Iona, MN Weather & Growing Conditions
Overnight
38°F
Chance Rain Showers
A chance of rain showers. Cloudy. Low around 38, with temperatures rising to around 41 overnight. Northwest wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 38°F | Chance Rain Showers | 15 mph NW | 48% |
| Wednesday | 43°F | Rain Showers | 15 to 20 mph NW | 78% |
| Wednesday Night | 35°F | Rain Showers Likely | 15 mph NW | 68% |
| Thursday | 42°F | Mostly Cloudy | 15 mph NNW | 2% |
| Thursday Night | 29°F | Mostly Cloudy | 0 to 10 mph N | 0% |
| Friday | 42°F | Mostly Sunny | 0 mph | 0% |
| Friday Night | 27°F | Partly Cloudy | 0 to 5 mph S | 0% |
| Saturday | 48°F | Mostly Sunny | 5 to 10 mph SW | 2% |
| Saturday Night | 33°F | Mostly Clear | 5 mph W | 0% |
| Sunday | 53°F | Sunny | 5 to 10 mph WSW | 0% |
| Sunday Night | 36°F | Mostly Clear | 5 to 10 mph SW | 0% |
| Monday | 58°F | Sunny | 10 mph W | 0% |
| Monday Night | 36°F | Mostly Clear | 5 mph NW | 0% |
| Tuesday | 55°F | Mostly Sunny | 5 mph W | 1% |
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 Nov 4, 2026.