Fincastle, TN Weather & Growing Conditions
Today
91°F
Mostly Sunny then Chance Showers And Thunderstorms
A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 91. Heat index values as high as 98. Northeast wind around 0 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 91°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 mph | 28% |
| Tonight | 68°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 mph | 25% |
| Sunday | 90°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 0 to 5 mph S | 18% |
| Sunday Night | 67°F | Chance Showers And Thunderstorms | 0 mph | 33% |
| Monday | 88°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 0 mph | 52% |
| Monday Night | 66°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 0 mph | 63% |
| Tuesday | 82°F | Showers And Thunderstorms | 0 mph | 84% |
| Tuesday Night | 63°F | Showers And Thunderstorms | 0 mph | 84% |
| Wednesday | 77°F | Showers And Thunderstorms | 0 mph | 80% |
| Wednesday Night | 60°F | Showers And Thunderstorms | 0 mph | 80% |
| Thursday | 75°F | Chance Rain Showers | 0 to 5 mph N | 41% |
| Thursday Night | 58°F | Chance Rain Showers then Partly Cloudy | 0 to 5 mph N | 32% |
| Friday | 75°F | Mostly Sunny | 0 to 5 mph N | 12% |
| Friday Night | 55°F | Partly Cloudy | 0 to 5 mph N | 12% |
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 19, 2026.