Fountain, CO 80930 Frost Dates
When can you plant in Fountain, CO?
Typically, the last spring freeze lands around 05/03, roughly 248 days out. The first fall frost typically arrives around 10/08, about 158 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 Fountain, not a forecast for this year.
What to do before the first frost
About 6 weeks of growing season left in Fountain before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Fountain's last frost
05/03 is the middle of 30 years of NOAA records, not a promise. Plant by 04/22 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 Fountain compares
At roughly 158 frost-free days, Fountain places 32,907 of 40,283 ZIP codes in this dataset. Within CO, it ranks 167 of 624.
Learn more
local microclimates covers what one yard in Fountain can differ from the 80930 normal. zone vs. frost date covers why Zone 6a and Fountain's frost date answer different questions.