Cokedale, CO 81091 Frost Dates
81091, near Cokedale, CO: the frost window
Around 05/11 is the usual last spring frost, about 256 days away. Fall's first freeze usually shows up around 10/04, roughly 145 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Cokedale 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
Cokedale's growing season runs out in roughly 5 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
How much risk comes with planting early here
05/11 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/29 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/25 and only about 1 year in 10 sees frost after that.
Cokedale against the rest of the dataset
Cokedale's growing season runs about 145 days, ranking 36,302 of 40,283 US ZIP codes measured here, longest to shortest. Within CO, it ranks 372 of 624.
Learn more
Two guides worth reading on 81091: local microclimates, on what one yard in Cokedale can differ from the 81091 normal, and zone vs. frost date, on why Zone 6a and Cokedale's frost date answer different questions.