Rosenberg, TX 77471 Frost Dates
Rosenberg, TX: when does the frost end?
Typically, the last spring freeze lands around 02/09, roughly 165 days out. Fall's first freeze usually shows up around 12/13, roughly 305 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Rosenberg in Zone 9a (20 to 25°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
With roughly 15 weeks until Rosenberg's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Rosenberg's last frost
02/09 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 01/13 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 03/11 and only about 1 year in 10 sees frost after that.
Rosenberg against the rest of the dataset
About 305 days separate Rosenberg's last and first frost, putting it 3,734 of 40,283 ZIP codes nationally. Within TX, it ranks 286 of 2,558.
Learn more
Before leaning on 77471's figures: zone vs. frost date explains why Zone 9a and Rosenberg's frost date answer different questions, while the frost range explains how to read the range around Rosenberg's dates instead of trusting one.