Dinosaur, CO 81640 Frost Dates
Frost dates for Dinosaur, CO, ZIP 81640
The last spring frost here typically falls around 06/16, about 292 days from today. The first fall frost typically arrives around 09/09, about 83 frost-free days later.
Dinosaur 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.
What to do before the first frost
Zone 6a around Dinosaur has about 2 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
How much risk comes with planting early here
06/16 is the middle of 30 years of NOAA records, not a promise. Plant by 05/31 and you're betting against frost in roughly 9 years out of 10. 07/01 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Dinosaur compares
About 83 days separate Dinosaur's last and first frost, putting it 40,030 of 40,283 ZIP codes nationally. Within CO, it ranks 565 of 624.
Learn more
zone vs. frost date explains why Zone 6a and Dinosaur's frost date answer different questions, and the frost range explains how to read the range around Dinosaur's dates instead of trusting one.