Cosby, TN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Cosby, a community in Cocke County, Tennessee.
Today
73°F
Chance Showers And Thunderstorms
A slight chance of rain showers before 10am, then a chance of showers and thunderstorms between 10am and 1pm, then a chance of showers and thunderstorms between 1pm and 2pm, then showers and thunderstorms likely between 2pm and 3pm, then a chance of showers and thunderstorms between 3pm and 4pm, then showers and thunderstorms likely. Mostly cloudy. High near 73, with temperatures falling to around 69 in the afternoon. Northeast wind 5 to 10 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Cosby
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 73°F | Chance Showers And Thunderstorms | 5 to 10 mph NE | 61% |
| Tonight | 61°F | Showers And Thunderstorms | 0 to 5 mph W | 81% |
| Thursday | 73°F | Chance Rain Showers then Partly Sunny | 0 to 5 mph W | 32% |
| Thursday Night | 53°F | Mostly Cloudy | 0 mph | 12% |
| Friday | 70°F | Mostly Sunny | 0 to 5 mph NW | 12% |
| Friday Night | 46°F | Mostly Cloudy then Slight Chance Rain Showers | 0 to 5 mph NW | 17% |
| Saturday | 60°F | Slight Chance Rain Showers then Mostly Sunny | 0 to 5 mph NW | 17% |
| Saturday Night | 37°F | Partly Cloudy | 0 mph | 0% |
| Sunday | 61°F | Mostly Sunny | 0 to 5 mph N | 1% |
| Sunday Night | 37°F | Partly Cloudy | 0 mph | 2% |
| Monday | 63°F | Sunny | 0 to 5 mph W | 3% |
| Monday Night | 39°F | Mostly Clear | 0 mph | 3% |
| Tuesday | 67°F | Sunny | 0 to 5 mph W | 2% |
| Tuesday Night | 42°F | Mostly Clear | 0 mph | 2% |
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 Nov 4, 2026.