Reserve, NM 87821 Frost Dates
87821, near Reserve, NM: the frost window
Around 05/19 is the usual last spring frost, about 264 days away. Fall's first freeze usually shows up around 10/04, roughly 137 days after the last spring frost.
Reserve sits in USDA Zone 6a (-10 to -5°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
Reserve's growing season runs out in roughly 5 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 05/19 isn't a guarantee
05/19 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/05 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/06 and only about 1 year in 10 sees frost after that.
Reserve against the rest of the dataset
Reserve's growing season runs about 137 days, ranking 37,579 of 40,283 US ZIP codes measured here, longest to shortest. Within NM, it ranks 336 of 427.
Learn more
Two guides worth reading on 87821: zone vs. frost date, on why Zone 6a and Reserve's frost date answer different questions, and the frost range, on how to read the range around Reserve's dates instead of trusting one.