Sugar City, CO 81076 Frost Dates
Frost dates for Sugar City, CO, ZIP 81076
The last spring frost here typically falls around 05/02, about 247 days from today. The first fall frost typically arrives around 10/08, about 159 frost-free days later.
Sugar City sits in USDA Zone 5b (-15 to -10°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
What to do before the first frost
Zone 5b around Sugar City 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.
Why 05/02 isn't a guarantee
05/02 is the middle of 30 years of NOAA records, not a promise. Plant by 04/20 and you're betting against frost in roughly 9 years out of 10. 05/14 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Sugar City compares
About 159 days separate Sugar City's last and first frost, putting it 32,774 of 40,283 ZIP codes nationally. Within CO, it ranks 131 of 624.
Learn more
the frost range explains how to read the range around Sugar City's dates instead of trusting one, and local microclimates explains what one yard in Sugar City can differ from the 81076 normal.