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.
Today
82°F
Patchy Smoke
Patchy smoke. Sunny, with a high near 82. Southwest wind 3 to 9 mph, with gusts as high as 20 mph.
7-day forecast for St. Charles
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 82°F | Patchy Smoke | 3 to 9 mph SW | 0% |
| Tonight | 45°F | Patchy Smoke | 2 to 9 mph WNW | 0% |
| Wednesday | 84°F | Areas Of Smoke | 2 to 8 mph W | 0% |
| Wednesday Night | 49°F | Mostly Clear | 2 to 7 mph SW | 0% |
| Thursday | 88°F | Sunny | 2 to 9 mph SW | 0% |
| Thursday Night | 54°F | Clear | 3 to 7 mph SSW | 0% |
| Friday | 90°F | Sunny | 2 to 8 mph SW | 0% |
| Friday Night | 56°F | Mostly Clear | 2 to 8 mph W | 0% |
| Saturday | 91°F | Sunny | 2 to 8 mph ESE | 0% |
| Saturday Night | 58°F | Mostly Clear | 3 to 8 mph W | 0% |
| Sunday | 90°F | Mostly Sunny | 2 to 8 mph S | 4% |
| Sunday Night | 57°F | Partly Cloudy | 3 to 8 mph WSW | 4% |
| Monday | 88°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 2 to 8 mph SSW | 15% |
| Monday Night | 56°F | Partly Cloudy | 3 to 8 mph SW | 8% |
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 Aug 4, 2026.