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
71°F
Showers And Thunderstorms
Showers and thunderstorms before 2pm, then a slight chance of showers and thunderstorms between 2pm and 3pm. Mostly cloudy. High near 71, with temperatures falling to around 66 in the afternoon. South southwest wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between 1 and 2 inches possible.
7-day forecast for Castalian Springs
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 71°F | Showers And Thunderstorms | 5 to 15 mph SSW | 92% |
| Tonight | 46°F | Mostly Cloudy then Patchy Fog | 0 to 5 mph WSW | 1% |
| Thursday | 72°F | Areas Of Fog then Mostly Sunny | 0 to 5 mph WSW | 0% |
| Thursday Night | 42°F | Areas Of Fog | 0 mph | 0% |
| Friday | 68°F | Areas Of Fog then Mostly Sunny | 0 to 10 mph NNW | 0% |
| Friday Night | 38°F | Partly Cloudy | 5 to 10 mph NNW | 0% |
| Saturday | 59°F | Mostly Sunny | 5 to 10 mph N | 0% |
| Saturday Night | 32°F | Partly Cloudy | 0 to 5 mph N | 0% |
| Sunday | 59°F | Mostly Sunny | 0 to 10 mph N | 1% |
| Sunday Night | 31°F | Mostly Clear | 0 to 5 mph N | 1% |
| Monday | 62°F | Sunny | 0 to 5 mph SW | 0% |
| Monday Night | 32°F | Clear | 0 mph | 1% |
| Tuesday | 68°F | Sunny | 0 to 5 mph W | 1% |
| Tuesday Night | 35°F | Mostly Clear | 0 mph | 0% |
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 Nov 4, 2026.