Princeton, ID Weather & Growing Conditions
Today
50°F
Patchy Fog then Sunny
Patchy fog between 7am and 8am. Sunny. High near 50, with temperatures falling to around 44 in the afternoon. Northwest wind around 2 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 50°F | Patchy Fog then Sunny | 2 mph NW | 1% |
| Tonight | 36°F | Mostly Cloudy then Rain Showers | 0 to 3 mph SE | 84% |
| Thursday | 46°F | Rain Showers | 2 to 6 mph SW | 84% |
| Thursday Night | 34°F | Partly Cloudy | 2 to 6 mph S | 2% |
| Friday | 48°F | Partly Sunny | 3 to 7 mph SE | 4% |
| Friday Night | 39°F | Mostly Cloudy | 6 mph SE | 8% |
| Saturday | 58°F | Mostly Sunny | 7 mph SE | 3% |
| Saturday Night | 41°F | Mostly Cloudy then Slight Chance Rain Showers | 7 mph SE | 15% |
| Sunday | 53°F | Slight Chance Rain Showers | 3 to 8 mph SW | 15% |
| Sunday Night | 39°F | Mostly Cloudy | 5 mph S | 6% |
| Monday | 54°F | Partly Sunny then Slight Chance Rain Showers | 0 to 5 mph SE | 15% |
| Monday Night | 38°F | Slight Chance Rain Showers | 0 to 3 mph SE | 16% |
| Tuesday | 53°F | Slight Chance Rain Showers | 5 mph SE | 22% |
| Tuesday Night | 41°F | Slight Chance Rain Showers | 2 to 7 mph SE | 22% |
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 4, 2026.