Ridgway, CO 81432 Frost Dates
81432, near Ridgway, CO: the frost window
The last spring frost here typically falls around 06/11, about 287 days from today. Fall's first freeze usually shows up around 09/13, roughly 92 days after the last spring frost.
Zone 6a (-10 to -5°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 Ridgway, not a forecast for this year.
Stretching the season past the first frost
Ridgway'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.
Why 06/11 isn't a guarantee
06/11 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/27 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/30 and only about 1 year in 10 sees frost after that.
Ridgway against the rest of the dataset
About 92 days separate Ridgway's last and first frost, putting it 39,887 of 40,283 ZIP codes nationally. Within CO, it ranks 544 of 624.
Learn more
Two guides worth reading on 81432: the frost range, on how to read the range around Ridgway's dates instead of trusting one, and local microclimates, on what one yard in Ridgway can differ from the 81432 normal.