Ionia, IA Weather & Growing Conditions
Today
71°F
Showers And Thunderstorms Likely
Showers and thunderstorms likely before 5pm, then a chance of showers and thunderstorms. Cloudy. High near 71, with temperatures falling to around 69 in the afternoon. West wind around 9 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 71°F | Showers And Thunderstorms Likely | 9 mph W | 64% |
| Tonight | 57°F | Chance Showers And Thunderstorms | 9 to 15 mph N | 41% |
| Sunday | 64°F | Slight Chance Rain Showers then Cloudy | 15 to 18 mph NE | 17% |
| Sunday Night | 51°F | Mostly Cloudy then Chance Rain Showers | 15 mph NE | 27% |
| Monday | 61°F | Chance Rain Showers | 13 to 16 mph NE | 36% |
| Monday Night | 46°F | Chance Rain Showers | 12 mph NE | 33% |
| Tuesday | 60°F | Mostly Sunny | 10 mph NE | 14% |
| Tuesday Night | 43°F | Mostly Clear | 7 mph E | 2% |
| Wednesday | 64°F | Sunny | 7 mph E | 1% |
| Wednesday Night | 48°F | Partly Cloudy | 5 mph E | 4% |
| Thursday | 65°F | Slight Chance Rain Showers | 5 mph E | 15% |
| Thursday Night | 50°F | Partly Cloudy | 3 mph E | 4% |
| Friday | 68°F | Mostly Sunny | 3 to 7 mph E | 4% |
| Friday Night | 52°F | Partly Cloudy | 5 mph SE | 9% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Ionia, IA
Last spring frost
May 2
First fall frost
Oct 5
Growing season
155 days
Hardiness zone
5a
Explore more for Ionia, IA: full frost dates · planting calendar · Iowa frost dates
Climate data from the nearest NOAA station, New Hampton, Ia (6.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.