Marietta, IN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Marietta, a community in Shelby County, Indiana.
Today
83°F
Sunny
Sunny, with a high near 83. East wind around 1 mph.
7-day forecast for Marietta
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 83°F | Sunny | 1 mph E | 0% |
| Tonight | 62°F | Mostly Clear | 2 mph NE | 0% |
| Wednesday | 85°F | Sunny | 1 mph NNW | 0% |
| Wednesday Night | 66°F | Mostly Clear | 2 mph S | 3% |
| Thursday | 85°F | Mostly Sunny then Scattered Showers And Thunderstorms | 2 to 6 mph SSW | 34% |
| Thursday Night | 68°F | Scattered Showers And Thunderstorms then Chance Showers And Thunderstorms | 5 mph SSW | 64% |
| Friday | 84°F | Chance Showers And Thunderstorms then Isolated Showers And Thunderstorms | 5 mph SW | 62% |
| Friday Night | 67°F | Chance Showers And Thunderstorms | 3 mph SW | 58% |
| Saturday | 85°F | Slight Chance Showers And Thunderstorms | 1 to 5 mph SW | 24% |
| Saturday Night | 68°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 5 mph SSW | 24% |
| Sunday | 87°F | Mostly Sunny | 2 to 7 mph SSW | 13% |
| Sunday Night | 71°F | Partly Cloudy | 6 mph SSW | 13% |
| Monday | 88°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 to 8 mph SW | 18% |
| Monday Night | 71°F | Chance Showers And Thunderstorms | 6 mph SW | 30% |
Forecast source: National Weather Service (api.weather.gov) for Marietta (39.441, -85.881). Updated through the day.
Growing snapshot for Marietta
Last spring frost
Apr 20
First fall frost
Oct 19
Growing season
180 days
Hardiness zone
6b
More local growing data for Marietta: nearby ZIP 46124 weather · frost dates · planting calendar · Indiana frost dates
Nearby towns & communities
Boggstown
Carrollton
Edinburgh
Fairland
Flat Rock
Fountaintown
Geneva
Gwynneville
London
Marion
Morristown
Pleasant View Village
Shelbyville
Waldron
Climate data from the nearest NOAA station, Franklin Wwtp, In (8.4 mi from Marietta). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.