Montrose, CO 81403 Frost Dates
Montrose, CO: when does the frost end?
Around 04/28 is the usual last spring frost, about 243 days away. Fall's first freeze usually shows up around 10/14, roughly 167 days after the last spring frost.
Montrose sits in USDA Zone 6a (-10 to -5°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.
Stretching the season past the first frost
With roughly 7 weeks until Montrose's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Montrose's last frost
04/28 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/13 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/12 and only about 1 year in 10 sees frost after that.
Montrose against the rest of the dataset
About 167 days separate Montrose's last and first frost, putting it 29,888 of 40,283 ZIP codes nationally. Within CO, it ranks 25 of 624.
Learn more
Before leaning on 81403's figures: zone vs. frost date explains why Zone 6a and Montrose's frost date answer different questions, while the frost range explains how to read the range around Montrose's dates instead of trusting one.