Brentwood, TN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Brentwood, a city in Williamson County, Tennessee.
This Afternoon
77°F
Partly Sunny
Partly sunny. High near 77, with temperatures falling to around 72 in the afternoon. South southeast wind 15 to 20 mph, with gusts as high as 30 mph.
7-day forecast for Brentwood
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 77°F | Partly Sunny | 15 to 20 mph SSE | 3% |
| Tonight | 63°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 15 mph SSE | 96% |
| Wednesday | 74°F | Showers And Thunderstorms | 5 to 15 mph SSW | 96% |
| Wednesday Night | 48°F | Partly Cloudy then Patchy Fog | 0 to 5 mph WSW | 1% |
| Thursday | 72°F | Patchy Fog then Mostly Sunny | 0 to 5 mph SW | 0% |
| Thursday Night | 46°F | Areas Of Fog | 0 mph | 0% |
| Friday | 69°F | Areas Of Fog then Mostly Sunny | 0 to 10 mph NNW | 3% |
| Friday Night | 41°F | Partly Cloudy | 5 mph NNW | 1% |
| Saturday | 61°F | Mostly Sunny | 5 to 10 mph N | 0% |
| Saturday Night | 36°F | Partly Cloudy | 0 to 5 mph NNW | 1% |
| Sunday | 63°F | Mostly Sunny | 0 to 5 mph NNW | 7% |
| Sunday Night | 35°F | Mostly Clear | 0 to 5 mph W | 7% |
| Monday | 64°F | Sunny | 0 to 5 mph W | 5% |
| Monday Night | 36°F | Mostly Clear | 0 to 5 mph WSW | 1% |
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 Nov 3, 2026.