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
50°F
Light Rain
Rain and patchy fog. Cloudy. High near 50, with temperatures falling to around 46 in the afternoon. North northwest wind around 20 mph, with gusts as high as 35 mph. Chance of precipitation is 100%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Marietta
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 50°F | Light Rain | 20 mph NNW | 97% |
| Tonight | 38°F | Rain | 15 to 20 mph NNW | 100% |
| Wednesday | 44°F | Rain | 15 to 20 mph NNW | 94% |
| Wednesday Night | 34°F | Rain Likely then Mostly Cloudy | 15 mph NNW | 72% |
| Thursday | 43°F | Partly Sunny | 10 to 15 mph NNW | 8% |
| Thursday Night | 30°F | Mostly Cloudy | 5 to 10 mph N | 0% |
| Friday | 45°F | Partly Sunny | 0 to 5 mph SE | 0% |
| Friday Night | 29°F | Partly Cloudy | 5 mph SSW | 0% |
| Saturday | 56°F | Mostly Sunny | 5 to 10 mph WSW | 2% |
| Saturday Night | 35°F | Partly Cloudy | 5 to 10 mph W | 4% |
| Sunday | 58°F | Sunny | 5 to 10 mph WSW | 3% |
| Sunday Night | 38°F | Partly Cloudy | 5 to 10 mph SW | 0% |
| Monday | 60°F | Mostly Sunny | 10 to 15 mph W | 0% |
| Monday Night | 37°F | Mostly Clear | 5 to 10 mph WNW | 0% |
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 Nov 3, 2026.