Castalian Springs, TN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Castalian Springs, a community in Sumner County, Tennessee.
Today
89°F
Sunny
Sunny, with a high near 89. North northeast wind around 5 mph.
7-day forecast for Castalian Springs
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 89°F | Sunny | 5 mph NNE | 4% |
| Tonight | 69°F | Mostly Clear then Patchy Fog | 0 to 5 mph N | 6% |
| Wednesday | 90°F | Patchy Fog then Chance Showers And Thunderstorms | 0 to 5 mph W | 29% |
| Wednesday Night | 70°F | Partly Cloudy then Patchy Fog | 0 mph | 13% |
| Thursday | 92°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 0 to 5 mph SSW | 22% |
| Thursday Night | 72°F | Slight Chance Showers And Thunderstorms | 0 to 5 mph SSE | 23% |
| Friday | 92°F | Chance Showers And Thunderstorms | 5 mph SSW | 35% |
| Friday Night | 71°F | Chance Showers And Thunderstorms | 0 to 5 mph S | 35% |
| Saturday | 90°F | Chance Showers And Thunderstorms | 0 to 5 mph SSW | 51% |
| Saturday Night | 71°F | Chance Showers And Thunderstorms | 0 mph | 51% |
| Sunday | 91°F | Chance Showers And Thunderstorms | 0 to 5 mph SSW | 34% |
| Sunday Night | 72°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 mph | 34% |
| Monday | 92°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 0 to 5 mph SSW | 20% |
| Monday Night | 73°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph S | 20% |
Forecast source: National Weather Service (api.weather.gov) for Castalian Springs (36.401, -86.307). Updated through the day.
Growing snapshot for Castalian Springs
Last spring frost
Apr 16
First fall frost
Oct 23
Growing season
189 days
Hardiness zone
7b
More local growing data for Castalian Springs: nearby ZIP 37031 weather · frost dates · planting calendar · Tennessee frost dates
Nearby towns & communities
Bethpage
Bransford
Cottontown
Gallatin
Graball
Hendersonville
Mitchellville
New Deal
Oak Grove
Portland
Shackle Island
Walnut Grove
Westmoreland
Climate data from the nearest NOAA station, Bethpage 1 S, Tn (5.7 mi from Castalian Springs). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.