Iona, ID Weather & Growing Conditions
Overnight
48°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms before 2am, then a slight chance of showers and thunderstorms between 2am and 3am, then a slight chance of rain. Mostly cloudy. Low around 48, with temperatures rising to around 50 overnight. South wind around 8 mph. Chance of precipitation is 40%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 48°F | Chance Showers And Thunderstorms | 8 mph S | 43% |
| Saturday | 60°F | Chance Light Rain then Slight Chance Showers And Thunderstorms | 6 to 9 mph SW | 42% |
| Saturday Night | 44°F | Partly Cloudy | 6 mph S | 7% |
| Sunday | 65°F | Mostly Sunny | 6 mph SW | 3% |
| Sunday Night | 44°F | Mostly Clear | 2 to 9 mph E | 0% |
| Monday | 71°F | Sunny | 3 to 10 mph WNW | 0% |
| Monday Night | 48°F | Mostly Clear | 5 to 9 mph E | 0% |
| Tuesday | 73°F | Mostly Sunny | 5 to 10 mph NE | 0% |
| Tuesday Night | 50°F | Partly Cloudy | 5 to 10 mph SE | 13% |
| Wednesday | 73°F | Mostly Sunny | 7 to 10 mph SW | 8% |
| Wednesday Night | 50°F | Mostly Clear | 3 to 12 mph SSE | 2% |
| Thursday | 76°F | Sunny | 6 to 13 mph SSW | 2% |
| Thursday Night | 52°F | Partly Cloudy | 5 to 15 mph SSE | 1% |
| Friday | 76°F | Mostly Sunny | 9 to 15 mph S | 1% |
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 Sep 19, 2026.