Monument, CO 80840 Frost Dates
Monument, CO: when does the frost end?
The last spring frost here typically falls around 05/14, about 259 days from today. Fall's first freeze usually shows up around 10/01, roughly 138 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Monument in Zone 5b (-15 to -10°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 5 weeks until Monument's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Monument's last frost
05/14 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/02 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/31 and only about 1 year in 10 sees frost after that.
Monument against the rest of the dataset
About 138 days separate Monument's last and first frost, putting it 37,361 of 40,283 ZIP codes nationally. Within CO, it ranks 408 of 624.
Learn more
Before leaning on 80840's figures: the frost range explains how to read the range around Monument's dates instead of trusting one, while local microclimates explains what one yard in Monument can differ from the 80840 normal.