Decatur, TN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Decatur, a town in Meigs County, Tennessee.
Overnight
71°F
Partly Cloudy
Partly cloudy, with a low around 71. Wind around 0 mph.
7-day forecast for Decatur
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 71°F | Partly Cloudy | 0 mph | 1% |
| Saturday | 95°F | Sunny then Chance Showers And Thunderstorms | 0 mph | 29% |
| Saturday Night | 69°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 mph | 26% |
| Sunday | 93°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph SW | 25% |
| Sunday Night | 68°F | Chance Showers And Thunderstorms | 0 mph | 32% |
| Monday | 93°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 0 mph | 41% |
| Monday Night | 67°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 0 mph | 65% |
| Tuesday | 87°F | Showers And Thunderstorms | 0 mph | 83% |
| Tuesday Night | 65°F | Showers And Thunderstorms | 0 mph | 83% |
| Wednesday | 81°F | Showers And Thunderstorms Likely | 0 mph | 73% |
| Wednesday Night | 62°F | Showers And Thunderstorms Likely | 0 mph | 73% |
| Thursday | 80°F | Slight Chance Rain Showers | 0 mph | 22% |
| Thursday Night | 60°F | Slight Chance Rain Showers then Partly Cloudy | 0 mph | 22% |
| Friday | 79°F | Mostly Sunny then Slight Chance Rain Showers | 0 to 5 mph N | 18% |
Forecast source: National Weather Service (api.weather.gov) for Decatur (35.529, -84.793). Updated through the day.
Growing snapshot for Decatur
Last spring frost
Apr 4
First fall frost
Oct 31
Growing season
208 days
Hardiness zone
7b
More local growing data for Decatur: nearby ZIP 37322 weather · frost dates · planting calendar · Tennessee frost dates
Climate data from the nearest NOAA station, Dayton 2Se, Tn (9.8 mi from Decatur). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.