Onamia, MN Weather & Growing Conditions
Today
72°F
Mostly Sunny
Mostly sunny, with a high near 72. West northwest wind around 10 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 72°F | Mostly Sunny | 10 mph WNW | 0% |
| Tonight | 52°F | Mostly Clear | 5 to 10 mph W | 0% |
| Wednesday | 77°F | Sunny | 5 to 10 mph SW | 0% |
| Wednesday Night | 58°F | Partly Cloudy | 5 to 10 mph SW | 3% |
| Thursday | 81°F | Sunny | 10 to 15 mph SW | 5% |
| Thursday Night | 62°F | Mostly Clear | 10 mph SSW | 6% |
| Friday | 83°F | Sunny | 5 to 10 mph SW | 9% |
| Friday Night | 60°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph WSW | 23% |
| Saturday | 81°F | Slight Chance Showers And Thunderstorms | 5 mph SSW | 18% |
| Saturday Night | 61°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 5 mph NNE | 42% |
| Sunday | 79°F | Chance Showers And Thunderstorms then Mostly Sunny | 5 mph NE | 26% |
| Sunday Night | 60°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 5 mph NE | 15% |
| Monday | 79°F | Slight Chance Showers And Thunderstorms | 5 mph NNE | 16% |
| Monday Night | 59°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 5 mph NNE | 19% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Onamia, MN
Last spring frost
May 10
First fall frost
Oct 3
Growing season
144 days
Hardiness zone
4a
Explore more for Onamia, MN: full frost dates · planting calendar · Minnesota frost dates
Climate data from the nearest NOAA station, Isle 12N, Mn (17.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.