Fleming, CO 80728 Frost Dates
80728, near Fleming, CO: the frost window
Typically, the last spring freeze lands around 05/04, roughly 249 days out. Fall's first freeze usually shows up around 10/11, roughly 157 days after the last spring frost.
Fleming 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
Fleming'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 Fleming's last frost
05/04 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/21 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/16 and only about 1 year in 10 sees frost after that.
Fleming against the rest of the dataset
Fleming's growing season runs about 157 days, ranking 33,431 of 40,283 US ZIP codes measured here, longest to shortest. Within CO, it ranks 181 of 624.
Learn more
Two guides worth reading on 80728: the frost range, on how to read the range around Fleming's dates instead of trusting one, and local microclimates, on what one yard in Fleming can differ from the 80728 normal.