San Leon, TX Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for San Leon, a community in Galveston County, Texas.
Tonight
80°F
Clear
Clear, with a low around 80. Southeast wind 5 to 10 mph.
7-day forecast for San Leon
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 80°F | Clear | 5 to 10 mph SE | 0% |
| Saturday | 93°F | Sunny | 5 to 10 mph E | 2% |
| Saturday Night | 80°F | Mostly Clear then Slight Chance Rain Showers | 5 to 10 mph SE | 15% |
| Sunday | 93°F | Sunny then Slight Chance Showers And Thunderstorms | 5 to 10 mph E | 20% |
| Sunday Night | 80°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 5 to 10 mph S | 20% |
| Monday | 93°F | Mostly Sunny | 0 to 5 mph E | 10% |
| Monday Night | 82°F | Mostly Clear | 5 to 10 mph S | 10% |
| Tuesday | 93°F | Sunny | 5 mph NE | 12% |
| Tuesday Night | 83°F | Mostly Clear | 0 to 5 mph SE | 11% |
| Wednesday | 92°F | Sunny | 5 to 10 mph NE | 12% |
| Wednesday Night | 82°F | Mostly Clear | 5 to 10 mph E | 12% |
| Thursday | 91°F | Sunny | 10 to 15 mph NE | 12% |
| Thursday Night | 81°F | Mostly Clear | 5 to 10 mph NE | 12% |
| Friday | 90°F | Sunny | 10 to 15 mph NE | 6% |
Forecast source: National Weather Service (api.weather.gov) for San Leon (29.491, -94.941). Updated through the day.
Growing snapshot for San Leon
Last spring frost
Jan 31
First fall frost
Dec 14
Growing season
317 days
Hardiness zone
9b
More local growing data for San Leon: nearby ZIP 77518 weather · frost dates · planting calendar · Texas frost dates
Nearby towns & communities
Bacliff
Bayou Vista
Bolivar Peninsula
Clear Lake Shores
Dickinson
Friendswood
Galveston
Hitchcock
Jamaica Beach
Kemah
La Marque
League City
Santa Fe
Texas City
Tiki Island
Climate data from the nearest NOAA station, Houston Nwso, Tx (6.3 mi from San Leon). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.