Kersey, CO 80633 Frost Dates
Kersey, CO: when does the frost end?
Around 05/12 is the usual last spring frost, about 257 days away. Fall's first freeze usually shows up around 09/28, roughly 135 days after the last spring frost.
Kersey 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 4 weeks until Kersey's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
05/12 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/02 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/25 and only about 1 year in 10 sees frost after that.
Kersey against the rest of the dataset
Kersey's growing season runs about 135 days, ranking 37,877 of 40,283 US ZIP codes measured here, longest to shortest. Within CO, it ranks 426 of 624.
Learn more
Before leaning on 80633's figures: the frost range explains how to read the range around Kersey's dates instead of trusting one, while local microclimates explains what one yard in Kersey can differ from the 80633 normal.