Weather World
Arnold Reservoir, CA Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Arnold Reservoir Weather Forecast
| TODAY | TONIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT |
 |  | | | | |  |  |  |  | | |
| Mostly Sunny | Mostly Clear | Mostly Sunny | Mostly Clear | Mostly Sunny | Mostly Clear | Partly Cloudy | Chance of Showers | Chance of Showers | Partly Cloudy | Partly Cloudy | Partly Cloudy |
| Hi: 100°FHi: 38°C | Lo: 68°FLo: 20°C | Hi: 96°FHi: 36°C | Lo: 64°FLo: 18°C | Hi: 92°FHi: 33°C | Lo: 62°FLo: 17°C | Hi: 90°FHi: 32°C | Lo: 64°FLo: 18°C | Hi: 90°FHi: 32°C | Lo: 66°FLo: 19°C | Hi: 94°FHi: 34°C | Lo: 67°FLo: 19°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 1218 AM PDT Sat Aug 29 2026 
Arnold Reservoir Radar Loop
Use the map search tool if you want to place a location marker on the radar map...
Arnold Reservoir Weather Map
Arnold Reservoir Quick Facts
Arnold Reservoir Forecast Discussion
Meteorlogic Glosserator
Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 231 AM PDT Sat Aug 29 2026
Discussion
...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE... SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO COUNTIES...
...UPDATED AVIATION DISCUSSION...
Patchy low clouds have developed along the coast again this morning with just a few high clouds elsewhere. Low clouds and patchy fog are forecast to spread northward along the coast and a few miles inland through sunrise, clearing by mid-morning. Today will be the last day of the heat wave with temperatures a few degrees lo...