Oak Grove, TN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Oak Grove, a community in Washington County, Tennessee.
This Afternoon
91°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Mostly sunny, with a high near 91. North wind around 0 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Oak Grove
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 91°F | Chance Showers And Thunderstorms | 0 mph | 31% |
| Tonight | 66°F | Chance Showers And Thunderstorms | 0 mph | 33% |
| Sunday | 89°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph SW | 39% |
| Sunday Night | 65°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph S | 35% |
| Monday | 88°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph SW | 46% |
| Monday Night | 65°F | Chance Showers And Thunderstorms | 0 to 5 mph E | 50% |
| Tuesday | 83°F | Showers And Thunderstorms | 0 mph | 84% |
| Tuesday Night | 62°F | Showers And Thunderstorms | 0 to 5 mph E | 84% |
| Wednesday | 78°F | Rain Showers Likely | 5 mph SE | 73% |
| Wednesday Night | 59°F | Showers And Thunderstorms Likely | 5 to 10 mph E | 73% |
| Thursday | 75°F | Rain Showers Likely | 0 to 5 mph NE | 55% |
| Thursday Night | 56°F | Chance Rain Showers | 0 to 5 mph NE | 40% |
| Friday | 75°F | Mostly Sunny then Chance Rain Showers | 0 to 5 mph N | 28% |
| Friday Night | 52°F | Chance Rain Showers then Partly Cloudy | 0 to 5 mph N | 28% |
Forecast source: National Weather Service (api.weather.gov) for Oak Grove (36.425, -82.434). Updated through the day.
Growing snapshot for Oak Grove
Last spring frost
Apr 16
First fall frost
Oct 24
Growing season
190 days
Hardiness zone
7b
More local growing data for Oak Grove: nearby ZIP 37615 weather · frost dates · planting calendar · Tennessee frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Bristol Tri City Ap, Tn (5.8 mi from Oak Grove). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.