La Salle, CO 80645 Frost Dates
Frost dates for La Salle, CO, ZIP 80645
Around 05/02 is the usual last spring frost, about 247 days away. The first fall frost typically arrives around 10/08, about 159 frost-free days later.
The USDA Plant Hardiness Zone Map puts La Salle in Zone 5a (-20 to -15°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
Zone 5a around La Salle has about 6 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
How much risk comes with planting early here
05/02 is the middle of 30 years of NOAA records, not a promise. Plant by 04/17 and you're betting against frost in roughly 9 years out of 10. 05/14 is the safer bet, historically only a 1-in-10 chance of frost that late.
How La Salle compares
At roughly 159 frost-free days, La Salle places 32,668 of 40,283 ZIP codes in this dataset. Within CO, it ranks 117 of 624.
Learn more
the frost range explains how to read the range around La Salle's dates instead of trusting one, and local microclimates explains what one yard in La Salle can differ from the 80645 normal.