Sullivan City, TX 78565 Frost Dates
Sullivan City, TX: when does the frost end?
Typically, the last spring freeze lands around 01/31, roughly 156 days out. Fall's first freeze usually shows up around 12/17, roughly 321 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Sullivan City in Zone 10a (30 to 35°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 16 weeks until Sullivan City's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
01/31 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/04 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 12/29 and only about 1 year in 10 sees frost after that.
Sullivan City against the rest of the dataset
About 321 days separate Sullivan City's last and first frost, putting it 3,303 of 40,283 ZIP codes nationally. Within TX, it ranks 212 of 2,558.
Learn more
Before leaning on 78565's figures: zone vs. frost date explains why Zone 10a and Sullivan City's frost date answer different questions, while the frost range explains how to read the range around Sullivan City's dates instead of trusting one.