Carter Lake Weather Forecast
- 30
- 61
Sunny
- 42
- 67
Mostly Sunny
- 51
- 60
Chance Rain Showers
- 49
- 65
Chance Rain Showers
- 46
- 65
Mostly Cloudy
- 52
- 69
Mostly Cloudy
- 40
- 68
Mostly Cloudy
Today 18 Jan Guadalupe
Sunny. Highs in the lower 60s. Southwest Winds 5 to 10 Mph.
Tonight 18 Jan Guadalupe
Clear, cold with Lows in the lower 30s. Southwest Winds around 5 Mph.
Carter Lake Temperature Statistics
January Temperature
San Marcos, San Marcos Municipal Airport (18 miles)
Lowest 15 January, 2026
35.1 °FAverage January
59.3 °FHighest 2 January, 2026
89.1 °F
Climate (2021–Present)
San Marcos, San Marcos Municipal Airport (18 miles)
Average Low 2021–2026
59.7 °FAverage 2021–2026
70.3 °FAverage High 2021–2026
82 °F