Aurora, CO 80013 Frost Dates
When can you plant in Aurora, CO?
Typically, the last spring freeze lands around 05/07, roughly 252 days out. The first fall frost typically arrives around 10/08, about 152 frost-free days later.
The USDA Plant Hardiness Zone Map puts Aurora in Zone 6a (-10 to -5°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
About 6 weeks of growing season left in Aurora before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Aurora's last frost
05/07 is the middle of 30 years of NOAA records, not a promise. Plant by 04/26 and you're betting against frost in roughly 9 years out of 10. 05/21 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Aurora compares
Aurora's growing season runs about 152 days, ranking 34,666 of 40,283 US ZIP codes measured here, longest to shortest. Within CO, it ranks 284 of 624.
Learn more
zone vs. frost date covers why Zone 6a and Aurora's frost date answer different questions. the frost range covers how to read the range around Aurora's dates instead of trusting one.