Alderson, OK 74522 Frost Dates
Frost dates for Alderson, OK, ZIP 74522
Typically, the last spring freeze lands around 03/31, roughly 215 days out. The first fall frost typically arrives around 11/03, about 216 frost-free days later.
Zone 7b (5 to 10°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 Alderson, not a forecast for this year.
What to do before the first frost
Zone 7b around Alderson has about 10 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.
Why 03/31 isn't a guarantee
03/31 is the middle of 30 years of NOAA records, not a promise. Plant by 03/11 and you're betting against frost in roughly 9 years out of 10. 04/18 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Alderson compares
At roughly 216 frost-free days, Alderson places 13,912 of 40,283 ZIP codes in this dataset. Within OK, it ranks 351 of 764.
Learn more
the frost range explains how to read the range around Alderson's dates instead of trusting one, and local microclimates explains what one yard in Alderson can differ from the 74522 normal.