Dewey, IL Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Dewey Weather Forecast
| TODAY | TONIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT |
| Sunny | Partly Cloudy | Mostly Sunny | Partly Cloudy | Chance of Showers | Chance of T-Storm | Mostly Sunny | Mostly Clear | Mostly Clear | Chance of Showers | Mostly Sunny | Chance of Showers |
| Hi: 81°FHi: 27°C | Lo: 60°FLo: 16°C | Hi: 89°FHi: 32°C | Lo: 70°FLo: 21°C | Hi: 91°FHi: 33°C | Lo: 65°FLo: 18°C | Hi: 81°FHi: 27°C | Hi: 81°FHi: 27°C Lo: 59°FLo: 15°C | Hi: 81°FHi: 27°C Lo: 59°FLo: 15°C | Lo: 61°FLo: 16°C | Hi: 89°FHi: 32°C | Lo: 65°FLo: 18°C |
| POP: 50% | POP: 70% | POP: 30% | POP: 30% |
POP = Probability of Precipitation.
Weather Outlook Updated: 437 AM CDT Mon Sep 07 2026 

Dewey Radar Loop
Use the map search tool if you want to place a location marker on the radar map...
Dewey Weather Map
Dewey Quick Facts
Dewey Forecast Discussion
Meteorlogic Glosserator
Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 555 AM CDT Mon Sep 7 2026
Key Messages
- Heat Returns Midweek: Hot and muggy conditions return Tuesday and Wednesday. Temperatures will top out in the 90s both days. There is a 50-80% chance of heat indices greater than 95 degrees south of I-70 Wednesday afternoon.
- Midweek Storm Potential: A passing front brings a 70-90% chance for showers and thunderstorms Wednesday into Thursday.
Discussion
... Issued at 202 AM CDT Mon Sep 7...
Weather World