Harrison, TN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Harrison, a community in Hamilton County, Tennessee.
This Afternoon
75°F
Partly Sunny
Partly sunny, with a high near 75. Southeast wind around 15 mph, with gusts as high as 25 mph.
7-day forecast for Harrison
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 75°F | Partly Sunny | 15 mph SE | 1% |
| Tonight | 65°F | Chance Showers And Thunderstorms | 10 to 15 mph SE | 46% |
| Wednesday | 70°F | Showers And Thunderstorms | 10 to 15 mph S | 99% |
| Wednesday Night | 61°F | Showers And Thunderstorms then Partly Cloudy | 0 to 10 mph SW | 76% |
| Thursday | 74°F | Mostly Sunny | 0 to 5 mph SW | 9% |
| Thursday Night | 52°F | Partly Cloudy | 0 mph | 9% |
| Friday | 72°F | Sunny | 0 to 5 mph NW | 3% |
| Friday Night | 47°F | Mostly Clear | 0 to 5 mph NW | 1% |
| Saturday | 64°F | Mostly Sunny | 5 to 10 mph N | 1% |
| Saturday Night | 42°F | Partly Cloudy | 5 to 10 mph N | 1% |
| Sunday | 63°F | Mostly Sunny | 5 mph N | 5% |
| Sunday Night | 39°F | Mostly Clear | 0 to 5 mph NW | 7% |
| Monday | 64°F | Sunny | 0 to 5 mph NW | 6% |
| Monday Night | 39°F | Mostly Clear | 0 to 5 mph N | 2% |
Forecast source: National Weather Service (api.weather.gov) for Harrison (35.125, -85.147). Updated through the day.
Growing snapshot for Harrison
Last spring frost
Mar 24
First fall frost
Nov 9
Growing season
230 days
Hardiness zone
8a
More local growing data for Harrison: nearby ZIP 37416 weather · frost dates · planting calendar · Tennessee frost dates
Nearby towns & communities
Apison
Chattanooga
Collegedale
East Ridge
Fairmount
Falling Water
Flat Top Mountain
Graysville
Lakesite
Lone Oak
Lookout Mountain
Middle Valley
Mowbray Mountain
Ooltewah
Red Bank
Ridgeside
Sale Creek
Soddy-Daisy
Walden
Climate data from the nearest NOAA station, Chattanooga Lovell Ap, Tn (5.3 mi from Harrison). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.