Riverside, AL 35135 Frost Dates
35135, near Riverside, AL: the frost window
Around 03/26 is the usual last spring frost, about 210 days away. Fall's first freeze usually shows up around 11/04, roughly 225 days after the last spring frost.
Zone 8a (10 to 15°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 Riverside, not a forecast for this year.
Stretching the season past the first frost
Riverside'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 03/26 isn't a guarantee
03/26 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/02 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/14 and only about 1 year in 10 sees frost after that.
Riverside against the rest of the dataset
At roughly 225 frost-free days, Riverside places 11,431 of 40,283 ZIP codes in this dataset. Within AL, it ranks 592 of 809.
Learn more
Two guides worth reading on 35135: local microclimates, on what one yard in Riverside can differ from the 35135 normal, and zone vs. frost date, on why Zone 8a and Riverside's frost date answer different questions.