Bennett, CO 80250 Frost Dates
80250, near Bennett, CO: the frost window
Typically, the last spring freeze lands around 05/05, roughly 250 days out. Fall's first freeze usually shows up around 10/09, roughly 156 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Bennett in Zone 6a (-10 to -5°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
Bennett's growing season runs out in roughly 6 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 05/05 isn't a guarantee
05/05 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/23 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/19 and only about 1 year in 10 sees frost after that.
Bennett against the rest of the dataset
About 156 days separate Bennett's last and first frost, putting it 33,611 of 40,283 ZIP codes nationally. Within CO, it ranks 224 of 624.
Learn more
Two guides worth reading on 80250: the frost range, on how to read the range around Bennett's dates instead of trusting one, and local microclimates, on what one yard in Bennett can differ from the 80250 normal.