Columbia, TN 38402 Frost Dates
Columbia, TN: when does the frost end?
Typically, the last spring freeze lands around 04/10, roughly 225 days out. Fall's first freeze usually shows up around 10/27, roughly 199 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Columbia 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
With roughly 9 weeks until Columbia'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
04/10 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/26 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/26 and only about 1 year in 10 sees frost after that.
Columbia against the rest of the dataset
Columbia's growing season runs about 199 days, ranking 18,018 of 40,283 US ZIP codes measured here, longest to shortest. Within TN, it ranks 553 of 770.
Learn more
Before leaning on 38402's figures: zone vs. frost date explains why Zone 7b and Columbia's frost date answer different questions, while the frost range explains how to read the range around Columbia's dates instead of trusting one.