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Castaic, CA Weather Forecast
Castaic, CA Weather Forecast Date: 755 AM PDT Thu Sep 24 2026
The area/counties/county of: Santa Clarita Valley, including: Lake Castaic, Newhall, Santa Clarita, and Valencia.or toggle through each period.
Today... Sunny. Highs in the lower to mid 90s. Southwest winds 10 to 20 mph in the afternoon.
Tonight... Clear. Lows in the lower to mid 60s.
Friday... Sunny. Highs in the lower to mid 90s.
Friday Night... Mostly clear. Lows in the mid 60s.
Saturday... Partly cloudy in the morning then sunny. Highs around 90. South winds 10 to 20 mph in the afternoon.
Saturday Night... Partly cloudy. Lows in the mid 60s.
Sunday... Sunny. Highs in the lower 80s.
Sunday Night... Mostly clear. Lows in the upper 50s.
Monday... Sunny. Highs around 80.
Monday Night... Mostly clear. Lows in the mid to upper 50s.
Tuesday... Sunny. Highs in the mid to upper 80s.
Tuesday Night... Clear. Lows around 60.
POP = Probability of Precipitation
Castaic Radar Loop
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