Steamboat Springs, CO 80488 Frost Dates
Steamboat Springs, CO: when does the frost end?
Around 06/09 is the usual last spring frost, about 285 days away. Fall's first freeze usually shows up around 09/12, roughly 93 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Steamboat Springs in Zone 4b (-25 to -20°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
With roughly 2 weeks until Steamboat Springs's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Steamboat Springs's last frost
06/09 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/25 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/24 and only about 1 year in 10 sees frost after that.
Steamboat Springs against the rest of the dataset
About 93 days separate Steamboat Springs's last and first frost, putting it 39,867 of 40,283 ZIP codes nationally. Within CO, it ranks 540 of 624.
Learn more
Before leaning on 80488's figures: zone vs. frost date explains why Zone 4b and Steamboat Springs's frost date answer different questions, while the frost range explains how to read the range around Steamboat Springs's dates instead of trusting one.