Castac Lake Weather Forecast
- 54
- 88
Mostly Sunny
- 52
- 72
Mostly Sunny
- 54
- 73
Sunny
- 55
- 78
Sunny
- 51
- 74
Mostly Sunny
- 51
- 73
Mostly Sunny
Today 12 May Grapevine
Sunny. Highs 85 to 95. East Winds up to 10 Mph with Gusts to around 25 Mph.
Tonight 12 May Grapevine
Mostly clear. Lows in the mid 50s. Southwest Winds 5 to 10 Mph shifting to the west after midnight.
Castac Lake Temperature Statistics
May Temperature
Sandberg (8.7 miles)
Lowest 4 May, 2026
38.6 °FAverage May
58.7 °FHighest 7 May, 2026
79.6 °F
Climate (2021–Present)
Sandberg (8.7 miles)
Average Low 2021–2026
51.5 °FAverage 2021–2026
59.4 °FAverage High 2021–2026
68.1 °F