Marietta, MN Weather & Growing Conditions
Tonight
55°F
Chance Rain Showers then Chance Drizzle
A chance of rain showers and patchy fog before 7pm, then a chance of drizzle and patchy fog between 7pm and 4am. Cloudy, with a low around 55. East northeast wind 5 to 10 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 55°F | Chance Rain Showers then Chance Drizzle | 5 to 10 mph ENE | 54% |
| Saturday | 65°F | Cloudy | 5 to 10 mph NNE | 9% |
| Saturday Night | 52°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 to 10 mph E | 32% |
| Monday Night | 45°F | Mostly Cloudy | 0 to 5 mph E | 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 | 28% |
| Thursday | 72°F | Chance Rain Showers | 5 to 10 mph SSE | 28% |
| Thursday Night | 53°F | Partly Cloudy | 5 mph SSE | 8% |
| Friday | 73°F | Partly Sunny | 5 to 10 mph SSE | 8% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Marietta, MN
Last spring frost
May 3
First fall frost
Oct 2
Growing season
151 days
Hardiness zone
4b
Explore more for Marietta, MN: full frost dates · planting calendar · Minnesota frost dates
Climate data from the nearest NOAA station, Madison Wwtp, Mn (11.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.