Weather WorldMark Twain State Park, MO Weather Forecast
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Mark Twain State Park Weather Forecast
| TONIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY |
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| Chance of Showers | Sunny | Clearing | Chance of Showers | Partly Cloudy | Mostly Sunny | Chance of Showers | Mostly Sunny | Chance of T-Storm | Mostly Clear | Mostly Clear | Mostly Sunny |
| Lo: 60°FLo: 16°C | Hi: 81°FHi: 27°C | Lo: 60°FLo: 16°C | Hi: 81°FHi: 27°C | Lo: 61°FLo: 16°C | Hi: 85°FHi: 29°C | Lo: 69°FLo: 21°C | Hi: 89°FHi: 32°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: 85°FHi: 29°C |
| POP: 20% | POP: 20% | POP: 20% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 558 PM CDT Sat Aug 22 2026 
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Issued: 610 PM CDT Sat Aug 22 2026
Key Messages
- Pleasant and mostly dry conditions are expected through the upcoming week.
Aviation
/00Z TAFS THROUGH 06Z MONDAY/... Issued at 606 PM CDT Sat Aug 22 2026
Northerly post-frontal winds will continue to usher cooler, drier air into the region though the TAF period, limiting aviation concerns. That said, there is a narrow band of isolated showers dropping SE through central IL that could bring a very weak shower to UIN over the next few hours or the STL metro terminals between 04Z and 06Z. ...