Coal Creek, CO 81221 Frost Dates
When can you plant in Coal Creek, CO?
The last spring frost here typically falls around 05/04, about 249 days from today. The first fall frost typically arrives around 10/07, about 153 frost-free days later.
Zone 6a (-10 to -5°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 Coal Creek, not a forecast for this year.
What to do before the first frost
About 6 weeks of growing season left in Coal Creek before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Coal Creek's last frost
05/04 is the middle of 30 years of NOAA records, not a promise. Plant by 04/24 and you're betting against frost in roughly 9 years out of 10. 05/18 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Coal Creek compares
Coal Creek's growing season runs about 153 days, ranking 34,613 of 40,283 US ZIP codes measured here, longest to shortest. Within CO, it ranks 281 of 624.
Learn more
zone vs. frost date covers why Zone 6a and Coal Creek's frost date answer different questions. the frost range covers how to read the range around Coal Creek's dates instead of trusting one.