Bennett, CO 80102 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.
Bennett sits in USDA Zone 6a (-10 to -5°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.
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.
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 33,597 of 40,283 ZIP codes nationally. Within CO, it ranks 210 of 624.
Learn more
Before leaning on 80102's figures: local microclimates explains what one yard in Bennett can differ from the 80102 normal, while zone vs. frost date explains why Zone 6a and Bennett's frost date answer different questions.