Ionia, IA Weather & Growing Conditions
Today
51°F
Slight Chance Rain Showers then Mostly Cloudy
A slight chance of rain showers before 7am. Mostly cloudy. High near 51, with temperatures falling to around 49 in the afternoon. West wind around 16 mph, with gusts as high as 26 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 |
|---|---|---|---|---|
| Today | 51°F | Slight Chance Rain Showers then Mostly Cloudy | 16 mph W | 16% |
| Tonight | 43°F | Rain Showers Likely | 16 mph W | 61% |
| Thursday | 50°F | Chance Rain Showers | 16 mph NW | 28% |
| Thursday Night | 36°F | Mostly Cloudy | 8 to 13 mph N | 7% |
| Friday | 46°F | Mostly Sunny | 5 to 9 mph N | 2% |
| Friday Night | 28°F | Mostly Clear | 3 mph N | 0% |
| Saturday | 49°F | Sunny | 1 to 6 mph W | 0% |
| Saturday Night | 34°F | Mostly Clear | 6 mph W | 1% |
| Sunday | 55°F | Sunny | 5 to 8 mph W | 3% |
| Sunday Night | 35°F | Mostly Clear | 5 mph SW | 0% |
| Monday | 59°F | Sunny | 5 to 12 mph SW | 0% |
| Monday Night | 39°F | Mostly Clear | 7 mph W | 0% |
| Tuesday | 58°F | Sunny | 5 mph NW | 0% |
| Tuesday Night | 40°F | Partly Cloudy | 3 mph N | 1% |
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 Nov 4, 2026.