Onamia, MN Weather & Growing Conditions
Today
51°F
Light Rain
Rain and patchy fog. Mostly cloudy, with a high near 51. North wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 51°F | Light Rain | 15 mph N | 96% |
| Tonight | 39°F | Light Rain then Slight Chance Drizzle | 15 to 20 mph N | 84% |
| Thursday | 43°F | Mostly Cloudy | 10 to 20 mph N | 11% |
| Thursday Night | 28°F | Partly Cloudy | 5 to 10 mph NNE | 0% |
| Friday | 41°F | Sunny | 0 to 5 mph ESE | 0% |
| Friday Night | 26°F | Mostly Clear | 0 to 5 mph SSW | 0% |
| Saturday | 46°F | Mostly Sunny | 5 to 10 mph SW | 4% |
| Saturday Night | 34°F | Partly Cloudy | 5 to 10 mph W | 6% |
| Sunday | 50°F | Sunny | 5 to 10 mph W | 3% |
| Sunday Night | 35°F | Partly Cloudy | 5 mph SW | 0% |
| Monday | 54°F | Mostly Sunny | 5 to 10 mph WSW | 1% |
| Monday Night | 36°F | Partly Cloudy | 5 mph WNW | 1% |
| Tuesday | 50°F | Mostly Sunny | 5 mph WNW | 1% |
| Tuesday Night | 35°F | Partly Cloudy | 0 to 5 mph WSW | 3% |
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 Nov 4, 2026.