Weather WorldSan Juan Trail, CA Weather Forecast
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San Juan Trail Weather Forecast
| TODAY | TONIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT |
 |  | | | | | | | | | | |
| Mostly Sunny | Mostly Clear | Mostly Sunny | Mostly Clear | Mostly Sunny | Mostly Clear | Mostly Sunny | Mostly Clear | Mostly Sunny | Mostly Clear | Mostly Sunny | Mostly Clear |
| Hi: 97°FHi: 36°C | Lo: 69°FLo: 21°C | Hi: 95°FHi: 35°C | Lo: 69°FLo: 21°C | Hi: 95°FHi: 35°C | Lo: 69°FLo: 21°C | Hi: 95°FHi: 35°C | Lo: 69°FLo: 21°C | Hi: 95°FHi: 35°C | Lo: 69°FLo: 21°C | Hi: 95°FHi: 35°C | Lo: 69°FLo: 21°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 1252 AM PDT Wed Aug 19 2026 
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San Juan Trail Forecast Discussion
Issued: 426 AM PDT Wed Aug 19 2026
Discussion
...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE... SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO COUNTIES...
...UPDATED AVIATION DISCUSSION...
.SHORT TERM (Today through Friday)... For the coast and valleys, high temperatures will warm a few degrees today and cool a few degrees on Thursday with not much change on Friday. For the mountains and deserts, there will be slight day to day differences through Friday.
High temperatures for tod...