Norwood, CO 81431 Frost Dates
81431, near Norwood, CO: the frost window
The last spring frost here typically falls around 05/25, about 270 days from today. Fall's first freeze usually shows up around 10/01, roughly 128 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Norwood in Zone 6b (-5 to 0°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
Norwood'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.
Why 05/25 isn't a guarantee
05/25 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/07 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/13 and only about 1 year in 10 sees frost after that.
Norwood against the rest of the dataset
Norwood's growing season runs about 128 days, ranking 38,573 of 40,283 US ZIP codes measured here, longest to shortest. Within CO, it ranks 448 of 624.
Learn more
Two guides worth reading on 81431: zone vs. frost date, on why Zone 6b and Norwood's frost date answer different questions, and the frost range, on how to read the range around Norwood's dates instead of trusting one.