St. Anthony, ID Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for St. Anthony, a city in Fremont County, Idaho.
This Afternoon
49°F
Mostly Sunny
Mostly sunny. High near 49, with temperatures falling to around 46 in the afternoon. North wind around 3 mph.
7-day forecast for St. Anthony
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 49°F | Mostly Sunny | 3 mph N | 0% |
| Tonight | 29°F | Mostly Cloudy | 3 to 7 mph NE | 0% |
| Wednesday | 51°F | Patchy Fog then Partly Sunny | 2 to 7 mph SSW | 1% |
| Wednesday Night | 26°F | Areas Of Fog | 5 mph E | 0% |
| Thursday | 47°F | Patchy Fog then Slight Chance Light Rain | 2 to 7 mph S | 17% |
| Thursday Night | 28°F | Slight Chance Light Rain then Areas Of Fog | 3 mph SSE | 17% |
| Friday | 45°F | Partly Sunny | 2 to 7 mph SSW | 3% |
| Friday Night | 26°F | Partly Cloudy | 3 mph E | 3% |
| Saturday | 50°F | Mostly Sunny | 3 mph NNE | 0% |
| Saturday Night | 28°F | Partly Cloudy | 1 to 5 mph N | 0% |
| Sunday | 54°F | Mostly Sunny | 2 to 6 mph NNW | 0% |
| Sunday Night | 31°F | Partly Cloudy | 3 mph ENE | 0% |
| Monday | 55°F | Mostly Sunny | 3 mph NNW | 1% |
| Monday Night | 32°F | Mostly Cloudy | 3 mph NE | 2% |
Forecast source: National Weather Service (api.weather.gov) for St. Anthony (43.966, -111.685). Updated through the day.
Growing snapshot for St. Anthony
Last spring frost
May 17
First fall frost
Sep 22
Growing season
126 days
Hardiness zone
5a
More local growing data for St. Anthony: nearby ZIP 83438 weather · frost dates · planting calendar · Idaho frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Saint Anthony, Id (4 mi from St. Anthony). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.