Sumner, MS 38957 Frost Dates
When can you plant in Sumner, MS?
Around 03/17 is the usual last spring frost, about 201 days away. The first fall frost typically arrives around 11/07, about 233 frost-free days later.
Sumner sits in USDA Zone 8b (15 to 20°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
What to do before the first frost
About 10 weeks of growing season left in Sumner before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Sumner's last frost
03/17 is the middle of 30 years of NOAA records, not a promise. Plant by 02/28 and you're betting against frost in roughly 9 years out of 10. 04/05 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Sumner compares
About 233 days separate Sumner's last and first frost, putting it 9,982 of 40,283 ZIP codes nationally. Within MS, it ranks 359 of 523.
Learn more
local microclimates covers what one yard in Sumner can differ from the 38957 normal. zone vs. frost date covers why Zone 8b and Sumner's frost date answer different questions.