Walsh, CO 81090 Frost Dates
81090, near Walsh, CO: the frost window
The last spring frost here typically falls around 04/30, about 245 days from today. Fall's first freeze usually shows up around 10/14, roughly 166 days after the last spring frost.
Walsh sits in USDA Zone 6b (-5 to 0°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
Walsh's growing season runs out in roughly 7 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
04/30 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/17 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/12 and only about 1 year in 10 sees frost after that.
Walsh against the rest of the dataset
About 166 days separate Walsh's last and first frost, putting it 30,431 of 40,283 ZIP codes nationally. Within CO, it ranks 32 of 624.
Learn more
Two guides worth reading on 81090: the frost range, on how to read the range around Walsh's dates instead of trusting one, and local microclimates, on what one yard in Walsh can differ from the 81090 normal.