Hamilton, MO 64644 Frost Dates
Frost dates for Hamilton, MO, ZIP 64644
The last spring frost here typically falls around 04/23, about 238 days from today. The first fall frost typically arrives around 10/17, about 175 frost-free days later.
Zone 6a (-10 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 Hamilton, not a forecast for this year.
What to do before the first frost
Zone 6a around Hamilton 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 Hamilton's last frost
04/23 is the middle of 30 years of NOAA records, not a promise. Plant by 04/09 and you're betting against frost in roughly 9 years out of 10. 05/06 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Hamilton compares
About 175 days separate Hamilton's last and first frost, putting it 27,010 of 40,283 ZIP codes nationally. Within MO, it ranks 1,075 of 1,129.
Learn more
local microclimates explains what one yard in Hamilton can differ from the 64644 normal, and zone vs. frost date explains why Zone 6a and Hamilton's frost date answer different questions.