Cosby, TN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Cosby, a community in Cocke County, Tennessee.
Tonight
69°F
Slight Chance Rain Showers then Partly Cloudy
A slight chance of rain showers before midnight. Partly cloudy, with a low around 69. Wind around 0 mph. Chance of precipitation is 20%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Cosby
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 69°F | Slight Chance Rain Showers then Partly Cloudy | 0 mph | 18% |
| Saturday | 88°F | Sunny then Chance Showers And Thunderstorms | 0 to 5 mph N | 27% |
| Saturday Night | 68°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph SE | 26% |
| Sunday | 86°F | Showers And Thunderstorms Likely | 0 to 5 mph SW | 59% |
| Sunday Night | 68°F | Showers And Thunderstorms Likely then Partly Cloudy | 0 mph | 59% |
| Monday | 87°F | Showers And Thunderstorms Likely | 0 mph | 62% |
| Monday Night | 67°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 0 mph | 62% |
| Tuesday | 82°F | Showers And Thunderstorms | 0 mph | 92% |
| Tuesday Night | 65°F | Showers And Thunderstorms | 0 mph | 92% |
| Wednesday | 76°F | Rain Showers Likely | 0 mph | 73% |
| Wednesday Night | 62°F | Showers And Thunderstorms Likely | 0 mph | 73% |
| Thursday | 74°F | Chance Rain Showers | 0 to 5 mph NW | 49% |
| Thursday Night | 60°F | Chance Rain Showers | 0 mph | 46% |
| Friday | 75°F | Chance Rain Showers | 0 to 5 mph N | 25% |
Forecast source: National Weather Service (api.weather.gov) for Cosby (35.795, -83.246). Updated through the day.
Growing snapshot for Cosby
Last spring frost
Apr 6
First fall frost
Nov 1
Growing season
210 days
Hardiness zone
7b
More local growing data for Cosby: nearby ZIP 37722 weather · frost dates · planting calendar · Tennessee frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Waterville 2, Nc (6.3 mi from Cosby). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.