Marietta, OH Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Marietta, a city in Washington County, Ohio.
Today
87°F
Sunny
Sunny, with a high near 87. Northeast wind around 2 mph.
7-day forecast for Marietta
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 87°F | Sunny | 2 mph NE | 1% |
| Tonight | 68°F | Partly Cloudy | 2 mph E | 2% |
| Wednesday | 88°F | Mostly Sunny then Chance Showers And Thunderstorms | 3 mph SE | 31% |
| Wednesday Night | 69°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 2 mph S | 59% |
| Thursday | 86°F | Showers And Thunderstorms Likely | 1 to 6 mph SW | 65% |
| Thursday Night | 69°F | Showers And Thunderstorms Likely | 1 to 5 mph S | 65% |
| Friday | 85°F | Showers And Thunderstorms | 2 to 7 mph SW | 77% |
| Friday Night | 67°F | Showers And Thunderstorms | 1 to 5 mph SW | 77% |
| Saturday | 85°F | Chance Showers And Thunderstorms | 2 to 6 mph SW | 50% |
| Saturday Night | 67°F | Chance Showers And Thunderstorms | 0 to 5 mph SW | 50% |
| Sunday | 87°F | Slight Chance Showers And Thunderstorms | 1 to 7 mph SW | 22% |
| Sunday Night | 70°F | Slight Chance Showers And Thunderstorms | 1 to 5 mph SW | 22% |
| Monday | 88°F | Chance Showers And Thunderstorms | 3 to 9 mph SW | 26% |
| Monday Night | 69°F | Chance Showers And Thunderstorms | 2 to 6 mph SW | 38% |
Forecast source: National Weather Service (api.weather.gov) for Marietta (39.423, -81.446). Updated through the day.
Growing snapshot for Marietta
Last spring frost
Apr 18
First fall frost
Oct 27
Growing season
191 days
Hardiness zone
6b
More local growing data for Marietta: nearby ZIP 45750 weather · frost dates · planting calendar · Ohio frost dates
Nearby towns & communities
Belpre
Beverly
Devola
Little Hocking
Lowell
Lower Salem
Matamoras (New Matamoras)
Newport
Vincent
Waterford
Climate data from the nearest NOAA station, Marietta Wwtp, Oh (1.5 mi from Marietta). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.