Amsterdam, MO 64723 Frost Dates
Frost dates for Amsterdam, MO, ZIP 64723
Typically, the last spring freeze lands around 04/12, roughly 227 days out. The first fall frost typically arrives around 10/23, about 192 frost-free days later.
The USDA Plant Hardiness Zone Map puts Amsterdam in Zone 6b (-5 to 0°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
Zone 6b around Amsterdam has about 8 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.
Why 04/12 isn't a guarantee
04/12 is the middle of 30 years of NOAA records, not a promise. Plant by 03/28 and you're betting against frost in roughly 9 years out of 10. 04/28 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Amsterdam compares
At roughly 192 frost-free days, Amsterdam places 20,572 of 40,283 ZIP codes in this dataset. Within MO, it ranks 706 of 1,129.
Learn more
the frost range explains how to read the range around Amsterdam's dates instead of trusting one, and local microclimates explains what one yard in Amsterdam can differ from the 64723 normal.