Harman US

Alcoa, TN Weather & Growing Conditions

This Afternoon
94°F
Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms after 5pm. Sunny, with a high near 94. Heat index values as high as 102. North wind 0 to 5 mph. Chance of precipitation is 20%.

7-day forecast

WhenTempForecastWindPrecip
This Afternoon 94°F Slight Chance Showers And Thunderstorms 0 to 5 mph N 15%
Tonight 70°F Slight Chance Showers And Thunderstorms then Mostly Clear 0 to 5 mph SE 15%
Sunday 93°F Mostly Sunny 0 to 5 mph SW 13%
Sunday Night 69°F Slight Chance Showers And Thunderstorms then Partly Cloudy 0 to 5 mph SW 24%
Monday 93°F Mostly Sunny then Chance Showers And Thunderstorms 0 to 5 mph SW 31%
Monday Night 68°F Chance Showers And Thunderstorms then Showers And Thunderstorms Likely 0 to 5 mph NE 64%
Tuesday 87°F Showers And Thunderstorms 0 mph 88%
Tuesday Night 66°F Showers And Thunderstorms 0 to 5 mph NE 88%
Wednesday 82°F Showers And Thunderstorms 0 to 5 mph NW 80%
Wednesday Night 64°F Showers And Thunderstorms 0 to 5 mph N 80%
Thursday 80°F Chance Rain Showers 0 to 5 mph NW 39%
Thursday Night 61°F Chance Rain Showers 0 to 5 mph NE 27%
Friday 79°F Slight Chance Rain Showers 0 to 10 mph NE 17%
Friday Night 58°F Slight Chance Rain Showers then Partly Cloudy 5 to 10 mph NE 17%

Forecast source: National Weather Service (api.weather.gov). Updated through the day.

Growing snapshot for Alcoa, TN

Last spring frost
Apr 1
First fall frost
Nov 2
Growing season
215 days
Hardiness zone
7b

Explore more for Alcoa, TN: full frost dates · planting calendar · Tennessee frost dates

Climate data from the nearest NOAA station, Knoxville Mcghee Tyson Ap, Tn (1.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.