Marietta, MN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Marietta, a city in Lac Qui Parle County, Minnesota.
This Afternoon
61°F
Rain Showers Likely
Rain showers likely. Cloudy, with a high near 61. East wind around 10 mph. Chance of precipitation is 60%.
7-day forecast for Marietta
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 61°F | Rain Showers Likely | 10 mph E | 64% |
| Tonight | 55°F | Rain Showers Likely | 5 to 10 mph ENE | 60% |
| Saturday | 65°F | Chance Rain Showers then Slight Chance Drizzle | 5 to 10 mph NNE | 28% |
| Saturday Night | 51°F | Mostly Cloudy | 5 to 10 mph NNE | 4% |
| Sunday | 67°F | Mostly Cloudy | 5 to 10 mph NE | 5% |
| Sunday Night | 49°F | Cloudy then Chance Rain Showers | 5 to 10 mph ENE | 32% |
| Monday | 63°F | Chance Rain Showers | 5 mph E | 32% |
| Monday Night | 44°F | Mostly Cloudy | 0 to 5 mph ESE | 5% |
| Tuesday | 66°F | Partly Sunny | 0 to 10 mph ESE | 1% |
| Tuesday Night | 46°F | Partly Cloudy | 5 mph SE | 2% |
| Wednesday | 68°F | Mostly Sunny | 5 to 10 mph SSE | 8% |
| Wednesday Night | 50°F | Mostly Cloudy then Chance Rain Showers | 5 mph SSE | 29% |
| Thursday | 71°F | Chance Rain Showers | 5 to 10 mph SSE | 29% |
| Thursday Night | 52°F | Partly Cloudy | 5 mph SSE | 8% |
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 Sep 19, 2026.