Iona, MN Weather & Growing Conditions
Today
68°F
Patchy Smoke then Slight Chance Rain Showers
Patchy smoke before 9am, then a slight chance of rain showers between 3pm and 4pm. Partly sunny, with a high near 68. North northwest wind 5 to 10 mph. Chance of precipitation is 20%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 68°F | Patchy Smoke then Slight Chance Rain Showers | 5 to 10 mph NNW | 18% |
| Tonight | 52°F | Partly Cloudy | 0 to 5 mph WNW | 7% |
| Wednesday | 74°F | Sunny | 0 to 5 mph SW | 0% |
| Wednesday Night | 55°F | Mostly Clear | 5 to 10 mph SSW | 0% |
| Thursday | 79°F | Sunny | 10 to 15 mph SSW | 0% |
| Thursday Night | 61°F | Mostly Clear | 10 to 15 mph SSW | 3% |
| Friday | 83°F | Sunny | 10 to 15 mph SSW | 8% |
| Friday Night | 63°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph SSW | 15% |
| Saturday | 84°F | Sunny | 5 to 15 mph SSW | 9% |
| Saturday Night | 65°F | Chance Showers And Thunderstorms | 10 to 15 mph SE | 27% |
| Sunday | 82°F | Slight Chance Showers And Thunderstorms then Mostly Sunny | 10 mph ESE | 21% |
| Sunday Night | 64°F | Partly Cloudy then Chance Showers And Thunderstorms | 10 to 15 mph E | 30% |
| Monday | 81°F | Chance Showers And Thunderstorms then Partly Sunny | 10 to 15 mph E | 30% |
| Monday Night | 63°F | Slight Chance Showers And Thunderstorms | 10 to 15 mph ENE | 21% |
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 Aug 4, 2026.