Castalian Springs, TN Weather & Growing Conditions
Overnight
72°F
Mostly Clear
Mostly clear, with a low around 72. East northeast wind around 0 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 72°F | Mostly Clear | 0 mph | 2% |
| Saturday | 99°F | Sunny then Slight Chance Showers And Thunderstorms | 0 to 5 mph WSW | 17% |
| Saturday Night | 72°F | Mostly Clear | 0 mph | 8% |
| Sunday | 98°F | Mostly Sunny | 0 to 5 mph SW | 5% |
| Sunday Night | 70°F | Partly Cloudy | 0 to 5 mph SSE | 10% |
| Monday | 96°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph WSW | 29% |
| Monday Night | 66°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 0 to 5 mph NNE | 56% |
| Tuesday | 87°F | Showers And Thunderstorms Likely | 0 to 10 mph N | 57% |
| Tuesday Night | 64°F | Showers And Thunderstorms Likely | 5 to 10 mph N | 57% |
| Wednesday | 83°F | Chance Rain Showers | 5 mph N | 25% |
| Wednesday Night | 61°F | Slight Chance Rain Showers then Partly Cloudy | 0 to 5 mph N | 24% |
| Thursday | 81°F | Mostly Sunny | 0 to 10 mph N | 11% |
| Thursday Night | 60°F | Partly Cloudy | 5 to 10 mph NNE | 8% |
| Friday | 81°F | Mostly Sunny | 5 to 10 mph NNE | 8% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Castalian Springs, TN
Last spring frost
Apr 16
First fall frost
Oct 23
Growing season
189 days
Hardiness zone
7b
Explore more for Castalian Springs, TN: full frost dates · planting calendar · Tennessee frost dates
Climate data from the nearest NOAA station, Bethpage 1 S, Tn (5.7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.