Hooper, CO 81146 Frost Dates
Hooper, CO: when does the frost end?
Around 05/30 is the usual last spring frost, about 275 days away. Fall's first freeze usually shows up around 09/17, roughly 108 days after the last spring frost.
Hooper sits in USDA Zone 5a (-20 to -15°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 3 weeks until Hooper'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
05/30 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/17 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/13 and only about 1 year in 10 sees frost after that.
Hooper against the rest of the dataset
At roughly 108 frost-free days, Hooper places 39,552 of 40,283 ZIP codes in this dataset. Within CO, it ranks 514 of 624.
Learn more
Before leaning on 81146's figures: zone vs. frost date explains why Zone 5a and Hooper's frost date answer different questions, while the frost range explains how to read the range around Hooper's dates instead of trusting one.