Pueblo, CO 81009 Frost Dates
81009, near Pueblo, CO: the frost window
Around 04/30 is the usual last spring frost, about 245 days away. Fall's first freeze usually shows up around 10/09, roughly 161 days after the last spring frost.
Zone 5b (-15 to -10°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Pueblo, not a forecast for this year.
Stretching the season past the first frost
Pueblo's growing season runs out in roughly 6 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 04/30 isn't a guarantee
04/30 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/18 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/12 and only about 1 year in 10 sees frost after that.
Pueblo against the rest of the dataset
About 161 days separate Pueblo's last and first frost, putting it 31,930 of 40,283 ZIP codes nationally. Within CO, it ranks 78 of 624.
Learn more
Two guides worth reading on 81009: the frost range, on how to read the range around Pueblo's dates instead of trusting one, and local microclimates, on what one yard in Pueblo can differ from the 81009 normal.