Mountain Brook, AL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mountain Brook, a city in Jefferson County, Alabama.
Today
87°F
Chance Showers And Thunderstorms
A slight chance of rain showers between 10am and 1pm, then a chance of showers and thunderstorms. Mostly sunny. High near 87, with temperatures falling to around 81 in the afternoon. North wind 0 to 5 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Mountain Brook
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 87°F | Chance Showers And Thunderstorms | 0 to 5 mph N | 45% |
| Tonight | 70°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 mph | 39% |
| Wednesday | 88°F | Chance Showers And Thunderstorms | 0 to 5 mph SW | 46% |
| Wednesday Night | 71°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 mph | 46% |
| Thursday | 90°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 0 to 5 mph S | 18% |
| Thursday Night | 72°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph SE | 18% |
| Friday | 90°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 0 to 5 mph SE | 20% |
| Friday Night | 72°F | Slight Chance Showers And Thunderstorms | 0 to 5 mph E | 20% |
| Saturday | 90°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph SE | 30% |
| Saturday Night | 72°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 mph | 30% |
| Sunday | 90°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph SE | 39% |
| Sunday Night | 72°F | Chance Showers And Thunderstorms | 0 mph | 39% |
| Monday | 90°F | Chance Showers And Thunderstorms | 0 to 5 mph SW | 43% |
| Monday Night | 73°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph W | 43% |
Forecast source: National Weather Service (api.weather.gov) for Mountain Brook (33.491, -86.734). Updated through the day.
Growing snapshot for Mountain Brook
Last spring frost
Mar 21
First fall frost
Nov 11
Growing season
236 days
Hardiness zone
8b
More local growing data for Mountain Brook: nearby ZIP 35223 weather · frost dates · planting calendar · Alabama frost dates
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Climate data from the nearest NOAA station, Birmingham Ap, Al (5.2 mi from Mountain Brook). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.