Castaic, CA Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Castaic Weather Forecast
| TONIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY |
| Mostly Clear | Sunny | Clear | Sunny | Clear | Sunny | Clear | Sunny | Mostly Clear | Sunny | Mostly Clear | Sunny |
| Lo: 50°FLo: 10°C | Hi: 81°FHi: 27°C | Lo: 56°FLo: 13°C | Hi: 93°FHi: 34°C | Lo: 65°FLo: 18°C | Hi: 90°FHi: 32°C | Lo: 63°FLo: 17°C | Hi: 90°FHi: 32°C | Lo: 65°FLo: 18°C | Hi: 86°FHi: 30°C | Lo: 60°FLo: 16°C | Hi: 81°FHi: 27°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 1129 PM PDT Mon Sep 21 2026 

Castaic Radar Loop
Use the map search tool if you want to place a location marker on the radar map...
Castaic Weather Map
Castaic Quick Facts
Castaic Forecast Discussion
Meteorlogic Glosserator
Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 1108 PM PDT Mon Sep 21 2026
Aviation
...22/0603Z.
At 0508Z at KLAX, the marine layer was 3500 ft deep. The top of the inversion was at 4500 feet with a temperature of 15 C.
High confidence in VFR conds for KPMD & KWJF.
Good confidence in TAFs for KSBP and KSMX with VFR transition to occur with in an hour of fcst time.
Good confidence in TAFs for KSBA, KBUR and KVNY with a 15 percent chc of MVFR cigs 12Z-17Z.
Fair confidence in TAFs for KOXR and KCMA with a 25 percent chc of MVFR cigs 11Z-17Z.
Moderate confidence in TAFs for KSMO,...
Weather World