Brenham, TX 77833 Frost Dates
Brenham, TX: when does the frost end?
Typically, the last spring freeze lands around 03/02, roughly 186 days out. Fall's first freeze usually shows up around 11/30, roughly 273 days after the last spring frost.
Brenham sits in USDA Zone 9a (20 to 25°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 13 weeks until Brenham's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 03/02 isn't a guarantee
03/02 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 01/31 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 03/20 and only about 1 year in 10 sees frost after that.
Brenham against the rest of the dataset
At roughly 273 frost-free days, Brenham places 5,195 of 40,283 ZIP codes in this dataset. Within TX, it ranks 866 of 2,558.
Learn more
Before leaning on 77833's figures: zone vs. frost date explains why Zone 9a and Brenham's frost date answer different questions, while the frost range explains how to read the range around Brenham's dates instead of trusting one.