Cosby, TN Weather & Growing Conditions
Today
69°F
Chance Rain Showers then Chance Showers And Thunderstorms
A chance of rain showers before 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 69, with temperatures falling to around 66 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
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 69°F | Chance Rain Showers then Chance Showers And Thunderstorms | 5 to 10 mph NE | 62% |
| Tonight | 60°F | Showers And Thunderstorms | 0 to 5 mph E | 81% |
| Thursday | 69°F | Chance Rain Showers then Partly Sunny | 0 to 5 mph W | 30% |
| Thursday Night | 54°F | Mostly Cloudy | 0 mph | 11% |
| Friday | 66°F | Mostly Sunny | 0 to 10 mph NW | 11% |
| Friday Night | 46°F | Mostly Cloudy then Slight Chance Rain Showers | 0 to 5 mph NW | 16% |
| Saturday | 56°F | Slight Chance Rain Showers then Mostly Sunny | 0 to 5 mph NW | 16% |
| Saturday Night | 38°F | Partly Cloudy | 0 mph | 0% |
| Sunday | 58°F | Mostly Sunny | 0 to 5 mph N | 1% |
| Sunday Night | 38°F | Partly Cloudy | 0 to 5 mph SW | 2% |
| Monday | 60°F | Sunny | 0 to 5 mph W | 4% |
| Monday Night | 40°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 (6.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.