Federal Heights, CO 80229 Frost Dates
80229, near Federal Heights, CO: the frost window
Around 05/02 is the usual last spring frost, about 247 days away. Fall's first freeze usually shows up around 10/11, roughly 160 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Federal Heights 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
Federal Heights'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.
The actual range around Federal Heights's last frost
05/02 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/18 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/14 and only about 1 year in 10 sees frost after that.
Federal Heights against the rest of the dataset
Federal Heights's growing season runs about 160 days, ranking 32,257 of 40,283 US ZIP codes measured here, longest to shortest. Within CO, it ranks 98 of 624.
Learn more
Two guides worth reading on 80229: zone vs. frost date, on why Zone 6a and Federal Heights's frost date answer different questions, and the frost range, on how to read the range around Federal Heights's dates instead of trusting one.