Marietta, MN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Marietta, a city in Lac Qui Parle County, Minnesota.
Today
72°F
Mostly Sunny
Mostly sunny, with a high near 72. Northwest wind 5 to 10 mph.
7-day forecast for Marietta
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 72°F | Mostly Sunny | 5 to 10 mph NW | 1% |
| Tonight | 52°F | Mostly Clear | 5 mph WSW | 1% |
| Wednesday | 77°F | Sunny | 5 to 10 mph SW | 0% |
| Wednesday Night | 59°F | Mostly Clear | 5 to 15 mph SSW | 1% |
| Thursday | 82°F | Sunny | 10 to 15 mph SW | 1% |
| Thursday Night | 62°F | Mostly Clear | 5 to 15 mph SSW | 6% |
| Friday | 83°F | Sunny | 10 to 15 mph SW | 11% |
| Friday Night | 60°F | Mostly Clear | 5 mph S | 11% |
| Saturday | 83°F | Sunny | 5 to 10 mph SSE | 10% |
| Saturday Night | 61°F | Chance Showers And Thunderstorms | 5 to 10 mph ESE | 26% |
| Sunday | 81°F | Slight Chance Showers And Thunderstorms then Mostly Sunny | 5 to 10 mph NE | 24% |
| Sunday Night | 61°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 5 mph ENE | 21% |
| Monday | 79°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph NE | 21% |
| Monday Night | 60°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 5 to 10 mph NE | 15% |
Forecast source: National Weather Service (api.weather.gov) for Marietta (45.010, -96.419). Updated through the day.
Growing snapshot for Marietta
Last spring frost
May 3
First fall frost
Oct 2
Growing season
151 days
Hardiness zone
4b
More local growing data for Marietta: nearby ZIP 56257 weather · frost dates · planting calendar · Minnesota frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Madison Wwtp, Mn (11.8 mi from Marietta). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.