Dinosaur, CO 81610 Frost Dates
Dinosaur, CO: when does the frost end?
Around 05/10 is the usual last spring frost, about 255 days away. Fall's first freeze usually shows up around 10/04, roughly 147 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Dinosaur 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 5 weeks until Dinosaur's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 05/10 isn't a guarantee
05/10 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/28 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/27 and only about 1 year in 10 sees frost after that.
Dinosaur against the rest of the dataset
Dinosaur's growing season runs about 147 days, ranking 35,982 of 40,283 US ZIP codes measured here, longest to shortest. Within CO, it ranks 359 of 624.
Learn more
Before leaning on 81610's figures: the frost range explains how to read the range around Dinosaur's dates instead of trusting one, while local microclimates explains what one yard in Dinosaur can differ from the 81610 normal.