St. George, KS 66535 Frost Dates
When can you plant in St. George, KS?
Around 04/18 is the usual last spring frost, about 233 days away. The first fall frost typically arrives around 10/19, about 183 frost-free days later.
Zone 6a (-10 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 St. George, not a forecast for this year.
What to do before the first frost
About 7 weeks of growing season left in St. George before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 04/18 isn't a guarantee
04/18 is the middle of 30 years of NOAA records, not a promise. Plant by 04/04 and you're betting against frost in roughly 9 years out of 10. 05/02 is the safer bet, historically only a 1-in-10 chance of frost that late.
How St. George compares
At roughly 183 frost-free days, St. George places 23,915 of 40,283 ZIP codes in this dataset. Within KS, it ranks 441 of 745.
Learn more
zone vs. frost date covers why Zone 6a and St. George's frost date answer different questions. the frost range covers how to read the range around St. George's dates instead of trusting one.