Sweeny, TX Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Sweeny, a city in Brazoria County, Texas.
Overnight
72°F
Mostly Clear
Mostly clear, with a low around 72. Northeast wind around 0 mph.
7-day forecast for Sweeny
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 72°F | Mostly Clear | 0 mph | 6% |
| Saturday | 93°F | Sunny | 0 to 10 mph E | 5% |
| Saturday Night | 73°F | Mostly Clear | 0 to 10 mph E | 13% |
| Sunday | 93°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 0 to 5 mph E | 19% |
| Sunday Night | 75°F | Partly Cloudy | 0 to 5 mph E | 4% |
| Monday | 93°F | Sunny then Slight Chance Showers And Thunderstorms | 0 to 5 mph E | 19% |
| Monday Night | 74°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 0 to 5 mph E | 19% |
| Tuesday | 95°F | Sunny then Slight Chance Showers And Thunderstorms | 0 to 5 mph NE | 21% |
| Tuesday Night | 75°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 0 to 5 mph NE | 21% |
| Wednesday | 94°F | Sunny | 0 to 10 mph NE | 13% |
| Wednesday Night | 75°F | Mostly Clear | 0 to 5 mph NE | 13% |
| Thursday | 93°F | Sunny | 5 to 10 mph NE | 14% |
| Thursday Night | 73°F | Partly Cloudy | 0 to 5 mph E | 14% |
| Friday | 92°F | Mostly Sunny | 5 to 10 mph NE | 9% |
Forecast source: National Weather Service (api.weather.gov) for Sweeny (29.046, -95.699). Updated through the day.
Growing snapshot for Sweeny
Last spring frost
Feb 20
First fall frost
Dec 3
Growing season
290 days
Hardiness zone
9b
More local growing data for Sweeny: nearby ZIP 77480 weather · frost dates · planting calendar · Texas frost dates
Nearby towns & communities
Alvin
Angleton
Bailey's Prairie
Bonney
Brazoria
Clute
Danbury
East Columbia
Freeport
Hillcrest Village
Holiday Lakes
Iowa Colony
Jones Creek
Lake Jackson
Liverpool
Manvel
Oyster Creek
Pearland
Quintana
Richwood
Rosharon
Sandy Point
Surfside Beach
West Columbia
Wild Peach Village
Climate data from the nearest NOAA station, Bay City Wtr Wks, Tx (14.6 mi from Sweeny). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.