Fincastle, TN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Fincastle, a community in Campbell County, Tennessee.
This Afternoon
75°F
Sunny
Sunny. High near 75, with temperatures falling to around 71 in the afternoon. South wind 0 to 5 mph.
7-day forecast for Fincastle
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 75°F | Sunny | 0 to 5 mph S | 1% |
| Tonight | 59°F | Mostly Cloudy then Slight Chance Rain Showers | 0 to 5 mph SE | 16% |
| Wednesday | 70°F | Showers And Thunderstorms | 5 to 10 mph S | 94% |
| Wednesday Night | 59°F | Showers And Thunderstorms | 0 to 5 mph SW | 98% |
| Thursday | 73°F | Mostly Sunny | 0 to 5 mph W | 10% |
| Thursday Night | 50°F | Mostly Cloudy | 0 mph | 8% |
| Friday | 70°F | Mostly Sunny | 0 to 5 mph NW | 5% |
| Friday Night | 44°F | Partly Cloudy | 0 to 5 mph NW | 5% |
| Saturday | 62°F | Mostly Sunny | 0 to 5 mph N | 1% |
| Saturday Night | 37°F | Partly Cloudy | 0 to 5 mph N | 2% |
| Sunday | 62°F | Mostly Sunny | 0 to 5 mph NW | 6% |
| Sunday Night | 35°F | Partly Cloudy | 0 to 5 mph NW | 9% |
| Monday | 63°F | Sunny | 0 to 5 mph W | 10% |
| Monday Night | 36°F | Mostly Clear | 0 mph | 7% |
Forecast source: National Weather Service (api.weather.gov) for Fincastle (36.404, -84.048). Updated through the day.
Growing snapshot for Fincastle
Last spring frost
Apr 18
First fall frost
Oct 24
Growing season
187 days
Hardiness zone
7a
More local growing data for Fincastle: nearby ZIP 37766 weather · frost dates · planting calendar · Tennessee frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Newcomb, Tn (12 mi from Fincastle). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.