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Castleview Park Weather Forecast
| TODAY | TONIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT |
 | | |  |  | | | | | |  | |
| Patchy Fog | Patchy Fog | Patchy Fog | Clear | Mostly Sunny | Clear | Mostly Sunny | Mostly Clear | Mostly Sunny | Mostly Clear | Partly Cloudy | Mostly Clear |
| Hi: 81°FHi: 27°C | Lo: 57°FLo: 14°C | Hi: 86°FHi: 30°C | Lo: 61°FLo: 16°C | Hi: 92°FHi: 33°C | Lo: 66°FLo: 19°C | Hi: 94°FHi: 34°C | Lo: 66°FLo: 19°C | Hi: 93°FHi: 34°C | Lo: 65°FLo: 18°C | Hi: 97°FHi: 36°C | Lo: 63°FLo: 17°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 1222 AM PDT Mon Sep 21 2026 
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Issued: 456 AM PDT Mon Sep 21 2026
Discussion
...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE... SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO COUNTIES...
...UPDATED AVIATION DISCUSSION...
.SHORT TERM (Today through Wednesday)... A weak upper level low pressure system will move inland through central and southern California today with high temperatures a few to around 5 degrees cooler than Sunday and as much as 5 to 10 degrees below average for the valleys. High temperatures for today will range from the lowe...