Idaho Falls, ID Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Idaho Falls, a city in Bonneville County, Idaho.
This Afternoon
63°F
Isolated Showers And Thunderstorms
Isolated showers and thunderstorms before 4pm. Mostly sunny, with a high near 63. Southwest wind around 8 mph. Chance of precipitation is 20%.
7-day forecast for Idaho Falls
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 63°F | Isolated Showers And Thunderstorms | 8 mph SW | 18% |
| Tonight | 42°F | Isolated Rain Showers | 1 to 7 mph SSE | 24% |
| Sunday | 68°F | Mostly Sunny | 1 to 5 mph WNW | 3% |
| Sunday Night | 43°F | Mostly Clear | 3 mph ENE | 0% |
| Monday | 76°F | Sunny | 5 mph NNE | 0% |
| Monday Night | 45°F | Mostly Clear | 3 mph ENE | 0% |
| Tuesday | 76°F | Mostly Sunny | 5 mph NNE | 1% |
| Tuesday Night | 49°F | Slight Chance Showers And Thunderstorms then Slight Chance Light Rain | 5 mph SSE | 16% |
| Wednesday | 76°F | Mostly Sunny | 3 to 7 mph SSW | 8% |
| Wednesday Night | 48°F | Mostly Clear | 3 to 7 mph SSE | 3% |
| Thursday | 80°F | Sunny | 6 mph SSE | 2% |
| Thursday Night | 50°F | Mostly Clear | 6 mph SSE | 1% |
| Friday | 80°F | Mostly Sunny | 5 to 8 mph SE | 4% |
| Friday Night | 51°F | Partly Cloudy | 9 mph S | 8% |
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 Sep 19, 2026.