Bancroft, ID Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Bancroft, a city in Caribou County, Idaho.
Tonight
29°F
Areas Of Fog
Areas of fog between 11pm and 4am. Mostly cloudy. Low around 29, with temperatures rising to around 31 overnight. Northeast wind around 2 mph.
7-day forecast for Bancroft
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 29°F | Areas Of Fog | 2 mph NE | 2% |
| Wednesday | 49°F | Patchy Fog then Mostly Cloudy | 1 to 6 mph NW | 2% |
| Wednesday Night | 26°F | Areas Of Fog | 0 to 3 mph NNW | 0% |
| Thursday | 46°F | Areas Of Fog then Partly Sunny | 0 to 3 mph SW | 12% |
| Thursday Night | 26°F | Areas Of Fog | 2 mph W | 12% |
| Friday | 47°F | Mostly Sunny | 0 to 3 mph W | 1% |
| Friday Night | 26°F | Partly Cloudy | 2 mph S | 1% |
| Saturday | 52°F | Sunny | 2 mph S | 0% |
| Saturday Night | 28°F | Mostly Clear | 0 to 3 mph SSE | 0% |
| Sunday | 56°F | Sunny | 3 to 9 mph S | 0% |
| Sunday Night | 31°F | Partly Cloudy | 5 mph SSE | 1% |
| Monday | 57°F | Mostly Sunny | 5 mph S | 1% |
| Monday Night | 32°F | Mostly Cloudy | 0 to 3 mph SSE | 3% |
| Tuesday | 55°F | Mostly Sunny | 0 to 3 mph SW | 6% |
Forecast source: National Weather Service (api.weather.gov) for Bancroft (42.720, -111.883). Updated through the day.
Growing snapshot for Bancroft
Last spring frost
May 21
First fall frost
Sep 21
Growing season
118 days
Hardiness zone
5a
More local growing data for Bancroft: nearby ZIP 83217 weather · frost dates · planting calendar · Idaho frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Lava Hot Springs, Id (11.1 mi from Bancroft). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.