Bancroft, ID Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Bancroft, a city in Caribou County, Idaho.
Tonight
40°F
Showers And Thunderstorms Likely then Chance Showers And Thunderstorms
Showers and thunderstorms likely before 10pm, then a chance of showers and thunderstorms between 10pm and 1am. Mostly cloudy. Low around 40, with temperatures rising to around 43 overnight. Northwest wind 0 to 3 mph. Chance of precipitation is 60%.
7-day forecast for Bancroft
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 40°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 0 to 3 mph NW | 60% |
| Saturday | 61°F | Slight Chance Showers And Thunderstorms | 0 to 6 mph SW | 60% |
| Saturday Night | 38°F | Mostly Cloudy | 2 mph WNW | 14% |
| Sunday | 68°F | Mostly Sunny | 0 to 3 mph W | 1% |
| Sunday Night | 39°F | Mostly Clear | 0 to 3 mph N | 0% |
| Monday | 73°F | Sunny | 2 mph NW | 0% |
| Monday Night | 42°F | Partly Cloudy | 2 mph NNE | 0% |
| Tuesday | 74°F | Mostly Sunny | 0 to 3 mph SE | 4% |
| Tuesday Night | 43°F | Partly Cloudy | 2 mph ESE | 12% |
| Wednesday | 74°F | Sunny | 5 mph S | 6% |
| Wednesday Night | 42°F | Mostly Clear | 2 mph SE | 4% |
| Thursday | 76°F | Sunny | 1 to 5 mph SSE | 3% |
| Thursday Night | 44°F | Partly Cloudy | 5 mph SSE | 2% |
| Friday | 76°F | Mostly Sunny | 2 to 7 mph S | 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 Sep 19, 2026.