Cosby, TN Weather & Growing Conditions
Today
70°F
Showers And Thunderstorms Likely
A chance of rain showers between 7am and 1pm, then showers and thunderstorms likely. Mostly cloudy. High near 70, with temperatures falling to around 66 in the afternoon. South wind 10 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 70°F | Showers And Thunderstorms Likely | 10 to 20 mph S | 62% |
| Tonight | 60°F | Showers And Thunderstorms | 0 to 10 mph SE | 82% |
| Thursday | 70°F | Slight Chance Rain Showers then Partly Sunny | 0 to 5 mph W | 23% |
| Thursday Night | 54°F | Mostly Cloudy | 0 mph | 11% |
| Friday | 67°F | Mostly Sunny | 0 to 5 mph NW | 11% |
| Friday Night | 47°F | Mostly Cloudy | 0 to 5 mph NW | 14% |
| Saturday | 57°F | Mostly Sunny | 0 to 5 mph NW | 14% |
| Saturday Night | 39°F | Partly Cloudy | 0 mph | 0% |
| Sunday | 58°F | Mostly Sunny | 0 to 5 mph NE | 1% |
| Sunday Night | 39°F | Partly Cloudy | 0 mph | 2% |
| Monday | 60°F | Sunny | 0 to 5 mph W | 4% |
| Monday Night | 41°F | Mostly Clear | 0 mph | 4% |
| Tuesday | 63°F | Sunny | 0 to 5 mph W | 2% |
| Tuesday Night | 43°F | Mostly Clear | 0 mph | 2% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Cosby, TN
Last spring frost
Apr 6
First fall frost
Nov 1
Growing season
210 days
Hardiness zone
7b
Explore more for Cosby, TN: full frost dates · planting calendar · Tennessee frost dates
Climate data from the nearest NOAA station, Waterville 2, Nc (3.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.