Princeton, ID Weather & Growing Conditions
Tonight
49°F
Mostly Clear
Mostly clear, with a low around 49. Northeast wind around 1 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 49°F | Mostly Clear | 1 mph NE | 1% |
| Sunday | 78°F | Sunny | 0 to 3 mph SE | 0% |
| Sunday Night | 50°F | Mostly Clear | 2 mph E | 0% |
| Monday | 80°F | Sunny | 3 mph S | 0% |
| Monday Night | 53°F | Mostly Clear | 2 mph SW | 0% |
| Tuesday | 77°F | Mostly Sunny | 0 to 5 mph SW | 1% |
| Tuesday Night | 50°F | Partly Cloudy | 0 to 3 mph W | 4% |
| Wednesday | 70°F | Mostly Sunny | 0 to 5 mph W | 3% |
| Wednesday Night | 48°F | Partly Cloudy | 3 mph E | 4% |
| Thursday | 70°F | Mostly Sunny | 3 mph E | 4% |
| Thursday Night | 48°F | Partly Cloudy | 2 mph NE | 11% |
| Friday | 66°F | Slight Chance Rain Showers | 1 to 5 mph SW | 16% |
| Friday Night | 45°F | Mostly Cloudy | 1 to 5 mph W | 12% |
| Saturday | 63°F | Mostly Sunny | 3 mph W | 12% |
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 (6.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.