Genoa, CO 80818 Frost Dates
80818, near Genoa, CO: the frost window
Typically, the last spring freeze lands around 05/08, roughly 253 days out. Fall's first freeze usually shows up around 10/10, roughly 155 days after the last spring frost.
Genoa sits in USDA Zone 5b (-15 to -10°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
Stretching the season past the first frost
Genoa'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.
The actual range around Genoa's last frost
05/08 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/25 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/22 and only about 1 year in 10 sees frost after that.
Genoa against the rest of the dataset
At roughly 155 frost-free days, Genoa places 34,167 of 40,283 ZIP codes in this dataset. Within CO, it ranks 255 of 624.
Learn more
Two guides worth reading on 80818: local microclimates, on what one yard in Genoa can differ from the 80818 normal, and zone vs. frost date, on why Zone 5b and Genoa's frost date answer different questions.