Oak Ridge, TN 37830 Frost Dates
Frost dates for Oak Ridge, TN, ZIP 37830
Around 04/05 is the usual last spring frost, about 220 days away. The first fall frost typically arrives around 11/01, about 210 frost-free days later.
The USDA Plant Hardiness Zone Map puts Oak Ridge in Zone 7b (5 to 10°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
Zone 7b around Oak Ridge has about 9 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
Why 04/05 isn't a guarantee
04/05 is the middle of 30 years of NOAA records, not a promise. Plant by 03/19 and you're betting against frost in roughly 9 years out of 10. 04/19 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Oak Ridge compares
About 210 days separate Oak Ridge's last and first frost, putting it 14,971 of 40,283 ZIP codes nationally. Within TN, it ranks 323 of 770.
Learn more
local microclimates explains what one yard in Oak Ridge can differ from the 37830 normal, and zone vs. frost date explains why Zone 7b and Oak Ridge's frost date answer different questions.