Mammoth Spring, AR 72554 Frost Dates
Mammoth Spring, AR: when does the frost end?
Typically, the last spring freeze lands around 04/04, roughly 219 days out. Fall's first freeze usually shows up around 10/31, roughly 210 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Mammoth Spring in Zone 7a (0 to 5°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
With roughly 9 weeks until Mammoth Spring'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
04/04 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/18 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/21 and only about 1 year in 10 sees frost after that.
Mammoth Spring against the rest of the dataset
About 210 days separate Mammoth Spring's last and first frost, putting it 15,048 of 40,283 ZIP codes nationally. Within AR, it ranks 536 of 687.
Learn more
Before leaning on 72554's figures: local microclimates explains what one yard in Mammoth Spring can differ from the 72554 normal, while zone vs. frost date explains why Zone 7a and Mammoth Spring's frost date answer different questions.