Princeton, TX Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Princeton, a city in Collin County, Texas.
This Afternoon
97°F
Mostly Sunny
Mostly sunny, with a high near 97. Heat index values as high as 97. South wind around 10 mph.
7-day forecast for Princeton
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 97°F | Mostly Sunny | 10 mph S | 0% |
| Tonight | 76°F | Mostly Clear | 10 mph S | 0% |
| Sunday | 98°F | Mostly Sunny | 10 mph S | 8% |
| Sunday Night | 74°F | Chance Showers And Thunderstorms | 0 to 10 mph SSW | 43% |
| Monday | 94°F | Chance Showers And Thunderstorms | 5 mph SSE | 43% |
| Monday Night | 71°F | Chance Showers And Thunderstorms then Partly Cloudy | 5 to 10 mph NNE | 37% |
| Tuesday | 92°F | Mostly Sunny | 10 mph NNE | 10% |
| Tuesday Night | 68°F | Partly Cloudy | 5 to 10 mph NE | 5% |
| Wednesday | 93°F | Sunny | 10 mph ENE | 5% |
| Wednesday Night | 69°F | Partly Cloudy | 5 to 10 mph ENE | 2% |
| Thursday | 93°F | Mostly Sunny | 5 to 10 mph E | 1% |
| Thursday Night | 69°F | Partly Cloudy | 5 mph E | 0% |
| Friday | 93°F | Partly Sunny | 5 mph ESE | 2% |
| Friday Night | 71°F | Mostly Cloudy | 5 mph E | 2% |
Forecast source: National Weather Service (api.weather.gov) for Princeton (33.202, -96.518). Updated through the day.
Growing snapshot for Princeton
Last spring frost
Mar 18
First fall frost
Nov 11
Growing season
239 days
Hardiness zone
8b
More local growing data for Princeton: nearby ZIP 75407 weather · frost dates · planting calendar · Texas frost dates
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Climate data from the nearest NOAA station, Mckinney Muni Ap, Tx (6.6 mi from Princeton). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.