Iona, MN Weather & Growing Conditions
Tonight
58°F
Areas Of Fog
Areas of fog before 1am, then areas of fog and a chance of showers and thunderstorms between 1am and 3am, then areas of fog and a slight chance of showers and thunderstorms. Cloudy. Low around 58, with temperatures rising to around 62 overnight. North northeast wind 5 to 10 mph. Chance of precipitation is 30%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 58°F | Areas Of Fog | 5 to 10 mph NNE | 27% |
| Saturday | 64°F | Areas Of Fog | 10 to 15 mph NNE | 14% |
| Saturday Night | 53°F | Mostly Cloudy | 10 to 15 mph NNE | 6% |
| Sunday | 63°F | Slight Chance Rain Showers | 15 mph NE | 18% |
| Sunday Night | 50°F | Chance Rain Showers | 10 to 15 mph ENE | 43% |
| Monday | 59°F | Chance Rain Showers | 10 mph ENE | 46% |
| Monday Night | 45°F | Chance Rain Showers then Mostly Cloudy | 5 to 10 mph ENE | 39% |
| Tuesday | 62°F | Partly Sunny | 5 to 10 mph ESE | 7% |
| Tuesday Night | 45°F | Partly Cloudy | 5 mph SE | 0% |
| Wednesday | 65°F | Mostly Sunny | 5 to 10 mph SSE | 6% |
| Wednesday Night | 50°F | Mostly Cloudy then Slight Chance Rain Showers | 5 mph SSE | 24% |
| Thursday | 68°F | Slight Chance Rain Showers | 5 to 10 mph S | 24% |
| Thursday Night | 52°F | Partly Cloudy | 5 mph SSE | 11% |
| Friday | 69°F | Partly Sunny | 5 to 10 mph SE | 11% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Iona, MN
Last spring frost
May 7
First fall frost
Sep 29
Growing season
145 days
Hardiness zone
5a
Explore more for Iona, MN: full frost dates · planting calendar · Minnesota frost dates
Climate data from the nearest NOAA station, Lake Wilson, Mn (10.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.