Steamboat Springs, CO 80430 Frost Dates
Frost dates for Steamboat Springs, CO, ZIP 80430
The last spring frost here typically falls around 06/09, about 285 days from today. The first fall frost typically arrives around 09/12, about 93 frost-free days later.
Steamboat Springs sits in USDA Zone 4b (-25 to -20°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
What to do before the first frost
Zone 4b around Steamboat Springs has about 2 weeks 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 06/09 isn't a guarantee
06/09 is the middle of 30 years of NOAA records, not a promise. Plant by 05/25 and you're betting against frost in roughly 9 years out of 10. 06/24 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Steamboat Springs compares
About 93 days separate Steamboat Springs's last and first frost, putting it 39,865 of 40,283 ZIP codes nationally. Within CO, it ranks 538 of 624.
Learn more
the frost range explains how to read the range around Steamboat Springs's dates instead of trusting one, and local microclimates explains what one yard in Steamboat Springs can differ from the 80430 normal.