Castalian Springs, TN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Castalian Springs, a community in Sumner County, Tennessee.
This Afternoon
99°F
Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms after 3pm. Sunny. High near 99, with temperatures falling to around 95 in the afternoon. Heat index values as high as 104. Northwest wind around 5 mph. Chance of precipitation is 20%.
7-day forecast for Castalian Springs
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 99°F | Slight Chance Showers And Thunderstorms | 5 mph NW | 19% |
| Tonight | 72°F | Mostly Clear | 0 to 5 mph SE | 11% |
| Sunday | 98°F | Sunny then Slight Chance Showers And Thunderstorms | 0 to 5 mph SSW | 15% |
| Sunday Night | 72°F | Partly Cloudy | 0 to 5 mph SE | 9% |
| Monday | 96°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 0 to 5 mph WSW | 23% |
| Monday Night | 68°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 0 to 5 mph NE | 32% |
| Tuesday | 90°F | Chance Showers And Thunderstorms | 0 to 10 mph NNE | 48% |
| Tuesday Night | 63°F | Chance Showers And Thunderstorms | 5 to 10 mph N | 48% |
| Wednesday | 82°F | Chance Rain Showers | 5 mph NNW | 48% |
| Wednesday Night | 61°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph N | 30% |
| Thursday | 81°F | Mostly Sunny | 0 to 10 mph N | 11% |
| Thursday Night | 59°F | Partly Cloudy | 5 to 10 mph NNE | 11% |
| Friday | 81°F | Mostly Sunny | 5 to 10 mph NNE | 5% |
| Friday Night | 57°F | Partly Cloudy | 5 to 10 mph NNE | 4% |
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 Sep 19, 2026.