Ignacio, CO 87419 Frost Dates
87419, near Ignacio, CO: the frost window
Around 05/23 is the usual last spring frost, about 268 days away. Fall's first freeze usually shows up around 09/29, roughly 128 days after the last spring frost.
Zone 6b (-5 to 0°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 Ignacio, not a forecast for this year.
Stretching the season past the first frost
Ignacio's growing season runs out in roughly 5 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
The actual range around Ignacio's last frost
05/23 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/09 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/07 and only about 1 year in 10 sees frost after that.
Ignacio against the rest of the dataset
Ignacio's growing season runs about 128 days, ranking 38,556 of 40,283 US ZIP codes measured here, longest to shortest. Within CO, it ranks 446 of 624.
Learn more
Two guides worth reading on 87419: local microclimates, on what one yard in Ignacio can differ from the 87419 normal, and zone vs. frost date, on why Zone 6b and Ignacio's frost date answer different questions.