Prosper, TX 75078 Frost Dates
Frost dates for Prosper, TX, ZIP 75078
Typically, the last spring freeze lands around 03/17, roughly 201 days out. The first fall frost typically arrives around 11/15, about 241 frost-free days later.
Prosper 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.
What to do before the first frost
Zone 8b around Prosper has about 11 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
The actual range around Prosper's last frost
03/17 is the middle of 30 years of NOAA records, not a promise. Plant by 02/27 and you're betting against frost in roughly 9 years out of 10. 04/05 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Prosper compares
At roughly 241 frost-free days, Prosper places 8,508 of 40,283 ZIP codes in this dataset. Within TX, it ranks 1,892 of 2,558.
Learn more
local microclimates explains what one yard in Prosper can differ from the 75078 normal, and zone vs. frost date explains why Zone 8b and Prosper's frost date answer different questions.