Ionia, MI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Ionia, a city in Ionia County, Michigan.
This Afternoon
87°F
Sunny
Sunny, with a high near 87. Southwest wind around 9 mph, with gusts as high as 20 mph.
7-day forecast for Ionia
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 87°F | Sunny | 9 mph SW | 0% |
| Tonight | 61°F | Partly Cloudy | 3 to 9 mph SW | 0% |
| Wednesday | 84°F | Partly Sunny then Chance Showers And Thunderstorms | 5 to 10 mph SW | 51% |
| Wednesday Night | 62°F | Slight Chance Showers And Thunderstorms then Showers And Thunderstorms | 2 to 9 mph W | 83% |
| Thursday | 81°F | Showers And Thunderstorms | 6 mph W | 83% |
| Thursday Night | 58°F | Chance Showers And Thunderstorms then Partly Cloudy | 1 to 5 mph SW | 45% |
| Friday | 85°F | Mostly Sunny | 1 to 6 mph SW | 10% |
| Friday Night | 60°F | Mostly Clear | 6 mph WSW | 10% |
| Saturday | 87°F | Sunny | 5 to 14 mph SW | 4% |
| Saturday Night | 65°F | Chance Rain Showers | 6 to 13 mph SW | 28% |
| Sunday | 88°F | Chance Rain Showers | 9 to 17 mph SW | 28% |
| Sunday Night | 65°F | Chance Rain Showers | 8 to 16 mph WSW | 49% |
| Monday | 86°F | Chance Rain Showers | 8 to 12 mph W | 49% |
| Monday Night | 63°F | Chance Rain Showers | 7 to 12 mph W | 51% |
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 Aug 4, 2026.