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.
Overnight
28°F
Patchy Fog
Patchy fog. Cloudy. Low around 28, with temperatures rising to around 32 overnight. Southwest wind around 5 mph.
7-day forecast for St. Charles
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 28°F | Patchy Fog | 5 mph SW | 3% |
| Wednesday | 50°F | Patchy Fog then Mostly Cloudy | 3 mph NNW | 6% |
| Wednesday Night | 26°F | Areas Of Fog | 3 mph NNW | 2% |
| Thursday | 48°F | Areas Of Fog then Mostly Cloudy | 2 mph W | 12% |
| Thursday Night | 27°F | Areas Of Fog | 5 mph WNW | 12% |
| Friday | 49°F | Sunny | 3 mph WNW | 1% |
| Friday Night | 25°F | Partly Cloudy | 3 mph WNW | 0% |
| Saturday | 53°F | Sunny | 1 mph N | 0% |
| Saturday Night | 29°F | Mostly Clear | 2 mph SSE | 0% |
| Sunday | 57°F | Sunny | 2 mph S | 0% |
| Sunday Night | 31°F | Partly Cloudy | 0 to 3 mph SSW | 0% |
| Monday | 57°F | Mostly Sunny | 2 mph SE | 0% |
| Monday Night | 32°F | Mostly Cloudy | 2 mph SW | 0% |
| Tuesday | 56°F | Mostly Sunny | 2 mph SSW | 1% |
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.