Brush, CO 80723 Frost Dates
Frost dates for Brush, CO, ZIP 80723
The last spring frost here typically falls around 05/15, about 260 days from today. The first fall frost typically arrives around 10/01, about 140 frost-free days later.
The USDA Plant Hardiness Zone Map puts Brush in Zone 5b (-15 to -10°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
Zone 5b around Brush has about 5 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.
Why 05/15 isn't a guarantee
05/15 is the middle of 30 years of NOAA records, not a promise. Plant by 05/03 and you're betting against frost in roughly 9 years out of 10. 05/28 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Brush compares
About 140 days separate Brush's last and first frost, putting it 37,047 of 40,283 ZIP codes nationally. Within CO, it ranks 403 of 624.
Learn more
zone vs. frost date explains why Zone 5b and Brush's frost date answer different questions, and the frost range explains how to read the range around Brush's dates instead of trusting one.