Sienna, TX Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Sienna, a community in Fort Bend County, Texas.
This Afternoon
95°F
Sunny
Sunny, with a high near 95. East wind around 10 mph.
7-day forecast for Sienna
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 95°F | Sunny | 10 mph E | 0% |
| Tonight | 72°F | Clear | 0 to 10 mph E | 0% |
| Saturday | 95°F | Sunny | 0 to 10 mph E | 1% |
| Saturday Night | 73°F | Clear | 0 to 10 mph SE | 1% |
| Sunday | 95°F | Sunny then Slight Chance Showers And Thunderstorms | 0 to 10 mph SE | 20% |
| Sunday Night | 75°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 0 to 10 mph SE | 20% |
| Monday | 96°F | Mostly Sunny | 0 to 5 mph SE | 11% |
| Monday Night | 74°F | Mostly Clear | 0 to 5 mph S | 11% |
| Tuesday | 97°F | Sunny | 0 to 5 mph NE | 11% |
| Tuesday Night | 76°F | Mostly Clear | 0 to 5 mph S | 11% |
| Wednesday | 96°F | Sunny | 0 to 10 mph NE | 8% |
| Wednesday Night | 76°F | Mostly Clear | 0 to 10 mph NE | 8% |
| Thursday | 95°F | Sunny | 5 to 10 mph NE | 9% |
| Thursday Night | 75°F | Mostly Clear | 0 to 10 mph NE | 9% |
Forecast source: National Weather Service (api.weather.gov) for Sienna (29.485, -95.506). Updated through the day.
Growing snapshot for Sienna
Last spring frost
Feb 15
First fall frost
Dec 6
Growing season
297 days
Hardiness zone
9b
More local growing data for Sienna: nearby ZIP 77459 weather · frost dates · planting calendar · Texas frost dates
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Climate data from the nearest NOAA station, Thompsons 3 Wsw, Tx (6.6 mi from Sienna). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.