Hudson, CO 80643 Frost Dates
Frost dates for Hudson, CO, ZIP 80643
Typically, the last spring freeze lands around 05/05, roughly 250 days out. The first fall frost typically arrives around 10/09, about 156 frost-free days later.
The USDA Plant Hardiness Zone Map puts Hudson in Zone 5b (-15 to -10°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 5b around Hudson has about 6 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 Hudson's last frost
05/05 is the middle of 30 years of NOAA records, not a promise. Plant by 04/23 and you're betting against frost in roughly 9 years out of 10. 05/19 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Hudson compares
About 156 days separate Hudson's last and first frost, putting it 33,680 of 40,283 ZIP codes nationally. Within CO, it ranks 231 of 624.
Learn more
local microclimates explains what one yard in Hudson can differ from the 80643 normal, and zone vs. frost date explains why Zone 5b and Hudson's frost date answer different questions.