Monte Vista, CO 81144 Frost Dates
81144, near Monte Vista, CO: the frost window
Around 06/11 is the usual last spring frost, about 287 days away. Fall's first freeze usually shows up around 09/13, roughly 92 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Monte Vista in Zone 5a (-20 to -15°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
Monte Vista's growing season runs out in roughly 2 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
How much risk comes with planting early here
06/11 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 06/01 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/25 and only about 1 year in 10 sees frost after that.
Monte Vista against the rest of the dataset
About 92 days separate Monte Vista's last and first frost, putting it 39,883 of 40,283 ZIP codes nationally. Within CO, it ranks 542 of 624.
Learn more
Two guides worth reading on 81144: zone vs. frost date, on why Zone 5a and Monte Vista's frost date answer different questions, and the frost range, on how to read the range around Monte Vista's dates instead of trusting one.