Weather WorldRoyal Arch Lake, CA Weather Forecast
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Royal Arch Lake Weather Forecast
| TODAY | TONIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY |
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| Sunny | Mostly Cloudy | Mostly Sunny | Mostly Cloudy | Sunny | Partly Cloudy | Mostly Clear | Mostly Clear | Partly Cloudy | Partly Sunny | Partly Cloudy | Sunny |
| Hi: 74°FHi: 23°C | Lo: 53°FLo: 12°C | Hi: 73°FHi: 23°C | Lo: 53°FLo: 12°C | Hi: 73°FHi: 23°C | Lo: 53°FLo: 12°C | Hi: 73°FHi: 23°C Lo: 52°FLo: 11°C | Hi: 73°FHi: 23°C Lo: 52°FLo: 11°C | Lo: 52°FLo: 11°C | Hi: 70°FHi: 21°C | Lo: 50°FLo: 10°C | Hi: 70°FHi: 21°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 1141 PM PDT Sun Aug 23 2026 
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Royal Arch Lake Forecast Discussion
Issued: 1114 PM PDT Sun Aug 23 2026
Key Messages
1. Triple digit heat continues for San Joaquin Valley and Mojave Desert. 50 to 60 percent for Major Heat Risk in the Southern San Joaquin Valley at the start of this week. Heat Advisory issued valid Monday through Wednesday
2. A 5 to 15 percent probability for extreme heat risk in the Mojave Desert toward the end of the week and starting September. Extreme Heat Warning issued valid Monday through Wednesday.
Discussion
...
Little change in the current synoptic pattern is expected as we en...