Hanna, OK 74845 Frost Dates
When can you plant in Hanna, OK?
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.
Hanna sits in USDA Zone 7b (5 to 10°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
About 10 weeks of growing season left in Hanna before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Hanna's last frost
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 Hanna compares
About 216 days separate Hanna's last and first frost, putting it 13,939 of 40,283 ZIP codes nationally. Within OK, it ranks 361 of 764.
Learn more
zone vs. frost date covers why Zone 7b and Hanna's frost date answer different questions. the frost range covers how to read the range around Hanna's dates instead of trusting one.