La Jara, CO 81140 Frost Dates
When can you plant in La Jara, CO?
Around 05/28 is the usual last spring frost, about 273 days away. The first fall frost typically arrives around 09/21, about 115 frost-free days later.
The USDA Plant Hardiness Zone Map puts La Jara in Zone 5b (-15 to -10°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
About 3 weeks of growing season left in La Jara before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 05/28 isn't a guarantee
05/28 is the middle of 30 years of NOAA records, not a promise. Plant by 05/13 and you're betting against frost in roughly 9 years out of 10. 06/11 is the safer bet, historically only a 1-in-10 chance of frost that late.
How La Jara compares
La Jara's growing season runs about 115 days, ranking 39,328 of 40,283 US ZIP codes measured here, longest to shortest. Within CO, it ranks 482 of 624.
Learn more
the frost range covers how to read the range around La Jara's dates instead of trusting one. local microclimates covers what one yard in La Jara can differ from the 81140 normal.