Cottage Grove, TN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Cottage Grove, a town in Henry County, Tennessee.
Today
99°F
Sunny
Sunny, with a high near 99. Heat index values as high as 102. West wind around 5 mph.
7-day forecast for Cottage Grove
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 99°F | Sunny | 5 mph W | 2% |
| Tonight | 71°F | Mostly Clear | 0 mph | 1% |
| Sunday | 98°F | Mostly Sunny | 0 to 10 mph WSW | 1% |
| Sunday Night | 71°F | Partly Cloudy | 0 to 5 mph S | 3% |
| Monday | 94°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 to 10 mph NNE | 29% |
| Monday Night | 66°F | Chance Showers And Thunderstorms | 5 to 10 mph NNE | 40% |
| Tuesday | 83°F | Chance Showers And Thunderstorms | 5 to 10 mph N | 37% |
| Tuesday Night | 61°F | Partly Cloudy | 5 to 15 mph N | 14% |
| Wednesday | 81°F | Mostly Sunny | 5 to 10 mph N | 10% |
| Wednesday Night | 59°F | Partly Cloudy | 5 to 10 mph NNE | 5% |
| Thursday | 80°F | Mostly Sunny | 5 to 10 mph NNE | 3% |
| Thursday Night | 59°F | Partly Cloudy | 5 to 10 mph NNE | 3% |
| Friday | 80°F | Mostly Sunny | 5 to 10 mph NNE | 5% |
| Friday Night | 58°F | Partly Cloudy | 5 to 10 mph NNE | 5% |
Forecast source: National Weather Service (api.weather.gov) for Cottage Grove (36.378, -88.479). Updated through the day.
Growing snapshot for Cottage Grove
Last spring frost
Apr 7
First fall frost
Oct 31
Growing season
206 days
Hardiness zone
7b
More local growing data for Cottage Grove: nearby ZIP 38224 weather · frost dates · planting calendar · Tennessee frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Paris 2 Se, Tn (12.9 mi from Cottage Grove). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.