Onamia, MN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Onamia, a city in Mille Lacs County, Minnesota.
This Afternoon
52°F
Light Rain
Rain. Cloudy, with a high near 52. North wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 80%.
7-day forecast for Onamia
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 52°F | Light Rain | 15 mph N | 75% |
| Tonight | 36°F | Light Rain | 15 mph N | 79% |
| Thursday | 42°F | Mostly Cloudy | 10 to 15 mph N | 3% |
| Thursday Night | 26°F | Mostly Cloudy then Patchy Fog | 0 to 10 mph NNE | 1% |
| Friday | 42°F | Areas Of Fog then Sunny | 0 mph | 0% |
| Friday Night | 25°F | Areas Of Fog | 0 mph | 0% |
| Saturday | 47°F | Patchy Fog then Mostly Sunny | 0 to 10 mph SW | 1% |
| Saturday Night | 33°F | Partly Cloudy | 5 mph W | 2% |
| Sunday | 52°F | Sunny | 5 mph W | 0% |
| Sunday Night | 34°F | Partly Cloudy | 0 to 5 mph SSW | 0% |
| Monday | 57°F | Mostly Sunny | 5 to 10 mph WSW | 0% |
| Monday Night | 35°F | Mostly Clear | 5 mph WNW | 0% |
| Tuesday | 51°F | Mostly Sunny | 5 mph WNW | 1% |
| Tuesday Night | 33°F | Partly Cloudy | 0 mph | 0% |
Forecast source: National Weather Service (api.weather.gov) for Onamia (46.070, -93.667). Updated through the day.
Growing snapshot for Onamia
Last spring frost
May 10
First fall frost
Oct 3
Growing season
144 days
Hardiness zone
4a
More local growing data for Onamia: nearby ZIP 56359 weather · frost dates · planting calendar · Minnesota frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Isle 12N, Mn (17.1 mi from Onamia). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 5, 2026.