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Roc Mar Ton Lake, IN Weather Forecast
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Roc Mar Ton Lake Weather Forecast
| REST OF TONIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY |
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| Chance of T-Storm | Chance of T-Storm | Clearing | Mostly Sunny | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Partly Cloudy | Partly Cloudy | Mostly Clear | Chance of T-Storm |
| Lo: 69°FLo: 21°C | Hi: 79°FHi: 26°C | Lo: 59°FLo: 15°C | Hi: 79°FHi: 26°C | Lo: 61°FLo: 16°C | Hi: 79°FHi: 26°C | Hi: 75°FHi: 24°C Lo: 61°FLo: 16°C | Hi: 75°FHi: 24°C Lo: 61°FLo: 16°C | Hi: 75°FHi: 24°C Lo: 55°FLo: 13°C | Hi: 75°FHi: 24°C Lo: 55°FLo: 13°C | Lo: 59°FLo: 15°C | Hi: 79°FHi: 26°C |
| POP: 50% | POP: 40% | POP: 40% | POP: 60% | POP: 20% | POP: 20% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1257 AM EDT Mon Aug 17 2026 
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Roc Mar Ton Lake Forecast Discussion
Issued: 241 AM EDT Mon Aug 17 2026
Key Messages
- One more round of showers and a few storms early today
- Areas of fog tonight with dense fog possible
- Additional thunderstorms likely mid week
- Turning milder and drier late week into next weekend
Discussion
(Today through Sunday)... Issued at 240 AM EDT Mon Aug 17 2026
The persistent upper level ridge to the south that has kept central Indiana squarely in the bullseye of ring-of-fire convection for the last week plus will finally begin to retrograde to the we...