Weather World
Karls Lake, MO Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Karls Lake Weather Forecast
| TONIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY |
 |  | |  |  | | | | | | | |
| Clear | Sunny | Mostly Clear | Chance of T-Storm | Chance of Showers | Mostly Sunny | Mostly Clear | Mostly Sunny | Mostly Clear | Mostly Clear | Mostly Clear | Mostly Clear |
| Lo: 65°FLo: 18°C | Hi: 91°FHi: 33°C | Lo: 71°FLo: 22°C | Hi: 89°FHi: 32°C | Lo: 69°FLo: 21°C | Hi: 89°FHi: 32°C | Lo: 60°FLo: 16°C | Hi: 70°FHi: 21°C | Hi: 65°FHi: 18°C Lo: 45°FLo: 7°C | Hi: 65°FHi: 18°C Lo: 45°FLo: 7°C | Hi: 71°FHi: 22°C Lo: 39°FLo: 4°C | Hi: 71°FHi: 22°C Lo: 39°FLo: 4°C |
| POP: 90% | POP: 50% |
POP = Probability of Precipitation.
Weather Outlook Updated: 807 PM CDT Mon Oct 12 2026 
Karls Lake Radar Loop
Use the map search tool if you want to place a location marker on the radar map...
Karls Lake Weather Map
Karls Lake Quick Facts
Karls Lake Forecast Discussion
Meteorlogic Glosserator
Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 634 PM CDT Mon Oct 12 2026
Key Messages
- Record-breaking high temperatures and elevated humidity will bring heat index values in the 90s to low 100s on Tuesday.
- Widespread showers and thunderstorms with coverage of 70 to 100% are forecast Wednesday into Thursday morning.
- Lingering shower and thunderstorms chances with 50 to 70% coverage are forecast Thursday across northern parts of southeast Missouri, southern Illinois, and Evansville Tri- State region.
- A strong cold front will pass Thursday night, bringing a return of dry...