Sterling, CO 80751 Frost Dates
Sterling, CO: when does the frost end?
Around 05/10 is the usual last spring frost, about 255 days away. Fall's first freeze usually shows up around 10/06, roughly 147 days after the last spring frost.
Sterling 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
With roughly 6 weeks until Sterling's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Sterling's last frost
05/10 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/28 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.
Sterling against the rest of the dataset
At roughly 147 frost-free days, Sterling places 35,862 of 40,283 ZIP codes in this dataset. Within CO, it ranks 344 of 624.
Learn more
Before leaning on 80751's figures: the frost range explains how to read the range around Sterling's dates instead of trusting one, while local microclimates explains what one yard in Sterling can differ from the 80751 normal.