Iona, ID Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Iona, a city in Bonneville County, Idaho.
Today
82°F
Patchy Smoke
Patchy smoke. Sunny, with a high near 82. South southwest wind 3 to 9 mph.
7-day forecast for Iona
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 82°F | Patchy Smoke | 3 to 9 mph SSW | 0% |
| Tonight | 53°F | Areas Of Smoke | 5 to 9 mph S | 0% |
| Wednesday | 85°F | Areas Of Smoke | 5 to 8 mph SSW | 0% |
| Wednesday Night | 56°F | Mostly Clear | 6 to 9 mph S | 0% |
| Thursday | 92°F | Sunny | 5 to 8 mph SSW | 0% |
| Thursday Night | 60°F | Clear | 6 to 9 mph S | 0% |
| Friday | 95°F | Sunny | 3 to 8 mph S | 0% |
| Friday Night | 63°F | Mostly Clear | 9 to 14 mph SSW | 0% |
| Saturday | 95°F | Sunny | 5 to 13 mph S | 0% |
| Saturday Night | 64°F | Mostly Clear | 7 to 15 mph SSW | 0% |
| Sunday | 94°F | Sunny | 6 to 17 mph SSW | 0% |
| Sunday Night | 64°F | Mostly Clear | 9 to 20 mph SSW | 1% |
| Monday | 93°F | Sunny | 7 to 16 mph SW | 1% |
| Monday Night | 62°F | Mostly Clear | 9 to 17 mph SSW | 1% |
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 Aug 4, 2026.