Haddam, KS 66944 Frost Dates
When can you plant in Haddam, KS?
Typically, the last spring freeze lands around 04/24, roughly 239 days out. The first fall frost typically arrives around 10/14, about 171 frost-free days later.
Haddam sits in USDA Zone 6a (-10 to -5°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
What to do before the first frost
About 7 weeks of growing season left in Haddam before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 04/24 isn't a guarantee
04/24 is the middle of 30 years of NOAA records, not a promise. Plant by 04/10 and you're betting against frost in roughly 9 years out of 10. 05/08 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Haddam compares
Haddam's growing season runs about 171 days, ranking 28,851 of 40,283 US ZIP codes measured here, longest to shortest. Within KS, it ranks 664 of 745.
Learn more
zone vs. frost date covers why Zone 6a and Haddam's frost date answer different questions. the frost range covers how to read the range around Haddam's dates instead of trusting one.