Deer Trail, CO 80103 Frost Dates
80103, near Deer Trail, CO: the frost window
Typically, the last spring freeze lands around 05/13, roughly 258 days out. Fall's first freeze usually shows up around 10/02, roughly 142 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 Deer Trail, not a forecast for this year.
Stretching the season past the first frost
Deer Trail'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.
Why 05/13 isn't a guarantee
05/13 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/30 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/30 and only about 1 year in 10 sees frost after that.
Deer Trail against the rest of the dataset
At roughly 142 frost-free days, Deer Trail places 36,755 of 40,283 ZIP codes in this dataset. Within CO, it ranks 396 of 624.
Learn more
Two guides worth reading on 80103: the frost range, on how to read the range around Deer Trail's dates instead of trusting one, and local microclimates, on what one yard in Deer Trail can differ from the 80103 normal.