Richardson, TX 75080 Frost Dates
75080, near Richardson, TX: the frost window
The last spring frost here typically falls around 03/07, about 191 days from today. Fall's first freeze usually shows up around 11/21, roughly 259 days after the last spring frost.
Zone 8b (15 to 20°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Richardson, not a forecast for this year.
Stretching the season past the first frost
Richardson's growing season runs out in roughly 12 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
The actual range around Richardson's last frost
03/07 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/18 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 03/29 and only about 1 year in 10 sees frost after that.
Richardson against the rest of the dataset
Richardson's growing season runs about 259 days, ranking 6,531 of 40,283 US ZIP codes measured here, longest to shortest. Within TX, it ranks 1,359 of 2,558.
Learn more
Two guides worth reading on 75080: zone vs. frost date, on why Zone 8b and Richardson's frost date answer different questions, and the frost range, on how to read the range around Richardson's dates instead of trusting one.