Iona, ID Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Iona, a city in Bonneville County, Idaho.
This Afternoon
50°F
Partly Sunny
Partly sunny. High near 50, with temperatures falling to around 47 in the afternoon. North wind around 6 mph.
7-day forecast for Iona
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 50°F | Partly Sunny | 6 mph N | 0% |
| Tonight | 34°F | Mostly Cloudy | 6 mph ENE | 0% |
| Wednesday | 50°F | Partly Sunny | 3 to 7 mph S | 1% |
| Wednesday Night | 31°F | Patchy Fog | 3 to 7 mph SSE | 0% |
| Thursday | 48°F | Patchy Fog then Mostly Sunny | 6 mph SSW | 10% |
| Thursday Night | 33°F | Patchy Fog | 3 to 8 mph SSW | 10% |
| Friday | 48°F | Mostly Sunny | 2 to 7 mph SSW | 1% |
| Friday Night | 32°F | Partly Cloudy | 5 mph SSE | 1% |
| Saturday | 51°F | Sunny | 1 to 5 mph NW | 0% |
| Saturday Night | 33°F | Partly Cloudy | 1 to 6 mph E | 0% |
| Sunday | 57°F | Mostly Sunny | 2 to 7 mph S | 0% |
| Sunday Night | 37°F | Partly Cloudy | 2 to 6 mph SSE | 0% |
| Monday | 56°F | Mostly Sunny | 1 to 5 mph SSW | 0% |
| Monday Night | 38°F | Mostly Cloudy | 1 to 6 mph S | 2% |
Forecast source: National Weather Service (api.weather.gov) for Iona (43.528, -111.931). Updated through the day.
Growing snapshot for Iona
Last spring frost
May 9
First fall frost
Oct 1
Growing season
142 days
Hardiness zone
5b
More local growing data for Iona: nearby ZIP 83401 weather · frost dates · planting calendar · Idaho frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Idaho Falls - Kifi, Id (7 mi from Iona). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.