Ionia, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Ionia, a town in Pettis County, Missouri.
Overnight
73°F
Mostly Clear
Mostly clear. Low around 73, with temperatures rising to around 75 overnight. South wind 3 to 7 mph.
7-day forecast for Ionia
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 73°F | Mostly Clear | 3 to 7 mph S | 2% |
| Saturday | 96°F | Mostly Sunny | 7 to 13 mph SW | 1% |
| Saturday Night | 70°F | Partly Cloudy then Chance Showers And Thunderstorms | 2 to 8 mph SW | 32% |
| Sunday | 85°F | Chance Showers And Thunderstorms | 5 mph NW | 37% |
| Sunday Night | 64°F | Showers And Thunderstorms | 6 mph NE | 84% |
| Monday | 75°F | Showers And Thunderstorms | 5 to 9 mph N | 84% |
| Monday Night | 57°F | Slight Chance Showers And Thunderstorms then Mostly Cloudy | 6 to 9 mph N | 17% |
| Tuesday | 69°F | Partly Sunny | 9 mph N | 8% |
| Tuesday Night | 51°F | Mostly Cloudy | 3 to 8 mph NE | 3% |
| Wednesday | 72°F | Mostly Sunny | 6 mph NE | 1% |
| Wednesday Night | 53°F | Partly Cloudy | 5 mph NE | 2% |
| Thursday | 75°F | Mostly Sunny | 5 mph NE | 5% |
| Thursday Night | 57°F | Mostly Cloudy | 3 mph NE | 6% |
| Friday | 75°F | Mostly Sunny | 6 mph E | 8% |
Forecast source: National Weather Service (api.weather.gov) for Ionia (38.504, -93.324). Updated through the day.
Growing snapshot for Ionia
Last spring frost
Apr 13
First fall frost
Oct 23
Growing season
191 days
Hardiness zone
6b
More local growing data for Ionia: nearby ZIP 65335 weather · frost dates · planting calendar · Missouri frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Cole Camp 3Nw, Mo (4.2 mi from Ionia). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.