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Rainbow Lake Weather Forecast
| TONIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY |
 |  | |  |  |  | | |  | | |  |
| Clear | Chance of Showers | Mostly Clear | Mostly Sunny | Partly Cloudy | Partly Cloudy | Partly Cloudy | Partly Cloudy | Chance of Showers | Chance of Showers | Mostly Clear | Chance of Showers |
| Lo: 55°FLo: 13°C | Lo: 50°FLo: 10°C | Lo: 49°FLo: 9°C | |||||||||
| POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1237 PM PDT Wed Sep 23 2026 
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Issued: 131 PM PDT Wed Sep 23 2026
Discussion
...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE... SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO COUNTIES...
Temperatures at 1 PM were running 10 to 18 degrees warmer than yesterday in the Inland Empire, 5 to 7 degrees warmer than yesterday for other inland locations, and were within a few degrees of yesterday for the coast. Most locations will see an increase in temperatures each day through Saturday, with high temperatures 5 to 7 degrees above average for inlan...