Bennett, CO 80155 Frost Dates
Bennett, CO: when does the frost end?
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
With roughly 6 weeks until Bennett's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
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
Bennett's growing season runs about 156 days, ranking 33,600 of 40,283 US ZIP codes measured here, longest to shortest. Within CO, it ranks 213 of 624.
Learn more
Before leaning on 80155's figures: zone vs. frost date explains why Zone 6a and Bennett's frost date answer different questions, while the frost range explains how to read the range around Bennett's dates instead of trusting one.