San Jon, NM 88434 Frost Dates
Frost dates for San Jon, NM, ZIP 88434
Typically, the last spring freeze lands around 04/18, roughly 233 days out. The first fall frost typically arrives around 10/26, about 190 frost-free days later.
The USDA Plant Hardiness Zone Map puts San Jon in Zone 7a (0 to 5°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 7a around San Jon has about 8 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.
The actual range around San Jon's last frost
04/18 is the middle of 30 years of NOAA records, not a promise. Plant by 04/02 and you're betting against frost in roughly 9 years out of 10. 05/01 is the safer bet, historically only a 1-in-10 chance of frost that late.
How San Jon compares
San Jon's growing season runs about 190 days, ranking 21,323 of 40,283 US ZIP codes measured here, longest to shortest. Within NM, it ranks 153 of 427.
Learn more
the frost range explains how to read the range around San Jon's dates instead of trusting one, and local microclimates explains what one yard in San Jon can differ from the 88434 normal.