Weather in Castaic, CA
Updated 2026-09-26 06:45 local time · ZIP codes 91384
Cloudy
No government weather alerts were returned for this location at the latest update.
Next hours
68°10% rain
71°5% rain
74°1% rain78°1% rain81°6% rain
83°9% rain84°1% rain85°0% rain85°9% rain84°2% rain82°3% rain78°9% rain3-day weather forecast
Weather details
Sunrise, sunset and moon
Key weather changes ahead
Weather insights for today
Rain chance stays relatively low over the next 12 hours (up to 12%).
It feels like 66°F with winds near 4 mph.
71°F, 5% rain chance and 3 mph wind.
Visibility is around 6 mi; gusts may reach 17 mph.
Current temperature is 68°F, wind 4 mph, rain chance up to 12%.
UV index is 0.
Local weather characteristics in Castaic
California weather varies from cool marine conditions along parts of the Pacific coast to hot inland valleys, deserts and snowy mountain climates. Short distances can produce large temperature differences.
Castaic is part of the West weather region. The forecast point is near 34.49°N latitude and 118.62°W longitude. Local temperature, wind and precipitation can still differ from nearby places, especially where terrain, coastlines or urban development create small-scale weather changes.
Castaic weather today
Cloudy and 68°F in Castaic, CA. Today's high is 85°F with a 5% rain chance. Winds are around 4 mph with gusts near 4 mph. Relative humidity is 52%, pressure is 29.89 inHg, and visibility is about 6 miles.
Tonight and tomorrow in Castaic
Sunrise is at 06:45 AM and sunset is at 06:46 PM. Tomorrow's forecast calls for Sunny with a high near 81°F and a low near 63°F. The maximum rain chance is 2%.