Princeton, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Princeton, a city in Mercer County, Missouri.
Tonight
72°F
Partly Cloudy then Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms between 4am and 5am. Partly cloudy, with a low around 72. South wind around 8 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Princeton
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 72°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 8 mph S | 15% |
| Saturday | 85°F | Slight Chance Showers And Thunderstorms then Partly Sunny | 6 to 10 mph SW | 18% |
| Saturday Night | 65°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 5 mph N | 73% |
| Sunday | 73°F | Chance Showers And Thunderstorms | 5 to 10 mph N | 52% |
| Sunday Night | 60°F | Chance Showers And Thunderstorms | 10 mph NE | 52% |
| Monday | 64°F | Chance Rain Showers | 10 mph NE | 51% |
| Monday Night | 54°F | Chance Rain Showers | 9 mph NE | 45% |
| Tuesday | 61°F | Mostly Cloudy | 9 mph NE | 10% |
| Tuesday Night | 49°F | Mostly Cloudy | 3 to 7 mph NE | 4% |
| Wednesday | 65°F | Mostly Sunny | 6 mph NE | 1% |
| Wednesday Night | 52°F | Partly Cloudy | 3 mph ENE | 4% |
| Thursday | 66°F | Partly Sunny | 5 mph E | 12% |
| Thursday Night | 55°F | Mostly Cloudy | 2 mph E | 13% |
| Friday | 68°F | Slight Chance Rain Showers | 2 to 6 mph E | 16% |
Forecast source: National Weather Service (api.weather.gov) for Princeton (40.396, -93.589). Updated through the day.
Growing snapshot for Princeton
Last spring frost
Apr 25
First fall frost
Oct 15
Growing season
174 days
Hardiness zone
5b
More local growing data for Princeton: nearby ZIP 64673 weather · frost dates · planting calendar · Missouri frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Princeton, Mo (1.7 mi from Princeton). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.