Holyoke, CO 80734 Frost Dates
Holyoke, CO: when does the frost end?
The last spring frost here typically falls around 05/11, about 256 days from today. Fall's first freeze usually shows up around 10/03, roughly 144 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Holyoke in Zone 5b (-15 to -10°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
With roughly 5 weeks until Holyoke'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
05/11 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 05/23 and only about 1 year in 10 sees frost after that.
Holyoke against the rest of the dataset
Holyoke's growing season runs about 144 days, ranking 36,372 of 40,283 US ZIP codes measured here, longest to shortest. Within CO, it ranks 374 of 624.
Learn more
Before leaning on 80734's figures: zone vs. frost date explains why Zone 5b and Holyoke's frost date answer different questions, while the frost range explains how to read the range around Holyoke's dates instead of trusting one.