Parker, CO 80134 Frost Dates
80134, near Parker, CO: the frost window
The last spring frost here typically falls around 05/09, about 254 days from today. Fall's first freeze usually shows up around 10/03, roughly 145 days after the last spring frost.
Zone 5b (-15 to -10°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Parker, not a forecast for this year.
Stretching the season past the first frost
Parker's growing season runs out in roughly 5 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
05/09 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/27 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/23 and only about 1 year in 10 sees frost after that.
Parker against the rest of the dataset
About 145 days separate Parker's last and first frost, putting it 36,157 of 40,283 ZIP codes nationally. Within CO, it ranks 368 of 624.
Learn more
Two guides worth reading on 80134: zone vs. frost date, on why Zone 5b and Parker's frost date answer different questions, and the frost range, on how to read the range around Parker's dates instead of trusting one.