Cosby, TN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Cosby, a community in Cocke County, Tennessee.
Today
84°F
Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms before noon, then a chance of showers and thunderstorms between noon and 2pm, then showers and thunderstorms likely. Mostly sunny. High near 84, with temperatures falling to around 80 in the afternoon. Northwest wind around 0 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Cosby
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 84°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 0 mph | 73% |
| Tonight | 67°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 mph | 46% |
| Wednesday | 83°F | Showers And Thunderstorms Likely | 0 mph | 77% |
| Wednesday Night | 68°F | Showers And Thunderstorms Likely then Partly Cloudy | 0 mph | 65% |
| Thursday | 83°F | Showers And Thunderstorms | 0 mph | 81% |
| Thursday Night | 68°F | Showers And Thunderstorms then Mostly Cloudy | 0 mph | 81% |
| Friday | 84°F | Chance Showers And Thunderstorms | 0 mph | 79% |
| Friday Night | 68°F | Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 0 mph | 79% |
| Saturday | 84°F | Showers And Thunderstorms | 0 mph | 82% |
| Saturday Night | 69°F | Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 0 mph | 82% |
| Sunday | 84°F | Slight Chance Showers And Thunderstorms | 0 mph | 67% |
| Sunday Night | 70°F | Showers And Thunderstorms Likely then Slight Chance Showers And Thunderstorms | 0 mph | 67% |
| Monday | 85°F | Showers And Thunderstorms Likely | 0 to 5 mph W | 55% |
| Monday Night | 70°F | Showers And Thunderstorms Likely then Partly Cloudy | 0 mph | 55% |
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 Aug 4, 2026.