South Haven, KS 67140 Frost Dates
Frost dates for South Haven, KS, ZIP 67140
Typically, the last spring freeze lands around 04/15, roughly 230 days out. The first fall frost typically arrives around 10/29, about 195 frost-free days later.
Zone 7a (0 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 South Haven, not a forecast for this year.
What to do before the first frost
Zone 7a around South Haven has about 9 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 South Haven's last frost
04/15 is the middle of 30 years of NOAA records, not a promise. Plant by 03/29 and you're betting against frost in roughly 9 years out of 10. 04/30 is the safer bet, historically only a 1-in-10 chance of frost that late.
How South Haven compares
South Haven's growing season runs about 195 days, ranking 19,345 of 40,283 US ZIP codes measured here, longest to shortest. Within KS, it ranks 215 of 745.
Learn more
local microclimates explains what one yard in South Haven can differ from the 67140 normal, and zone vs. frost date explains why Zone 7a and South Haven's frost date answer different questions.