Ionia, MI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Ionia, a city in Ionia County, Michigan.
Overnight
51°F
Rain Showers Likely
Rain showers likely. Mostly cloudy. Low around 51, with temperatures rising to around 54 overnight. East wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Ionia
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 51°F | Rain Showers Likely | 10 mph E | 63% |
| Saturday | 65°F | Showers And Thunderstorms | 7 to 10 mph E | 92% |
| Saturday Night | 55°F | Showers And Thunderstorms | 6 to 9 mph ENE | 82% |
| Sunday | 67°F | Rain Showers Likely | 9 to 14 mph NE | 56% |
| Sunday Night | 49°F | Chance Rain Showers then Mostly Cloudy | 13 mph NE | 32% |
| Monday | 63°F | Mostly Cloudy | 15 mph ENE | 11% |
| Monday Night | 45°F | Mostly Cloudy | 13 to 16 mph ENE | 11% |
| Tuesday | 62°F | Partly Sunny | 16 mph NE | 14% |
| Tuesday Night | 47°F | Chance Rain Showers | 12 to 16 mph NE | 29% |
| Wednesday | 63°F | Chance Rain Showers | 13 mph NE | 29% |
| Wednesday Night | 48°F | Slight Chance Rain Showers then Mostly Cloudy | 6 to 13 mph NE | 19% |
| Thursday | 66°F | Partly Sunny | 7 to 10 mph NE | 5% |
| Thursday Night | 48°F | Mostly Cloudy | 3 to 8 mph NNE | 4% |
| Friday | 70°F | Mostly Sunny | 5 to 8 mph NNE | 7% |
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 Sep 19, 2026.