Dayton, TN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Dayton, a city in Rhea County, Tennessee.
Today
88°F
Mostly Sunny then Chance Showers And Thunderstorms
A chance of showers and thunderstorms after noon. Mostly sunny, with a high near 88. Heat index values as high as 96. East wind around 0 mph. Chance of precipitation is 40%.
7-day forecast for Dayton
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 88°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 mph | 36% |
| Tonight | 70°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 mph | 36% |
| Wednesday | 87°F | Mostly Sunny then Showers And Thunderstorms Likely | 0 to 5 mph S | 57% |
| Wednesday Night | 70°F | Chance Showers And Thunderstorms | 0 mph | 52% |
| Thursday | 88°F | Showers And Thunderstorms Likely | 0 to 5 mph S | 61% |
| Thursday Night | 71°F | Showers And Thunderstorms Likely then Partly Cloudy | 0 mph | 61% |
| Friday | 89°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph S | 44% |
| Friday Night | 70°F | Chance Showers And Thunderstorms | 0 to 5 mph NW | 44% |
| Saturday | 88°F | Showers And Thunderstorms Likely | 0 mph | 65% |
| Saturday Night | 71°F | Showers And Thunderstorms Likely | 0 mph | 65% |
| Sunday | 89°F | Chance Showers And Thunderstorms | 0 mph | 44% |
| Sunday Night | 72°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 mph | 44% |
| Monday | 90°F | Chance Showers And Thunderstorms | 0 mph | 47% |
| Monday Night | 72°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 mph | 47% |
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 Aug 4, 2026.