Union City, OK 73090 Frost Dates
When can you plant in Union City, OK?
Around 04/06 is the usual last spring frost, about 221 days away. The first fall frost typically arrives around 10/31, about 206 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 Union City, not a forecast for this year.
What to do before the first frost
About 9 weeks of growing season left in Union City before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 04/06 isn't a guarantee
04/06 is the middle of 30 years of NOAA records, not a promise. Plant by 03/21 and you're betting against frost in roughly 9 years out of 10. 04/22 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Union City compares
About 206 days separate Union City's last and first frost, putting it 16,031 of 40,283 ZIP codes nationally. Within OK, it ranks 552 of 764.
Learn more
local microclimates covers what one yard in Union City can differ from the 73090 normal. zone vs. frost date covers why Zone 7b and Union City's frost date answer different questions.