Skip to content

Checked

Castaic, CA Weather

Today: Patchy Fog then Partly Sunny, high 72°F, low 52°F. Hourly and 10-day forecast from the National Weather Service. Times are local (PDT).

Castaic, CA current weather

62°F

Patchy Fog

Forecast for this hour. No recent report from a nearby station.

H 72° / L 52°

No recent station report. NWS hourly forecast updated 10/28/2026, 1:41 AM PT

Hourly forecast

NWS, updated 10/28/2026, 1:41 AM PT

  1. Now62°
  2. 11 AM64°
  3. 12 PM67°
  4. 1 PM70°
  5. 2 PM71°
  6. 3 PM72°
  7. 4 PM71°
  8. 5 PM65°
  9. 6 PM61°
  10. 7 PM59°
  11. 8 PM58°
  12. 9 PM56°
  13. 10 PM55°
  14. 11 PM55°
  15. 12 AM55°Thu
  16. 1 AM55°
  17. 2 AM54°
  18. 3 AM54°
  19. 4 AM54°
  20. 5 AM54°
  21. 6 AM54°
  22. 7 AM52°
  23. 8 AM58°
  24. 9 AM60°
  25. 10 AM63°
  26. 11 AM65°
  27. 12 PM68°
  28. 1 PM69°
  29. 2 PM70°
  30. 3 PM70°
  31. 4 PM69°
  32. 5 PM67°
  33. 6 PM62°
  34. 7 PM60°
  35. 8 PM59°
  36. 9 PM59°
  37. 10 PM59°
  38. 11 PM59°11%
  39. 12 AM60°11%Fri
  40. 1 AM59°11%
  41. 2 AM59°11%
  42. 3 AM57°11%
  43. 4 AM55°11%
  44. 5 AM57°
  45. 6 AM58°
  46. 7 AM56°
  47. 8 AM54°
  48. 9 AM55°

10-day forecast

Tap a day for details

  • Today10/28Low 52°High 72°

    Today: Patchy fog before 11am. Partly sunny, with a high near 72. South southwest wind 0 to 10 mph.

    Tonight: Mostly cloudy, with a low around 52. North northwest wind 0 to 10 mph.

    Patchy Fog then Partly Sunny
  • Thu10/2911% chance of precipitationLow 54°High 70°

    Thursday: Partly sunny, with a high near 70. South southeast wind 0 to 10 mph.

    Thursday Night: Mostly cloudy, with a low around 54. Southwest wind 0 to 10 mph.

    Partly Sunny
  • Fri10/3011% chance of precipitationLow 52°High 66°

    Friday: Partly sunny, with a high near 66. South southwest wind 0 to 10 mph.

    Friday Night: Mostly cloudy, with a low around 52.

    Partly Sunny
  • Sat10/3155% chance of precipitationLow 51°High 64°

    Saturday: A chance of rain showers after 11am. Mostly cloudy, with a high near 64.

    Saturday Night: Rain showers likely. Mostly cloudy, with a low around 51.

    Chance Rain Showers
  • Sun11/135% chance of precipitationLow 49°High 66°

    Sunday: A chance of rain showers before 4pm. Mostly sunny, with a high near 66.

    Sunday Night: Mostly clear, with a low around 49.

    Chance Rain Showers
  • Mon11/2Low 51°High 70°

    Monday: Sunny, with a high near 70.

    Monday Night: Mostly clear, with a low around 51.

    Sunny
  • Tue11/311% chance of precipitationLow 50°High 71°

    Tuesday: Mostly sunny, with a high near 71.

    Tuesday Night: Partly cloudy, with a low around 50.

    Mostly Sunny
  • Wed11/4Model blendLow 56°High 74°

    Wednesday: Mostly sunny. High near 74°. Low that night near 56°.

    Computer model guidance from the NOAA National Blend of Models, not a forecast written by NWS forecasters. Expect changes this far out.

  • Thu11/5Model blend12% chance of precipitationLow 56°High 72°

    Thursday: Partly cloudy. High near 72°. Low that night near 56°. About 0.01 in of precipitation.

    Computer model guidance from the NOAA National Blend of Models, not a forecast written by NWS forecasters. Expect changes this far out.

  • Fri11/6Model blend12% chance of precipitationLow High 71°

    Friday: Partly cloudy. High near 71°. About 0.05 in of precipitation.

