San Jon, NM 88411 Frost Dates
88411, near San Jon, NM: the frost window
Around 04/18 is the usual last spring frost, about 233 days away. Fall's first freeze usually shows up around 10/26, roughly 190 days after the last spring frost.
Zone 7a (0 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 San Jon, not a forecast for this year.
Stretching the season past the first frost
San Jon's growing season runs out in roughly 8 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
04/18 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/02 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/01 and only about 1 year in 10 sees frost after that.
San Jon against the rest of the dataset
San Jon's growing season runs about 190 days, ranking 21,322 of 40,283 US ZIP codes measured here, longest to shortest. Within NM, it ranks 152 of 427.
Learn more
Two guides worth reading on 88411: local microclimates, on what one yard in San Jon can differ from the 88411 normal, and zone vs. frost date, on why Zone 7a and San Jon's frost date answer different questions.