Fincastle, TN Weather & Growing Conditions
Today
70°F
Slight Chance Showers And Thunderstorms then Showers And Thunderstorms
A slight chance of rain showers before 7am, then a slight chance of showers and thunderstorms between 7am and 8am, then showers and thunderstorms. Cloudy. High near 70, with temperatures falling to around 67 in the afternoon. South wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 70°F | Slight Chance Showers And Thunderstorms then Showers And Thunderstorms | 5 to 15 mph S | 80% |
| Tonight | 58°F | Showers And Thunderstorms | 0 to 5 mph W | 93% |
| Thursday | 73°F | Mostly Sunny | 0 to 5 mph W | 4% |
| Thursday Night | 48°F | Partly Cloudy | 0 mph | 4% |
| Friday | 70°F | Sunny | 0 to 5 mph NW | 4% |
| Friday Night | 43°F | Partly Cloudy | 5 mph NW | 1% |
| Saturday | 59°F | Mostly Sunny | 5 mph N | 0% |
| Saturday Night | 35°F | Partly Cloudy | 0 to 5 mph N | 0% |
| Sunday | 60°F | Mostly Sunny | 0 to 5 mph N | 0% |
| Sunday Night | 34°F | Mostly Clear | 0 to 5 mph NW | 1% |
| Monday | 62°F | Sunny | 0 mph | 1% |
| Monday Night | 36°F | Mostly Clear | 0 mph | 1% |
| Tuesday | 67°F | Sunny | 0 mph | 2% |
| Tuesday Night | 38°F | Mostly Clear | 0 mph | 2% |
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 Nov 4, 2026.