Cyril, OK 73029 Frost Dates
When can you plant in Cyril, OK?
Around 03/21 is the usual last spring frost, about 205 days away. The first fall frost typically arrives around 11/12, about 234 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 Cyril, not a forecast for this year.
What to do before the first frost
About 11 weeks of growing season left in Cyril 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
03/21 is the middle of 30 years of NOAA records, not a promise. Plant by 02/28 and you're betting against frost in roughly 9 years out of 10. 04/08 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Cyril compares
Cyril's growing season runs about 234 days, ranking 9,785 of 40,283 US ZIP codes measured here, longest to shortest. Within OK, it ranks 23 of 764.
Learn more
the frost range covers how to read the range around Cyril's dates instead of trusting one. local microclimates covers what one yard in Cyril can differ from the 73029 normal.