Princeton, ID Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Princeton, a community in Latah County, Idaho.
Today
84°F
Haze
Haze and areas of smoke before 5pm. Sunny, with a high near 84. North wind 2 to 6 mph.
7-day forecast for Princeton
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 84°F | Haze | 2 to 6 mph N | 0% |
| Tonight | 48°F | Patchy Smoke | 1 to 5 mph NE | 0% |
| Wednesday | 90°F | Sunny | 3 mph S | 0% |
| Wednesday Night | 52°F | Patchy Smoke then Clear | 3 mph NE | 0% |
| Thursday | 95°F | Sunny | 5 mph S | 0% |
| Thursday Night | 55°F | Clear | 0 to 5 mph SE | 0% |
| Friday | 93°F | Sunny | 2 to 10 mph SW | 0% |
| Friday Night | 55°F | Clear | 2 to 9 mph SW | 0% |
| Saturday | 89°F | Sunny | 2 to 9 mph SW | 0% |
| Saturday Night | 53°F | Mostly Clear | 2 to 8 mph SW | 0% |
| Sunday | 85°F | Sunny | 2 to 8 mph W | 0% |
| Sunday Night | 51°F | Mostly Clear | 0 to 7 mph W | 0% |
| Monday | 84°F | Sunny | 1 to 6 mph W | 0% |
| Monday Night | 50°F | Mostly Clear | 0 to 6 mph NW | 1% |
Forecast source: National Weather Service (api.weather.gov) for Princeton (46.917, -116.826). Updated through the day.
Growing snapshot for Princeton
Last spring frost
May 15
First fall frost
Sep 21
Growing season
126 days
Hardiness zone
6b
More local growing data for Princeton: nearby ZIP 83857 weather · frost dates · planting calendar · Idaho frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Potlatch 3 Nne, Id (5.5 mi from Princeton). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.