Ammon, ID Weather & Growing Conditions
Today
47°F
Partly Sunny
Partly sunny. High near 47, with temperatures falling to around 43 in the afternoon. West wind 5 to 9 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 47°F | Partly Sunny | 5 to 9 mph W | 1% |
| Tonight | 29°F | Patchy Fog | 5 to 9 mph SSE | 1% |
| Thursday | 46°F | Mostly Cloudy | 5 to 10 mph SSW | 9% |
| Thursday Night | 30°F | Patchy Fog then Partly Cloudy | 7 mph SSW | 9% |
| Friday | 44°F | Mostly Sunny | 3 to 9 mph SSW | 0% |
| Friday Night | 28°F | Partly Cloudy | 3 to 8 mph S | 0% |
| Saturday | 49°F | Sunny | 1 to 9 mph WSW | 0% |
| Saturday Night | 32°F | Partly Cloudy | 1 to 15 mph SE | 0% |
| Sunday | 56°F | Mostly Sunny | 5 to 18 mph S | 0% |
| Sunday Night | 35°F | Partly Cloudy | 5 to 15 mph S | 0% |
| Monday | 56°F | Mostly Sunny | 2 to 15 mph S | 0% |
| Monday Night | 36°F | Mostly Cloudy | 2 to 13 mph S | 1% |
| Tuesday | 54°F | Mostly Sunny | 2 to 13 mph S | 2% |
| Tuesday Night | 36°F | Partly Cloudy | 2 to 13 mph S | 8% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Ammon, ID
Last spring frost
Jun 9
First fall frost
Sep 11
Growing season
93 days
Hardiness zone
5b
Explore more for Ammon, ID: full frost dates · planting calendar · Idaho frost dates
Climate data from the nearest NOAA station, Idaho Falls 16 Se, Id (1.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.