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Lake Mathews, CA Weather Forecast
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Lake Mathews Weather Forecast
| TODAY | TONIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT |
 |  | | | | | | |  | |  |  |
| Mostly Sunny | Clear | Mostly Sunny | Mostly Clear | Sunny | Clear | Mostly Sunny | Mostly Clear | Partly Cloudy | Mostly Clear | Chance of Showers | Chance of Showers |
| Hi: 101°FHi: 38°C | Lo: 70°FLo: 21°C | Hi: 100°FHi: 38°C | Lo: 69°FLo: 21°C | Hi: 100°FHi: 38°C | Lo: 68°FLo: 20°C | Hi: 96°FHi: 36°C | Lo: 66°FLo: 19°C | Hi: 89°FHi: 32°C | Lo: 61°FLo: 16°C | Hi: 81°FHi: 27°C | Lo: 56°FLo: 13°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 137 AM PDT Tue Oct 06 2026 
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Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 438 AM PDT Tue Oct 6 2026
Discussion
...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE... SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO COUNTIES...
...UPDATED AVIATION DISCUSSION...
.SHORT TERM (Today through Thursday)... Widespread Major to Extreme HeatRisk for the coast and valleys for today will decrease to Moderate to Major HeatRisk on Thursday. High temperatures on Thursday will still be 12 to 18 degrees above average for the coast and valleys and 10 to 15 degrees above average for the mountains a...