Bennett, CO 80150 Frost Dates
Frost dates for Bennett, CO, ZIP 80150
The last spring frost here typically falls around 05/05, about 250 days from today. The first fall frost typically arrives around 10/09, about 156 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 Bennett, not a forecast for this year.
What to do before the first frost
Zone 6a around Bennett 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 05/05 isn't a guarantee
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 Bennett compares
At roughly 156 frost-free days, Bennett places 33,598 of 40,283 ZIP codes in this dataset. Within CO, it ranks 211 of 624.
Learn more
local microclimates explains what one yard in Bennett can differ from the 80150 normal, and zone vs. frost date explains why Zone 6a and Bennett's frost date answer different questions.