Princeton, TX 75407 Frost Dates
Princeton, TX: when does the frost end?
Around 03/18 is the usual last spring frost, about 202 days away. Fall's first freeze usually shows up around 11/11, roughly 239 days after the last spring frost.
Princeton sits in USDA Zone 8b (15 to 20°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
Stretching the season past the first frost
With roughly 11 weeks until Princeton's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 03/18 isn't a guarantee
03/18 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/28 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/07 and only about 1 year in 10 sees frost after that.
Princeton against the rest of the dataset
Princeton's growing season runs about 239 days, ranking 8,779 of 40,283 US ZIP codes measured here, longest to shortest. Within TX, it ranks 1,949 of 2,558.
Learn more
Before leaning on 75407's figures: local microclimates explains what one yard in Princeton can differ from the 75407 normal, while zone vs. frost date explains why Zone 8b and Princeton's frost date answer different questions.