Bancroft, ID Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Bancroft, a city in Caribou County, Idaho.
Overnight
41°F
Patchy Smoke
Patchy smoke. Mostly clear, with a low around 41. Wind around 0 mph.
7-day forecast for Bancroft
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 41°F | Patchy Smoke | 0 mph | 0% |
| Tuesday | 81°F | Patchy Smoke | 0 to 10 mph NNW | 0% |
| Tuesday Night | 43°F | Patchy Smoke | 2 to 10 mph SSW | 0% |
| Wednesday | 85°F | Areas Of Smoke | 1 to 9 mph SW | 0% |
| Wednesday Night | 47°F | Mostly Clear | 2 to 9 mph SSW | 0% |
| Thursday | 91°F | Sunny | 1 to 10 mph SSW | 0% |
| Thursday Night | 54°F | Mostly Clear | 2 to 9 mph SSW | 0% |
| Friday | 94°F | Sunny | 1 to 10 mph SSW | 0% |
| Friday Night | 57°F | Mostly Clear | 2 to 14 mph SW | 0% |
| Saturday | 94°F | Sunny | 0 to 10 mph W | 0% |
| Saturday Night | 59°F | Partly Cloudy | 1 to 13 mph S | 0% |
| Sunday | 93°F | Mostly Sunny | 1 to 12 mph SSW | 2% |
| Sunday Night | 58°F | Partly Cloudy | 2 to 13 mph S | 1% |
| Monday | 91°F | Sunny | 1 to 10 mph SW | 4% |
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 Aug 4, 2026.