Pueblo, CO 81004 Frost Dates
Frost dates for Pueblo, CO, ZIP 81004
Around 04/26 is the usual last spring frost, about 241 days away. The first fall frost typically arrives around 10/13, about 166 frost-free days later.
The USDA Plant Hardiness Zone Map puts Pueblo in Zone 6a (-10 to -5°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 6a around Pueblo has about 7 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 04/26 isn't a guarantee
04/26 is the middle of 30 years of NOAA records, not a promise. Plant by 04/13 and you're betting against frost in roughly 9 years out of 10. 05/08 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Pueblo compares
Pueblo's growing season runs about 166 days, ranking 30,266 of 40,283 US ZIP codes measured here, longest to shortest. Within CO, it ranks 28 of 624.
Learn more
zone vs. frost date explains why Zone 6a and Pueblo's frost date answer different questions, and the frost range explains how to read the range around Pueblo's dates instead of trusting one.