Sour Lake, TX Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Sour Lake, a city in Hardin County, Texas.
Today
94°F
Sunny
Sunny, with a high near 94. Heat index values as high as 102. South wind 0 to 5 mph. Chance of precipitation is 20%.
7-day forecast for Sour Lake
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 94°F | Sunny | 0 to 5 mph S | 17% |
| Tonight | 74°F | Mostly Clear | 0 to 10 mph S | 13% |
| Wednesday | 94°F | Sunny then Slight Chance Showers And Thunderstorms | 0 to 5 mph S | 21% |
| Wednesday Night | 74°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 0 to 5 mph W | 17% |
| Thursday | 93°F | Sunny then Chance Showers And Thunderstorms | 0 to 5 mph S | 28% |
| Thursday Night | 73°F | Chance Showers And Thunderstorms then Mostly Clear | 0 to 5 mph E | 28% |
| Friday | 91°F | Sunny then Chance Showers And Thunderstorms | 0 to 5 mph SE | 42% |
| Friday Night | 73°F | Chance Showers And Thunderstorms | 0 to 5 mph SE | 42% |
| Saturday | 91°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 0 to 5 mph E | 39% |
| Saturday Night | 73°F | Chance Showers And Thunderstorms then Mostly Clear | 0 to 5 mph E | 39% |
| Sunday | 90°F | Chance Showers And Thunderstorms | 0 to 5 mph SE | 53% |
| Sunday Night | 73°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph E | 53% |
| Monday | 90°F | Showers And Thunderstorms Likely | 0 to 5 mph W | 58% |
| Monday Night | 74°F | Showers And Thunderstorms Likely then Partly Cloudy | 0 to 5 mph E | 58% |
Forecast source: National Weather Service (api.weather.gov) for Sour Lake (30.138, -94.404). Updated through the day.
Growing snapshot for Sour Lake
Last spring frost
Feb 18
First fall frost
Dec 2
Growing season
291 days
Hardiness zone
9a
More local growing data for Sour Lake: nearby ZIP 77659 weather · frost dates · planting calendar · Texas frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Beaumont Rsch Ctr, Tx (10.9 mi from Sour Lake). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.