Nederland, CO 80474 Frost Dates
Frost dates for Nederland, CO, ZIP 80474
The last spring frost here typically falls around 06/21, about 297 days from today. The first fall frost typically arrives around 09/02, about 71 frost-free days later.
The USDA Plant Hardiness Zone Map puts Nederland in Zone 5b (-15 to -10°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
Zone 5b around Nederland 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.
Why 06/21 isn't a guarantee
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. 07/04 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Nederland compares
About 71 days separate Nederland's last and first frost, putting it 40,114 of 40,283 ZIP codes nationally. Within CO, it ranks 577 of 624.
Learn more
local microclimates explains what one yard in Nederland can differ from the 80474 normal, and zone vs. frost date explains why Zone 5b and Nederland's frost date answer different questions.