Alma, KS 66401 Frost Dates
Frost dates for Alma, KS, ZIP 66401
The last spring frost here typically falls around 04/18, about 233 days from today. The first fall frost typically arrives around 10/19, about 183 frost-free days later.
Zone 6b (-5 to 0°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 Alma, not a forecast for this year.
What to do before the first frost
Zone 6b around Alma has about 7 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
The actual range around Alma's last frost
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 Alma compares
About 183 days separate Alma's last and first frost, putting it 23,933 of 40,283 ZIP codes nationally. Within KS, it ranks 443 of 745.
Learn more
local microclimates explains what one yard in Alma can differ from the 66401 normal, and zone vs. frost date explains why Zone 6b and Alma's frost date answer different questions.