Idaho Falls, ID Weather & Growing Conditions
Tonight
39°F
Isolated Rain Showers
Isolated rain showers before 1am. Partly cloudy. Low around 39, with temperatures rising to around 43 overnight. Northwest wind around 5 mph. Chance of precipitation is 20%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 39°F | Isolated Rain Showers | 5 mph NW | 20% |
| Sunday | 67°F | Mostly Sunny | 3 mph NW | 3% |
| Sunday Night | 40°F | Mostly Clear | 2 to 6 mph ENE | 0% |
| Monday | 73°F | Sunny | 3 to 7 mph NNW | 0% |
| Monday Night | 42°F | Mostly Clear | 6 mph NE | 0% |
| Tuesday | 75°F | Mostly Sunny | 3 to 7 mph N | 1% |
| Tuesday Night | 46°F | Slight Chance Light Rain | 6 mph SSE | 17% |
| Wednesday | 75°F | Mostly Sunny | 7 mph S | 8% |
| Wednesday Night | 45°F | Mostly Clear | 3 to 7 mph S | 3% |
| Thursday | 79°F | Sunny | 6 mph SE | 1% |
| Thursday Night | 47°F | Mostly Clear | 6 mph SE | 1% |
| Friday | 79°F | Mostly Sunny | 5 to 8 mph NE | 5% |
| Friday Night | 47°F | Partly Cloudy | 6 to 10 mph S | 9% |
| Saturday | 74°F | Mostly Sunny | 6 to 10 mph SSW | 11% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Idaho Falls, ID
Last spring frost
May 23
First fall frost
Sep 20
Growing season
114 days
Hardiness zone
5b
Explore more for Idaho Falls, ID: full frost dates · planting calendar · Idaho frost dates
Climate data from the nearest NOAA station, Idaho Falls Fanning Fld, Id (5.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.