Grand Junction, CO 81507 Frost Dates
When can you plant in Grand Junction, CO?
The last spring frost here typically falls around 04/26, about 241 days from today. The first fall frost typically arrives around 10/16, about 172 frost-free days later.
Zone 7a (0 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 Grand Junction, not a forecast for this year.
What to do before the first frost
About 7 weeks of growing season left in Grand Junction before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
How much risk comes with planting early here
04/26 is the middle of 30 years of NOAA records, not a promise. Plant by 04/09 and you're betting against frost in roughly 9 years out of 10. 05/15 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Grand Junction compares
Grand Junction's growing season runs about 172 days, ranking 28,139 of 40,283 US ZIP codes measured here, longest to shortest. Within CO, it ranks 11 of 624.
Learn more
zone vs. frost date covers why Zone 7a and Grand Junction's frost date answer different questions. the frost range covers how to read the range around Grand Junction's dates instead of trusting one.