Brentwood, TN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Brentwood, a city in Williamson County, Tennessee.
Today
89°F
Sunny
Sunny, with a high near 89. North northeast wind around 5 mph.
7-day forecast for Brentwood
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 89°F | Sunny | 5 mph NNE | 10% |
| Tonight | 70°F | Mostly Clear then Patchy Fog | 0 to 5 mph N | 10% |
| Wednesday | 90°F | Patchy Fog then Slight Chance Showers And Thunderstorms | 0 to 5 mph W | 22% |
| Wednesday Night | 71°F | Partly Cloudy | 0 to 5 mph S | 11% |
| Thursday | 91°F | Sunny then Slight Chance Showers And Thunderstorms | 5 mph SSW | 16% |
| Thursday Night | 72°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph S | 21% |
| Friday | 91°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 5 mph SSW | 37% |
| Friday Night | 71°F | Chance Showers And Thunderstorms | 5 mph S | 37% |
| Saturday | 90°F | Chance Showers And Thunderstorms | 5 mph SSW | 49% |
| Saturday Night | 71°F | Chance Showers And Thunderstorms then Partly Cloudy | 5 mph S | 49% |
| Sunday | 90°F | Chance Showers And Thunderstorms | 5 mph SSW | 32% |
| Sunday Night | 72°F | Chance Showers And Thunderstorms then Partly Cloudy | 5 mph S | 32% |
| Monday | 91°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 mph SSW | 23% |
| Monday Night | 72°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 5 mph SSW | 23% |
Forecast source: National Weather Service (api.weather.gov) for Brentwood (35.994, -86.771). Updated through the day.
Growing snapshot for Brentwood
Last spring frost
Apr 15
First fall frost
Oct 26
Growing season
193 days
Hardiness zone
7b
More local growing data for Brentwood: nearby ZIP 37027 weather · frost dates · planting calendar · Tennessee frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Brentwood, Tn (0.7 mi from Brentwood). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.