Grenville, NM 88424 Frost Dates
Grenville, NM: when does the frost end?
Around 05/05 is the usual last spring frost, about 250 days away. Fall's first freeze usually shows up around 10/09, roughly 156 days after the last spring frost.
Zone 6b (-5 to 0°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 Grenville, not a forecast for this year.
Stretching the season past the first frost
With roughly 6 weeks until Grenville's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
05/05 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/23 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/20 and only about 1 year in 10 sees frost after that.
Grenville against the rest of the dataset
Grenville's growing season runs about 156 days, ranking 33,896 of 40,283 US ZIP codes measured here, longest to shortest. Within NM, it ranks 255 of 427.
Learn more
Before leaning on 88424's figures: local microclimates explains what one yard in Grenville can differ from the 88424 normal, while zone vs. frost date explains why Zone 6b and Grenville's frost date answer different questions.