Hugo, CO 80821 Frost Dates
Frost dates for Hugo, CO, ZIP 80821
Typically, the last spring freeze lands around 05/10, roughly 255 days out. The first fall frost typically arrives around 10/02, about 143 frost-free days later.
The USDA Plant Hardiness Zone Map puts Hugo 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 Hugo has about 5 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
05/10 is the middle of 30 years of NOAA records, not a promise. Plant by 04/30 and you're betting against frost in roughly 9 years out of 10. 05/25 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Hugo compares
About 143 days separate Hugo's last and first frost, putting it 36,574 of 40,283 ZIP codes nationally. Within CO, it ranks 383 of 624.
Learn more
zone vs. frost date explains why Zone 5b and Hugo's frost date answer different questions, and the frost range explains how to read the range around Hugo's dates instead of trusting one.