Pitkin, CO 81237 Frost Dates
Frost dates for Pitkin, CO, ZIP 81237
Around 06/21 is the usual last spring frost, about 297 days away. The first fall frost typically arrives around 09/05, about 74 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 Pitkin, not a forecast for this year.
What to do before the first frost
Zone 5a around Pitkin has about 1 week left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
The actual range around Pitkin's last frost
06/21 is the middle of 30 years of NOAA records, not a promise. Plant by 06/07 and you're betting against frost in roughly 9 years out of 10. 07/07 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Pitkin compares
Pitkin's growing season runs about 74 days, ranking 40,100 of 40,283 US ZIP codes measured here, longest to shortest. Within CO, it ranks 575 of 624.
Learn more
the frost range explains how to read the range around Pitkin's dates instead of trusting one, and local microclimates explains what one yard in Pitkin can differ from the 81237 normal.