Lone Tree, CO 80124 Frost Dates
Frost dates for Lone Tree, CO, ZIP 80124
Typically, the last spring freeze lands around 05/05, roughly 250 days out. The first fall frost typically arrives around 10/08, about 154 frost-free days later.
Lone Tree 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 Lone Tree has about 6 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.
The actual range around Lone Tree's last frost
05/05 is the middle of 30 years of NOAA records, not a promise. Plant by 04/24 and you're betting against frost in roughly 9 years out of 10. 05/17 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Lone Tree compares
About 154 days separate Lone Tree's last and first frost, putting it 34,233 of 40,283 ZIP codes nationally. Within CO, it ranks 264 of 624.
Learn more
the frost range explains how to read the range around Lone Tree's dates instead of trusting one, and local microclimates explains what one yard in Lone Tree can differ from the 80124 normal.