Weather WorldSan Bernardino County Fairgrounds, CA Weather Forecast
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San Bernardino County Fairgrounds Weather Forecast
| TONIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY |
 |  |  |  | | | | | | | |  |
| Partly Cloudy | Partly Cloudy | Mostly Clear | Mostly Sunny | Mostly Clear | Partly Cloudy | Mostly Clear | Mostly Sunny | Mostly Clear | Mostly Sunny | Mostly Clear | Chance of T-Storm |
| Lo: 68°FLo: 20°C | Hi: 98°FHi: 37°C | Lo: 70°FLo: 21°C | Hi: 100°FHi: 38°C | Lo: 71°FLo: 22°C | Hi: 102°FHi: 39°C | Lo: 71°FLo: 22°C | Hi: 104°FHi: 40°C | Lo: 71°FLo: 22°C | Hi: 104°FHi: 40°C | Lo: 72°FLo: 22°C | Hi: 103°FHi: 39°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 1133 AM PDT Sat Aug 15 2026 
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San Bernardino County Fairgrounds Forecast Discussion
Issued: 1225 PM PDT Sat Aug 15 2026
Discussion
...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE... SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO COUNTIES...
A trough is draped across the State, leading to temperatures slightly below normal today. This pattern of greater onshore flow and cooler weather also allowed for a deeper marine layer that covered inland valleys of Orange and San Diego Counties earlier this morning. We`ll give the monsoon another try later this afternoon as s...