Princeton, ID Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Princeton, a community in Latah County, Idaho.
This Afternoon
44°F
Mostly Sunny
Mostly sunny. High near 44, with temperatures falling to around 37 in the afternoon. West wind around 2 mph.
7-day forecast for Princeton
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 44°F | Mostly Sunny | 2 mph W | 1% |
| Tonight | 35°F | Mostly Cloudy then Light Rain Likely | 0 to 3 mph E | 67% |
| Thursday | 48°F | Light Rain Likely | 5 mph SW | 67% |
| Thursday Night | 35°F | Partly Cloudy | 2 to 6 mph SE | 1% |
| Friday | 47°F | Partly Sunny | 3 to 7 mph SE | 2% |
| Friday Night | 39°F | Mostly Cloudy | 5 mph SE | 6% |
| Saturday | 60°F | Mostly Sunny | 5 to 8 mph SE | 2% |
| Saturday Night | 41°F | Mostly Cloudy then Slight Chance Rain Showers | 5 to 8 mph SE | 15% |
| Sunday | 55°F | Slight Chance Rain Showers then Mostly Cloudy | 5 to 9 mph S | 15% |
| Sunday Night | 37°F | Mostly Cloudy | 5 mph S | 12% |
| Monday | 53°F | Mostly Cloudy | 1 to 5 mph SE | 5% |
| Monday Night | 38°F | Mostly Cloudy then Slight Chance Rain Showers | 0 to 5 mph SE | 16% |
| Tuesday | 55°F | Slight Chance Rain Showers | 6 mph SE | 21% |
| Tuesday Night | 41°F | Slight Chance Rain Showers | 6 mph SE | 21% |
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 Nov 5, 2026.