Bow Mar, CO 80123 Frost Dates
Bow Mar, CO: when does the frost end?
Typically, the last spring freeze lands around 05/02, roughly 247 days out. Fall's first freeze usually shows up around 10/11, roughly 160 days after the last spring frost.
Bow Mar 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 6 weeks until Bow Mar's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Bow Mar's last frost
05/02 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/20 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/17 and only about 1 year in 10 sees frost after that.
Bow Mar against the rest of the dataset
About 160 days separate Bow Mar's last and first frost, putting it 32,451 of 40,283 ZIP codes nationally. Within CO, it ranks 104 of 624.
Learn more
Before leaning on 80123's figures: local microclimates explains what one yard in Bow Mar can differ from the 80123 normal, while zone vs. frost date explains why Zone 6a and Bow Mar's frost date answer different questions.