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City of Marietta, OhioMarietta, OH Weather Forecast
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Marietta Weather Forecast
| TONIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY |
 |  |  | |  |  | |  | |  | | |
| Mostly Cloudy | Mostly Sunny | Partly Cloudy | Sunny | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Partly Cloudy | Partly Cloudy | Chance of Showers | Partly Cloudy | Partly Cloudy |
| Lo: 61°FLo: 16°C | Hi: 85°FHi: 29°C | Lo: 65°FLo: 18°C | Hi: 89°FHi: 32°C | Lo: 70°FLo: 21°C | Hi: 79°FHi: 26°C | Lo: 61°FLo: 16°C | Hi: 81°FHi: 27°C Lo: 61°FLo: 16°C | Hi: 81°FHi: 27°C Lo: 61°FLo: 16°C | Hi: 85°FHi: 29°C | Hi: 85°FHi: 29°C Lo: 65°FLo: 18°C | Hi: 85°FHi: 29°C Lo: 65°FLo: 18°C |
| POP: 70% | POP: 90% | POP: 90% | POP: 30% |
POP = Probability of Precipitation.
Weather Outlook Updated: 903 PM EDT Mon Sep 07 2026 
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Issued: 1250 AM EDT Tue Sep 8 2026
Key Messages
1) Dry and warm weather remains forecast into Wednesday afternoon, with some valley fog each morning through Wednesday.
2) Heavy showers and thunderstorms are forecast to arrive Wednesday night into early Friday morning, with localized flash flooding possible.
Discussion
... KEY MESSAGE 1...
In the mid/upper-levels, an Omega Block exists across the U.S., with the CWA beneath the inflection point of the easternmost closed low over the Canadian Maritimes and the subtropical ridge centered ...