Spencer, ID Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Spencer, a city in Clark County, Idaho.
Overnight
29°F
Mostly Cloudy
Mostly cloudy. Low around 29, with temperatures rising to around 31 overnight. North wind around 12 mph, with gusts as high as 18 mph.
7-day forecast for Spencer
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 29°F | Mostly Cloudy | 12 mph N | 1% |
| Wednesday | 48°F | Partly Sunny | 3 to 12 mph WNW | 1% |
| Wednesday Night | 28°F | Partly Cloudy | 2 to 6 mph ESE | 0% |
| Thursday | 39°F | Mostly Cloudy | 3 to 8 mph SSE | 7% |
| Thursday Night | 27°F | Partly Cloudy | 3 mph ENE | 7% |
| Friday | 36°F | Partly Sunny | 3 to 7 mph SE | 1% |
| Friday Night | 27°F | Mostly Cloudy | 5 mph ENE | 0% |
| Saturday | 43°F | Mostly Sunny | 2 to 6 mph SSE | 0% |
| Saturday Night | 30°F | Partly Cloudy | 2 to 6 mph E | 0% |
| Sunday | 46°F | Mostly Sunny | 3 to 9 mph SE | 0% |
| Sunday Night | 31°F | Partly Cloudy | 6 mph ENE | 0% |
| Monday | 48°F | Partly Sunny | 2 to 6 mph ESE | 0% |
| Monday Night | 33°F | Mostly Cloudy | 5 mph ENE | 0% |
| Tuesday | 47°F | Mostly Sunny | 2 to 6 mph ESE | 4% |
Forecast source: National Weather Service (api.weather.gov) for Spencer (44.368, -112.184). Updated through the day.
Growing snapshot for Spencer
Last spring frost
May 18
First fall frost
Sep 30
Growing season
132 days
Hardiness zone
5b
More local growing data for Spencer: nearby ZIP 83446 weather · frost dates · planting calendar · Idaho frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Dubois Exp Stn, Id (8.4 mi from Spencer). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.