Marietta, IN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Marietta, a community in Shelby County, Indiana.
This Afternoon
69°F
Slight Chance Light Rain
A slight chance of rain before 4pm. Mostly cloudy. High near 69, with temperatures falling to around 66 in the afternoon. Southwest wind around 14 mph, with gusts as high as 23 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Marietta
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 69°F | Slight Chance Light Rain | 14 mph SW | 16% |
| Tonight | 47°F | Mostly Cloudy | 3 to 10 mph SW | 4% |
| Thursday | 63°F | Mostly Sunny | 6 to 13 mph SW | 0% |
| Thursday Night | 44°F | Mostly Cloudy | 2 to 7 mph W | 8% |
| Friday | 55°F | Mostly Cloudy | 3 to 12 mph NW | 11% |
| Friday Night | 35°F | Partly Cloudy | 5 to 9 mph NW | 11% |
| Saturday | 54°F | Mostly Sunny | 3 to 8 mph NW | 0% |
| Saturday Night | 30°F | Mostly Clear | 1 to 5 mph NW | 0% |
| Sunday | 57°F | Sunny | 1 to 8 mph W | 0% |
| Sunday Night | 33°F | Mostly Clear | 1 to 5 mph W | 0% |
| Monday | 61°F | Sunny | 0 to 6 mph W | 0% |
| Monday Night | 36°F | Clear | 5 mph SW | 0% |
| Tuesday | 63°F | Sunny | 2 to 6 mph WSW | 1% |
| Tuesday Night | 36°F | Mostly Clear | 3 mph NW | 3% |
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
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Gwynneville
London
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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 Nov 4, 2026.