Hooper, CO 81136 Frost Dates
When can you plant in Hooper, CO?
Typically, the last spring freeze lands around 05/26, roughly 271 days out. The first fall frost typically arrives around 09/26, about 120 frost-free days later.
Zone 5a (-20 to -15°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Hooper, not a forecast for this year.
What to do before the first frost
About 4 weeks of growing season left in Hooper before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 05/26 isn't a guarantee
05/26 is the middle of 30 years of NOAA records, not a promise. Plant by 05/14 and you're betting against frost in roughly 9 years out of 10. 06/09 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Hooper compares
At roughly 120 frost-free days, Hooper places 39,120 of 40,283 ZIP codes in this dataset. Within CO, it ranks 466 of 624.
Learn more
zone vs. frost date covers why Zone 5a and Hooper's frost date answer different questions. the frost range covers how to read the range around Hooper's dates instead of trusting one.