Sweeny, TX Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Sweeny, a city in Brazoria County, Texas.
Today
78°F
Sunny
Sunny. High near 78, with temperatures falling to around 74 in the afternoon. North wind 0 to 5 mph.
7-day forecast for Sweeny
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 78°F | Sunny | 0 to 5 mph N | 0% |
| Tonight | 54°F | Mostly Clear | 0 to 5 mph SE | 0% |
| Thursday | 81°F | Mostly Sunny | 5 mph E | 12% |
| Thursday Night | 63°F | Chance Showers And Thunderstorms | 0 to 5 mph E | 28% |
| Friday | 80°F | Mostly Sunny | 5 to 10 mph N | 5% |
| Friday Night | 57°F | Partly Cloudy | 0 to 5 mph NE | 4% |
| Saturday | 77°F | Partly Sunny | 5 to 10 mph NE | 5% |
| Saturday Night | 54°F | Slight Chance Rain Showers then Mostly Cloudy | 5 to 10 mph NE | 15% |
| Sunday | 69°F | Slight Chance Rain Showers then Mostly Sunny | 5 to 10 mph N | 18% |
| Sunday Night | 49°F | Partly Cloudy | 0 to 5 mph N | 9% |
| Monday | 71°F | Mostly Sunny | 0 to 5 mph NE | 7% |
| Monday Night | 50°F | Partly Cloudy | 0 mph | 2% |
| Tuesday | 75°F | Mostly Sunny | 0 mph | 3% |
| Tuesday Night | 52°F | Mostly Cloudy | 0 mph | 7% |
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 Nov 4, 2026.