Knobel, AR 72435 Frost Dates
72435, near Knobel, AR: the frost window
Around 03/27 is the usual last spring frost, about 211 days away. Fall's first freeze usually shows up around 11/04, roughly 224 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Knobel in Zone 7b (5 to 10°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
Knobel's growing season runs out in roughly 10 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 03/27 isn't a guarantee
03/27 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/10 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/10 and only about 1 year in 10 sees frost after that.
Knobel against the rest of the dataset
Knobel's growing season runs about 224 days, ranking 11,967 of 40,283 US ZIP codes measured here, longest to shortest. Within AR, it ranks 360 of 687.
Learn more
Two guides worth reading on 72435: zone vs. frost date, on why Zone 7b and Knobel's frost date answer different questions, and the frost range, on how to read the range around Knobel's dates instead of trusting one.