Harriman, TN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Harriman, a city in Roane County, Tennessee.
This Afternoon
69°F
Showers And Thunderstorms
Showers and thunderstorms. Cloudy, with a high near 69. South wind around 10 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for Harriman
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 69°F | Showers And Thunderstorms | 10 mph S | 98% |
| Tonight | 58°F | Showers And Thunderstorms then Mostly Cloudy | 0 to 5 mph SW | 89% |
| Thursday | 71°F | Mostly Sunny | 0 mph | 0% |
| Thursday Night | 47°F | Partly Cloudy | 0 mph | 0% |
| Friday | 69°F | Sunny | 0 to 5 mph NW | 0% |
| Friday Night | 43°F | Partly Cloudy | 5 mph N | 0% |
| Saturday | 59°F | Sunny | 5 mph N | 0% |
| Saturday Night | 35°F | Partly Cloudy | 0 to 5 mph N | 0% |
| Sunday | 61°F | Sunny | 0 mph | 0% |
| Sunday Night | 35°F | Mostly Clear | 0 mph | 0% |
| Monday | 64°F | Sunny | 0 mph | 1% |
| Monday Night | 36°F | Mostly Clear | 0 mph | 3% |
| Tuesday | 65°F | Mostly Sunny | 0 mph | 3% |
| Tuesday Night | 39°F | Partly Cloudy | 0 mph | 2% |
Forecast source: National Weather Service (api.weather.gov) for Harriman (35.930, -84.563). Updated through the day.
Growing snapshot for Harriman
Last spring frost
Apr 3
First fall frost
Nov 4
Growing season
215 days
Hardiness zone
7b
More local growing data for Harriman: nearby ZIP 37748 weather · frost dates · planting calendar · Tennessee frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Kingston, Tn (6.1 mi from Harriman). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 5, 2026.