Amsterdam, OH 43903 Frost Dates
Frost dates for Amsterdam, OH, ZIP 43903
The last spring frost here typically falls around 04/22, about 237 days from today. The first fall frost typically arrives around 10/28, about 186 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 Amsterdam, not a forecast for this year.
What to do before the first frost
Zone 6b around Amsterdam 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.
How much risk comes with planting early here
04/22 is the middle of 30 years of NOAA records, not a promise. Plant by 04/11 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 Amsterdam compares
Amsterdam's growing season runs about 186 days, ranking 22,918 of 40,283 US ZIP codes measured here, longest to shortest. Within OH, it ranks 513 of 1,383.
Learn more
local microclimates explains what one yard in Amsterdam can differ from the 43903 normal, and zone vs. frost date explains why Zone 6b and Amsterdam's frost date answer different questions.