Princeton, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Princeton, a city in Mercer County, Missouri.
Overnight
66°F
Partly Cloudy
Partly cloudy, with a low around 66. South southeast wind around 7 mph.
7-day forecast for Princeton
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 66°F | Partly Cloudy | 7 mph SSE | 0% |
| Tuesday | 89°F | Mostly Sunny | 7 mph S | 13% |
| Tuesday Night | 67°F | Chance Showers And Thunderstorms | 3 to 8 mph NE | 50% |
| Wednesday | 78°F | Showers And Thunderstorms Likely | 8 mph NE | 74% |
| Wednesday Night | 63°F | Showers And Thunderstorms Likely | 5 to 9 mph NNE | 63% |
| Thursday | 82°F | Showers And Thunderstorms Likely then Mostly Sunny | 5 mph ENE | 63% |
| Thursday Night | 64°F | Mostly Clear | 3 mph E | 4% |
| Friday | 86°F | Mostly Sunny | 2 to 7 mph SSE | 7% |
| Friday Night | 68°F | Mostly Clear | 2 to 6 mph S | 11% |
| Saturday | 89°F | Sunny | 3 to 10 mph S | 7% |
| Saturday Night | 72°F | Mostly Clear | 12 mph S | 8% |
| Sunday | 92°F | Sunny | 9 to 15 mph SSW | 8% |
| Sunday Night | 73°F | Partly Cloudy | 9 to 15 mph S | 11% |
| Monday | 93°F | Mostly Sunny | 9 to 16 mph SSW | 11% |
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 Aug 4, 2026.