Wynnburg, TN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Wynnburg, a community in Lake County, Tennessee.
This Afternoon
99°F
Sunny
Sunny, with a high near 99. Heat index values as high as 101. West southwest wind around 5 mph.
7-day forecast for Wynnburg
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 99°F | Sunny | 5 mph WSW | 0% |
| Tonight | 73°F | Mostly Clear | 0 to 5 mph SSW | 0% |
| Sunday | 99°F | Mostly Sunny | 0 to 10 mph WSW | 2% |
| Sunday Night | 73°F | Mostly Clear | 0 to 5 mph SW | 1% |
| Monday | 95°F | Mostly Sunny | 0 to 10 mph NNW | 10% |
| Monday Night | 68°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph NNE | 21% |
| Tuesday | 86°F | Slight Chance Showers And Thunderstorms | 5 to 15 mph N | 20% |
| Tuesday Night | 61°F | Partly Cloudy | 5 to 15 mph N | 12% |
| Wednesday | 82°F | Mostly Sunny | 10 mph N | 2% |
| Wednesday Night | 60°F | Mostly Clear | 5 to 10 mph N | 0% |
| Thursday | 82°F | Mostly Sunny | 5 to 10 mph NNE | 1% |
| Thursday Night | 61°F | Partly Cloudy | 0 to 10 mph NNE | 1% |
| Friday | 84°F | Mostly Sunny | 0 to 10 mph NNE | 2% |
| Friday Night | 62°F | Partly Cloudy | 5 to 10 mph NNE | 2% |
Forecast source: National Weather Service (api.weather.gov) for Wynnburg (36.330, -89.469). Updated through the day.
Growing snapshot for Wynnburg
Last spring frost
Apr 3
First fall frost
Nov 1
Growing season
211 days
Hardiness zone
7b
More local growing data for Wynnburg: nearby ZIP 38077 weather · frost dates · planting calendar · Tennessee frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Samburg Wr, Tn (12.8 mi from Wynnburg). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.