Cosby, TN Weather & Growing Conditions
Today
82°F
Mostly Sunny then Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms between noon and 1pm, then a chance of showers and thunderstorms between 1pm and 2pm, then a chance of showers and thunderstorms between 2pm and 3pm, then showers and thunderstorms between 3pm and 4pm, then showers and thunderstorms likely. Mostly sunny. High near 82, with temperatures falling to around 79 in the afternoon. West wind around 0 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 82°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 0 mph | 75% |
| Tonight | 66°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph S | 44% |
| Wednesday | 81°F | Chance Showers And Thunderstorms | 0 mph | 78% |
| Wednesday Night | 66°F | Showers And Thunderstorms Likely then Partly Cloudy | 0 mph | 68% |
| Thursday | 82°F | Showers And Thunderstorms | 0 mph | 84% |
| Thursday Night | 66°F | Showers And Thunderstorms then Mostly Cloudy | 0 mph | 84% |
| Friday | 83°F | Chance Showers And Thunderstorms | 0 mph | 79% |
| Friday Night | 67°F | Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 0 mph | 79% |
| Saturday | 82°F | Showers And Thunderstorms | 0 mph | 81% |
| Saturday Night | 67°F | Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 0 mph | 81% |
| Sunday | 83°F | Slight Chance Showers And Thunderstorms | 0 to 5 mph W | 65% |
| Sunday Night | 68°F | Showers And Thunderstorms Likely then Slight Chance Showers And Thunderstorms | 0 mph | 65% |
| Monday | 83°F | Chance Rain Showers then Chance Showers And Thunderstorms | 0 to 5 mph SW | 54% |
| Monday Night | 69°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 mph | 54% |
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 Aug 4, 2026.