Iona, ID Weather & Growing Conditions
Tonight
35°F
Mostly Cloudy
Mostly cloudy. Low around 35, with temperatures rising to around 37 overnight. East wind around 8 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 35°F | Mostly Cloudy | 8 mph E | 0% |
| Wednesday | 48°F | Partly Sunny | 8 mph SSW | 1% |
| Wednesday Night | 32°F | Patchy Fog | 7 to 10 mph SSE | 0% |
| Thursday | 46°F | Mostly Sunny | 3 to 10 mph SSW | 11% |
| Thursday Night | 34°F | Partly Cloudy | 3 to 13 mph SSW | 11% |
| Friday | 46°F | Mostly Sunny | 2 to 12 mph SSW | 1% |
| Friday Night | 33°F | Partly Cloudy | 2 to 8 mph SSE | 1% |
| Saturday | 50°F | Sunny | 1 to 8 mph W | 0% |
| Saturday Night | 35°F | Partly Cloudy | 1 to 10 mph ESE | 0% |
| Sunday | 55°F | Mostly Sunny | 2 to 12 mph SSW | 0% |
| Sunday Night | 38°F | Partly Cloudy | 2 to 9 mph SSE | 0% |
| Monday | 55°F | Mostly Sunny | 1 to 9 mph SW | 1% |
| Monday Night | 40°F | Mostly Cloudy | 1 to 10 mph S | 2% |
| Tuesday | 54°F | Mostly Sunny | 2 to 10 mph SSW | 6% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Iona, ID
Last spring frost
May 9
First fall frost
Oct 1
Growing season
142 days
Hardiness zone
5b
Explore more for Iona, ID: full frost dates · planting calendar · Idaho frost dates
Climate data from the nearest NOAA station, Idaho Falls - Kifi, Id (7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.