Princeton, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Princeton, a city in Mercer County, Missouri.
This Afternoon
85°F
Mostly Sunny
Mostly sunny, with a high near 85. Southwest wind around 7 mph.
7-day forecast for Princeton
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 85°F | Mostly Sunny | 7 mph SW | 6% |
| Tonight | 65°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 2 to 7 mph NNW | 69% |
| Sunday | 70°F | Chance Showers And Thunderstorms | 5 to 9 mph N | 39% |
| Sunday Night | 59°F | Showers And Thunderstorms Likely | 10 mph NE | 56% |
| Monday | 62°F | Rain Showers Likely | 10 mph NE | 66% |
| Monday Night | 53°F | Showers And Thunderstorms Likely | 9 mph NNE | 55% |
| Tuesday | 60°F | Mostly Cloudy | 9 mph NNE | 8% |
| Tuesday Night | 48°F | Partly Cloudy | 3 to 7 mph NE | 6% |
| Wednesday | 63°F | Mostly Sunny | 6 mph NE | 0% |
| Wednesday Night | 51°F | Partly Cloudy | 3 mph ENE | 2% |
| Thursday | 68°F | Partly Sunny | 3 mph ESE | 14% |
| Thursday Night | 57°F | Chance Rain Showers | 2 mph E | 27% |
| Friday | 71°F | Chance Rain Showers | 5 mph E | 27% |
| Friday Night | 59°F | Mostly Cloudy | 3 mph E | 13% |
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 20, 2026.