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Jefferson Lake State Park, OH Weather Forecast
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Jefferson Lake State Park Weather Forecast
| TODAY | TONIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT |
 |  | |  |  | | | | | | | |
| Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Clear | Mostly Sunny | Clear | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Mostly Sunny | Clear |
| Hi: 79°FHi: 26°C | Lo: 61°FLo: 16°C | Hi: 79°FHi: 26°C | Lo: 59°FLo: 15°C | Hi: 79°FHi: 26°C | Lo: 60°FLo: 16°C | Hi: 79°FHi: 26°C | Lo: 60°FLo: 16°C | Hi: 75°FHi: 24°C | Lo: 55°FLo: 13°C | Hi: 75°FHi: 24°C | Lo: 55°FLo: 13°C |
| POP: 40% | POP: 50% | POP: 50% | POP: 50% | POP: 50% | POP: 30% | POP: 30% |
POP = Probability of Precipitation.
Weather Outlook Updated: 658 AM EDT Wed Aug 19 2026 
Jefferson Lake State Park Radar Loop
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Jefferson Lake State Park Forecast Discussion
Issued: 745 AM EDT Wed Aug 19 2026
Key Messages
1) Slightly higher risk for Flash Flooding overnight tonight into Thursday morning with potential training of heavier rain storms.
2) Additional rounds of rain favored over the weekend with limited hazardous weather risks.
Discussion
... KEY MESSAGE 1... A weak frontal boundary dropping out of southern MI will combine with limited mid-level shortwave movement to create low probability shower and thunderstorm chances mainly near the I-80 corridor this aftern...