Dayton, TN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Dayton, a city in Rhea County, Tennessee.
This Afternoon
96°F
Scattered Showers And Thunderstorms
Scattered showers and thunderstorms. Sunny, with a high near 96. Heat index values as high as 103. North wind around 5 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Dayton
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 96°F | Scattered Showers And Thunderstorms | 5 mph N | 28% |
| Tonight | 71°F | Scattered Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph N | 27% |
| Saturday | 96°F | Sunny then Chance Showers And Thunderstorms | 0 mph | 33% |
| Saturday Night | 70°F | Chance Showers And Thunderstorms | 0 mph | 35% |
| Sunday | 94°F | Sunny then Chance Showers And Thunderstorms | 0 to 5 mph S | 31% |
| Sunday Night | 69°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 mph | 31% |
| Monday | 93°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 mph | 52% |
| Monday Night | 68°F | Chance Showers And Thunderstorms | 0 mph | 52% |
| Tuesday | 89°F | Showers And Thunderstorms | 0 mph | 77% |
| Tuesday Night | 66°F | Showers And Thunderstorms | 0 mph | 77% |
| Wednesday | 84°F | Showers And Thunderstorms Likely | 0 mph | 57% |
| Wednesday Night | 62°F | Showers And Thunderstorms Likely | 0 mph | 57% |
| Thursday | 82°F | Mostly Sunny then Slight Chance Rain Showers | 0 to 5 mph N | 20% |
| Thursday Night | 60°F | Slight Chance Rain Showers | 0 to 5 mph N | 20% |
Forecast source: National Weather Service (api.weather.gov) for Dayton (35.495, -85.009). Updated through the day.
Growing snapshot for Dayton
Last spring frost
Apr 4
First fall frost
Oct 31
Growing season
208 days
Hardiness zone
7b
More local growing data for Dayton: nearby ZIP 37321 weather · frost dates · planting calendar · Tennessee frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Dayton 2Se, Tn (2.2 mi from Dayton). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.