Glendale, CO 80281 Frost Dates
80281, near Glendale, CO: the frost window
The last spring frost here typically falls around 04/30, about 245 days from today. Fall's first freeze usually shows up around 10/12, roughly 165 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Glendale 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
Glendale'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 Glendale's last frost
04/30 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/15 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/13 and only about 1 year in 10 sees frost after that.
Glendale against the rest of the dataset
About 165 days separate Glendale's last and first frost, putting it 30,562 of 40,283 ZIP codes nationally. Within CO, it ranks 57 of 624.
Learn more
Two guides worth reading on 80281: local microclimates, on what one yard in Glendale can differ from the 80281 normal, and zone vs. frost date, on why Zone 6a and Glendale's frost date answer different questions.