Princeton, ID Weather & Growing Conditions
This Afternoon
42°F
Mostly Sunny
Mostly sunny. High near 42, with temperatures falling to around 36 in the afternoon. West wind around 2 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 42°F | Mostly Sunny | 2 mph W | 0% |
| Tonight | 36°F | Mostly Cloudy then Light Rain Likely | 0 to 3 mph SE | 67% |
| Thursday | 46°F | Light Rain Likely | 1 to 5 mph SW | 67% |
| Thursday Night | 34°F | Partly Cloudy | 1 to 7 mph SE | 1% |
| Friday | 44°F | Partly Sunny | 3 to 8 mph SE | 1% |
| Friday Night | 39°F | Mostly Cloudy | 6 mph SE | 6% |
| Saturday | 57°F | Mostly Sunny | 7 mph SE | 2% |
| Saturday Night | 42°F | Mostly Cloudy then Slight Chance Rain Showers | 7 mph SE | 15% |
| Sunday | 52°F | Slight Chance Rain Showers then Mostly Cloudy | 5 to 8 mph S | 15% |
| Sunday Night | 38°F | Slight Chance Rain Showers | 1 to 5 mph S | 15% |
| Monday | 50°F | Mostly Cloudy | 1 to 5 mph SE | 4% |
| Monday Night | 37°F | Mostly Cloudy | 0 to 5 mph SE | 14% |
| Tuesday | 53°F | Slight Chance Rain Showers | 5 mph SE | 21% |
| Tuesday Night | 41°F | Slight Chance Rain Showers | 2 to 7 mph SE | 21% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Princeton, ID
Last spring frost
May 15
First fall frost
Sep 21
Growing season
126 days
Hardiness zone
6b
Explore more for Princeton, ID: full frost dates · planting calendar · Idaho frost dates
Climate data from the nearest NOAA station, Potlatch 3 Nne, Id (5.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 5, 2026.