Cromwell, OK 74837 Frost Dates
When can you plant in Cromwell, OK?
The last spring frost here typically falls around 03/24, about 208 days from today. The first fall frost typically arrives around 11/09, about 229 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 Cromwell, not a forecast for this year.
What to do before the first frost
About 10 weeks of growing season left in Cromwell before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Cromwell's last frost
03/24 is the middle of 30 years of NOAA records, not a promise. Plant by 03/05 and you're betting against frost in roughly 9 years out of 10. 04/10 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Cromwell compares
Cromwell's growing season runs about 229 days, ranking 10,666 of 40,283 US ZIP codes measured here, longest to shortest. Within OK, it ranks 48 of 764.
Learn more
local microclimates covers what one yard in Cromwell can differ from the 74837 normal. zone vs. frost date covers why Zone 7b and Cromwell's frost date answer different questions.