Weather World
Smithboro, IL Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Smithboro Weather Forecast
| TODAY | TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | TUESDAY | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY |
 |  |  |  | |  | | | |  | |
| Sunny | Partly Cloudy | Chance of T-Storm | Thunderstorms | Sunny | Mostly Clear | Mostly Clear | Mostly Clear | Mostly Clear | Chance of Showers | Chance of T-Storm |
| Hi: 99°FHi: 37°C | Lo: 71°FLo: 22°C | Hi: 99°FHi: 37°C | Lo: 70°FLo: 21°C | Hi: 90°FHi: 32°C | Hi: 89°FHi: 32°C Lo: 65°FLo: 18°C | Hi: 89°FHi: 32°C Lo: 65°FLo: 18°C | Hi: 99°FHi: 37°C Lo: 71°FLo: 22°C | Hi: 99°FHi: 37°C Lo: 71°FLo: 22°C | Lo: 75°FLo: 24°C | Hi: 91°FHi: 33°C |
| POP: 20% | POP: 20% | POP: 20% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 433 AM CDT Fri Sep 04 2026 
Smithboro Radar Loop
Use the map search tool if you want to place a location marker on the radar map...
Smithboro Weather Map
Smithboro Quick Facts
Smithboro Forecast Discussion
Meteorlogic Glosserator
Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 500 AM CDT Fri Sep 4 2026
Key Messages
- A late summer heatwave will continue through Saturday before temperatures cool slightly Sunday into Labor Day.
- Another period of heat and near-record breaking temperatures is forecast Tuesday into Wednesday, but it is uncertain how long the heat persists thereafter.
Aviation
/06Z TAFS THROUGH 12Z SATURDAY/... Issued at 455 AM CDT Fri Sep 4 2026
Dry and VFR flight conditions are favored to persist through the TAF period along with light winds. A few isolated showers or thunderstorms cann...