Lockhart Weather Forecast
- 76
- 100
Slight Chance Thunderstorms
- 76
- 100
Hot
- 75
- 101
Hot
- 75
- 99
Hot
- 72
- 96
Slight Chance Thunderstorms
- 72
- 98
Hot
- 72
- 98
Hot
Today 13 Sep Caldwell
Partly cloudy with a slight chance of Showers and Thunderstorms. Near steady temperature in the upper 90s. South Winds around 10 Mph with Gusts up to 20 Mph. Chance of rain 20 percent. Highest heat index Readings up to 107.
Tonight 13 Sep Caldwell
Mostly clear with a slight chance of Showers this Evening, then partly cloudy after midnight. Lows in the mid 70s. South Winds 5 to 10 Mph. Chance of rain 20 percent.
Lockhart Temperature Statistics
September Temperature
San Marcos, San Marcos Municipal Airport (11.2 miles)
Lowest 8 September, 2026
72 °FAverage September
86 °FHighest 2 September, 2026
102.9 °F
Climate (2021–2026)
San Marcos, San Marcos Municipal Airport (11.2 miles)
Average Low 2021–2026
60.1 °FAverage 2021–2026
71 °FAverage High 2021–2026
82.6 °F