Marietta, OH Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Marietta, a city in Washington County, Ohio.
Today
72°F
Mostly Cloudy then Light Rain
Rain after noon. Mostly cloudy, with a high near 72. South wind 8 to 12 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Marietta
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 72°F | Mostly Cloudy then Light Rain | 8 to 12 mph S | 92% |
| Tonight | 58°F | Light Rain | 5 to 12 mph S | 99% |
| Thursday | 71°F | Mostly Sunny | 3 to 9 mph SW | 2% |
| Thursday Night | 46°F | Partly Cloudy | 0 to 3 mph SW | 2% |
| Friday | 66°F | Partly Sunny then Slight Chance Light Rain | 0 to 7 mph W | 15% |
| Friday Night | 41°F | Slight Chance Light Rain then Mostly Cloudy | 6 mph W | 15% |
| Saturday | 56°F | Partly Sunny | 5 to 8 mph W | 14% |
| Saturday Night | 35°F | Mostly Cloudy | 1 to 5 mph W | 10% |
| Sunday | 59°F | Mostly Sunny | 1 to 9 mph W | 2% |
| Sunday Night | 33°F | Mostly Clear | 2 to 6 mph W | 4% |
| Monday | 60°F | Sunny | 2 to 8 mph SW | 6% |
| Monday Night | 35°F | Mostly Clear | 5 mph SW | 3% |
| Tuesday | 64°F | Sunny | 5 to 9 mph SW | 1% |
| Tuesday Night | 35°F | Mostly Clear | 0 to 5 mph W | 1% |
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 Nov 4, 2026.