Ionia, MI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Ionia, a city in Ionia County, Michigan.
This Afternoon
75°F
Partly Sunny
Partly sunny. High near 75, with temperatures falling to around 73 in the afternoon. South southwest wind around 13 mph, with gusts as high as 25 mph.
7-day forecast for Ionia
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 75°F | Partly Sunny | 13 mph SSW | 5% |
| Tonight | 61°F | Partly Cloudy | 9 to 13 mph SSE | 12% |
| Wednesday | 71°F | Rain Showers | 12 to 16 mph S | 88% |
| Wednesday Night | 49°F | Chance Rain Showers | 12 mph SW | 48% |
| Thursday | 58°F | Chance Rain Showers | 10 to 15 mph SW | 49% |
| Thursday Night | 43°F | Chance Rain Showers | 3 to 9 mph W | 53% |
| Friday | 53°F | Rain Showers Likely | 6 to 10 mph NNW | 55% |
| Friday Night | 34°F | Chance Rain Showers then Mostly Cloudy | 6 to 9 mph N | 39% |
| Saturday | 52°F | Mostly Sunny | 5 to 8 mph NW | 8% |
| Saturday Night | 32°F | Partly Cloudy | 6 mph WSW | 4% |
| Sunday | 56°F | Mostly Sunny then Slight Chance Rain Showers | 5 to 12 mph W | 22% |
| Sunday Night | 34°F | Slight Chance Rain Showers then Partly Cloudy | 6 to 9 mph WNW | 22% |
| Monday | 59°F | Mostly Sunny | 6 to 13 mph W | 8% |
| Monday Night | 38°F | Partly Cloudy | 10 mph WSW | 6% |
Forecast source: National Weather Service (api.weather.gov) for Ionia (42.977, -85.075). Updated through the day.
Growing snapshot for Ionia
Last spring frost
May 3
First fall frost
Oct 12
Growing season
161 days
Hardiness zone
6a
More local growing data for Ionia: nearby ZIP 48846 weather · frost dates · planting calendar · Michigan frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Ionia 2Ssw, Mi (2.5 mi from Ionia). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.