with peak heat index values between 100-110, especially for areas along and south of Highway 30.
- Precipitation chances will remain limited for many, with best chances north of Interstate 80 through the end of the work week.
- Temperatures and humidity will trend upwards again through the middle of next week, resulting in heat indices nearing 100. A more active pattern may also take shape, leading...