Fincastle, TN Weather & Growing Conditions
Tonight
68°F
Partly Cloudy
Partly cloudy, with a low around 68. Wind around 0 mph. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 68°F | Partly Cloudy | 0 mph | 10% |
| Sunday | 90°F | Mostly Sunny | 0 to 5 mph S | 13% |
| Sunday Night | 68°F | Partly Cloudy | 0 mph | 13% |
| Monday | 89°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 mph | 52% |
| Monday Night | 66°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 0 mph | 57% |
| Tuesday | 83°F | Showers And Thunderstorms | 0 mph | 79% |
| Tuesday Night | 64°F | Showers And Thunderstorms | 0 mph | 79% |
| Wednesday | 78°F | Showers And Thunderstorms | 0 mph | 83% |
| Wednesday Night | 61°F | Showers And Thunderstorms | 0 mph | 83% |
| Thursday | 76°F | Rain Showers Likely | 0 mph | 55% |
| Thursday Night | 57°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 mph | 41% |
| Friday | 76°F | Mostly Sunny then Slight Chance Rain Showers | 0 to 5 mph N | 15% |
| Friday Night | 55°F | Slight Chance Rain Showers then Partly Cloudy | 0 to 5 mph N | 15% |
| Saturday | 76°F | Mostly Sunny | 0 to 5 mph N | 9% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Fincastle, TN
Last spring frost
Apr 18
First fall frost
Oct 24
Growing season
187 days
Hardiness zone
7a
Explore more for Fincastle, TN: full frost dates · planting calendar · Tennessee frost dates
Climate data from the nearest NOAA station, Newcomb, Tn (12 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.