Idaho Falls, ID Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Idaho Falls, a city in Bonneville County, Idaho.
Overnight
32°F
Mostly Cloudy
Mostly cloudy. Low around 32, with temperatures rising to around 34 overnight. North wind around 3 mph.
7-day forecast for Idaho Falls
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 32°F | Mostly Cloudy | 3 mph N | 1% |
| Wednesday | 50°F | Patchy Fog then Partly Sunny | 2 to 7 mph WSW | 1% |
| Wednesday Night | 30°F | Areas Of Fog | 2 to 7 mph SSE | 1% |
| Thursday | 48°F | Areas Of Fog then Mostly Cloudy | 5 mph S | 3% |
| Thursday Night | 32°F | Areas Of Fog | 3 to 7 mph SSW | 3% |
| Friday | 46°F | Mostly Sunny | 2 to 6 mph SSW | 0% |
| Friday Night | 29°F | Partly Cloudy | 2 mph SE | 0% |
| Saturday | 50°F | Sunny | 3 mph NNE | 0% |
| Saturday Night | 31°F | Partly Cloudy | 3 mph NE | 0% |
| Sunday | 56°F | Mostly Sunny | 3 mph SSW | 0% |
| Sunday Night | 34°F | Partly Cloudy | 3 mph SSE | 0% |
| Monday | 55°F | Mostly Sunny | 3 mph N | 0% |
| Monday Night | 35°F | Mostly Cloudy | 2 mph ESE | 0% |
| Tuesday | 56°F | Mostly Sunny | 3 mph S | 2% |
Forecast source: National Weather Service (api.weather.gov) for Idaho Falls (43.489, -112.036). Updated through the day.
Growing snapshot for Idaho Falls
Last spring frost
May 9
First fall frost
Oct 1
Growing season
142 days
Hardiness zone
5b
More local growing data for Idaho Falls: nearby ZIP 83404 weather · frost dates · planting calendar · Idaho frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Idaho Falls - Kifi, Id (6 mi from Idaho Falls). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.