    Computer model guidance from the NOAA National Blend of Models, not a forecast written by NWS forecasters. Expect changes this far out.

Forecast for 34.481, -118.632 from the NWS LOX office, updated 10/28/2026, 1:41 AM PT · Official forecast on weather.gov

Days 8 to 10: NOAA National Blend of Models, station KWHP (Los Angeles/Whiteman Arpt, 20 mi), model run 10/27/2026, 4:00 PM PDT

From the National Weather Service; may be delayed. Not for life-safety decisions. In an emergency, call 911.

Next 6 hours

NWS hourly forecast

  1. Now62°Patchy Fog0%0 mph
  2. 11 AM64°Mostly Sunny0%5 mph
  3. 12 PM67°Mostly Sunny0%5 mph
  4. 1 PM70°Mostly Sunny0%5 mph
  5. 2 PM71°Mostly Sunny0%10 mph
  6. 3 PM72°Mostly Sunny0%10 mph

Hourly details

Next 7 days: temperature chart, feels like, rain and snow amounts, sky cover, wind and gustsShow

Radar and satellite

National radar

NEXRAD (last 50 min) and GOES

Latest

Frequently asked questions

What is the high temperature today in Castaic, CA?
The National Weather Service forecast for today calls for a high near 72°F. Patchy Fog then Partly Sunny.
Will it rain in Castaic, CA in the next 24 hours?
The NWS hourly forecast does not show any hour with a 50% or higher chance of precipitation in the next 24 hours.
What is the 10-day forecast for Castaic, CA?
The first 7 days come from the National Weather Service forecast. Days 8 to 10 (Nov 4 to Nov 6) come from the NOAA National Blend of Models, with highs of 71°F to 74°F. Model guidance this far out often changes.
What time is sunrise and sunset in Castaic, CA today?
Sunrise is about 7:11 AM PDT and sunset is about 6:05 PM PDT (calculated for the center of the area, within a few minutes).
What is the normal October weather in Castaic, CA?
At Newhall 5nw, the 1991 to 2020 normal high in October is 81°F and the normal low is 56°F.

Nearby hazards

California hazards

Severe storm and flash flood outlooks, expected rain, river flooding and wildfires near this area

  • Severe storm outlook today:No thunderstorm risk area over this locationOutlook map
  • Excessive rainfall outlook (flash flood risk):Could not check the Weather Prediction Center outlook right now.
  • River gauges within 40 miles at or above flood stage: None reported
  • Active wildfires within 50 miles: BRYSON Fire (146 acres), COOPER Fire (0 acres), LAC-385891 Fire, ETHAN Fire, CACTUS Fire

UV and air quality forecast

EPA and AirNow

AQI forecast today (San Gabriel Mts)
55ModeratePM2.5
AQI forecast tomorrow (San Gabriel Mts)
53ModeratePM2.5

UV index guide · Air quality

Drought

By county

Los Angeles County, week of 10/20/2026

7% of the county is abnormally dry. No drought.

Sun and moon

Local time, center of the area

Sunrise
7:11 AM
Sunset
6:05 PM
Daylight
10 hr 54 min
Moon
Waning Gibbous 93% lit
First light (civil dawn)
6:45 AM
Last light (civil dusk)
6:30 PM
Moonrise
7:48 PM
Moonset
10:09 AM

Normal October weather

Climate

Normal October high 81°, low 56°, precipitation 0.52 in for the month. 1991 to 2020 normals at Newhall 5nw, 6 mi away.

Other places nearby

Data sources

See something wrong? Request a correction

About this data

Weather and emergencies: Weather, air quality and hazard information on this page is delayed and may be incomplete. It is not a substitute for official warnings. Always follow the National Weather Service, local emergency management and public safety officials. In an emergency, call 911. For evacuation orders, use your local official alert system.

Forecasts, observations and alerts come from the National Weather Service (api.weather.gov). Data can be delayed by minutes to hours, and an observation station may be miles from the place named on this page. This site is not affiliated with NOAA or the National Weather Service.

DatenUS is a private website and is not affiliated with or endorsed by any government agency. We republish public data from the sources listed on this page. Data can be incomplete, delayed or wrong. Always check the original source before you make a decision.

Our servers read this data automatically from government sources. Errors can come from the source itself or from the way we read, process or display it, and we do not guarantee that it is accurate, complete or current. Verify anything important with the official source.

Report an errorRead the full disclaimer