Ionia, IA Weather & Growing Conditions
Tonight
57°F
Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms. Cloudy, with a low around 57. North wind 7 to 14 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 57°F | Slight Chance Showers And Thunderstorms | 7 to 14 mph N | 22% |
| Sunday | 66°F | Slight Chance Rain Showers then Cloudy | 13 to 16 mph NE | 17% |
| Sunday Night | 50°F | Cloudy then Chance Rain Showers | 13 to 16 mph NE | 33% |
| Monday | 58°F | Rain Showers Likely | 13 to 16 mph NE | 64% |
| Monday Night | 46°F | Rain Showers Likely | 12 mph NE | 64% |
| Tuesday | 59°F | Slight Chance Rain Showers then Partly Sunny | 12 mph NE | 22% |
| Tuesday Night | 44°F | Partly Cloudy | 7 mph NE | 2% |
| Wednesday | 63°F | Mostly Sunny | 7 mph E | 0% |
| Wednesday Night | 48°F | Partly Cloudy | 5 mph E | 5% |
| Thursday | 65°F | Slight Chance Rain Showers | 5 mph SE | 15% |
| Thursday Night | 53°F | Slight Chance Rain Showers | 3 mph SE | 18% |
| Friday | 69°F | Partly Sunny | 6 mph E | 11% |
| Friday Night | 54°F | Mostly Cloudy | 5 mph E | 7% |
| Saturday | 68°F | Slight Chance Rain Showers | 5 to 9 mph SE | 21% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Ionia, IA
Last spring frost
May 2
First fall frost
Oct 5
Growing season
155 days
Hardiness zone
5a
Explore more for Ionia, IA: full frost dates · planting calendar · Iowa frost dates
Climate data from the nearest NOAA station, New Hampton, Ia (6.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.