Blackwell, OK 74631 Frost Dates
When can you plant in Blackwell, OK?
The last spring frost here typically falls around 04/10, about 225 days from today. The first fall frost typically arrives around 10/27, about 200 frost-free days later.
Zone 7a (0 to 5°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 Blackwell, not a forecast for this year.
What to do before the first frost
About 9 weeks of growing season left in Blackwell before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
How much risk comes with planting early here
04/10 is the middle of 30 years of NOAA records, not a promise. Plant by 03/25 and you're betting against frost in roughly 9 years out of 10. 04/27 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Blackwell compares
At roughly 200 frost-free days, Blackwell places 17,762 of 40,283 ZIP codes in this dataset. Within OK, it ranks 669 of 764.
Learn more
the frost range covers how to read the range around Blackwell's dates instead of trusting one. local microclimates covers what one yard in Blackwell can differ from the 74631 normal.