Cosby, TN Weather & Growing Conditions
Today
84°F
Sunny then Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms after 2pm. Sunny, with a high near 84. North wind 0 to 5 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 84°F | Sunny then Slight Chance Showers And Thunderstorms | 0 to 5 mph N | 19% |
| Tonight | 68°F | Chance Showers And Thunderstorms then Mostly Clear | 0 to 5 mph SE | 25% |
| Sunday | 82°F | Slight Chance Showers And Thunderstorms | 0 to 5 mph SW | 41% |
| Sunday Night | 68°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph S | 47% |
| Monday | 82°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph SW | 53% |
| Monday Night | 67°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 0 to 5 mph SE | 56% |
| Tuesday | 77°F | Showers And Thunderstorms | 0 mph | 94% |
| Tuesday Night | 65°F | Showers And Thunderstorms | 0 to 5 mph SE | 94% |
| Wednesday | 72°F | Showers And Thunderstorms | 0 to 5 mph S | 84% |
| Wednesday Night | 61°F | Showers And Thunderstorms | 0 to 5 mph S | 84% |
| Thursday | 70°F | Chance Rain Showers | 0 to 5 mph W | 53% |
| Thursday Night | 59°F | Chance Rain Showers | 0 mph | 53% |
| Friday | 69°F | Chance Rain Showers | 0 to 5 mph NE | 34% |
| Friday Night | 57°F | Chance Rain Showers | 0 to 5 mph NE | 34% |
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 (6.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.