St. Charles, ID Weather & Growing Conditions
Overnight
29°F
Cloudy
Cloudy. Low around 29, with temperatures rising to around 33 overnight. South southwest wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 29°F | Cloudy | 5 mph SSW | 3% |
| Wednesday | 50°F | Mostly Cloudy | 3 mph NW | 6% |
| Wednesday Night | 27°F | Areas Of Fog | 3 mph NNW | 2% |
| Thursday | 48°F | Areas Of Fog then Mostly Cloudy | 2 mph NNW | 12% |
| Thursday Night | 27°F | Areas Of Fog | 5 mph WNW | 12% |
| Friday | 49°F | Sunny | 2 mph WNW | 1% |
| Friday Night | 26°F | Partly Cloudy | 2 mph WNW | 0% |
| Saturday | 52°F | Sunny | 1 mph N | 0% |
| Saturday Night | 30°F | Mostly Clear | 0 to 3 mph SSE | 0% |
| Sunday | 57°F | Sunny | 0 to 3 mph SSE | 0% |
| Sunday Night | 32°F | Partly Cloudy | 2 mph SW | 0% |
| Monday | 57°F | Mostly Sunny | 2 mph ESE | 0% |
| Monday Night | 33°F | Mostly Cloudy | 2 mph SW | 0% |
| Tuesday | 56°F | Mostly Sunny | 2 mph SSW | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for St. Charles, ID
Last spring frost
May 19
First fall frost
Sep 21
Growing season
123 days
Hardiness zone
5a
Explore more for St. Charles, ID: full frost dates · planting calendar · Idaho frost dates
Climate data from the nearest NOAA station, Lifton Pumping Stn, Id (4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.