St. Charles, ID Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for St. Charles, a city in Bear Lake County, Idaho.
Tonight
28°F
Mostly Cloudy then Patchy Fog
Patchy fog after 1am. Mostly cloudy. Low around 28, with temperatures rising to around 32 overnight. South southwest wind 3 to 7 mph.
7-day forecast for St. Charles
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 28°F | Mostly Cloudy then Patchy Fog | 3 to 7 mph SSW | 2% |
| Wednesday | 50°F | Patchy Fog then Mostly Cloudy | 3 mph NNW | 6% |
| Wednesday Night | 25°F | Areas Of Fog | 3 mph NW | 0% |
| Thursday | 49°F | Areas Of Fog then Slight Chance Light Rain | 2 mph WSW | 15% |
| Thursday Night | 25°F | Slight Chance Rain And Snow then Areas Of Fog | 3 mph NW | 15% |
| Friday | 50°F | Mostly Sunny | 3 mph NW | 2% |
| Friday Night | 25°F | Partly Cloudy | 3 mph WNW | 2% |
| Saturday | 53°F | Sunny | 1 mph NNW | 0% |
| Saturday Night | 28°F | Mostly Clear | 2 mph SSE | 0% |
| Sunday | 57°F | Sunny | 2 mph SSE | 0% |
| Sunday Night | 30°F | Partly Cloudy | 2 mph SW | 1% |
| Monday | 57°F | Mostly Sunny | 2 mph SSE | 1% |
| Monday Night | 32°F | Partly Cloudy | 2 mph W | 3% |
| Tuesday | 56°F | Mostly Sunny | 2 mph WSW | 6% |
Forecast source: National Weather Service (api.weather.gov) for St. Charles (42.112, -111.390). Updated through the day.
Growing snapshot for St. Charles
Last spring frost
May 19
First fall frost
Sep 21
Growing season
123 days
Hardiness zone
5a
More local growing data for St. Charles: nearby ZIP 83272 weather · frost dates · planting calendar · Idaho frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Lifton Pumping Stn, Id (4 mi from St. Charles). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.