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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

WhenTempForecastWindPrecip
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

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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.