Bennett, CO 80136 Frost Dates
Frost dates for Bennett, CO, ZIP 80136
Typically, the last spring freeze lands around 05/13, roughly 258 days out. The first fall frost typically arrives around 10/02, about 142 frost-free days later.
Bennett 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 Bennett 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.
Why 05/13 isn't a guarantee
05/13 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. 05/30 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Bennett compares
About 142 days separate Bennett's last and first frost, putting it 36,733 of 40,283 ZIP codes nationally. Within CO, it ranks 395 of 624.
Learn more
zone vs. frost date explains why Zone 5b and Bennett's frost date answer different questions, and the frost range explains how to read the range around Bennett's dates instead of trusting one.