Weather World
Lyon, CA Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Lyon Weather Forecast
| TONIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY |
 |  | | | |  | | | | |  |  |
| Clear | Mostly Sunny | Clear | Mostly Sunny | Mostly Clear | Partly Cloudy | Mostly Clear | Partly Cloudy | Mostly Clear | Partly Cloudy | Chance of Showers | Chance of Showers |
| Lo: 74°FLo: 23°C | Hi: 99°FHi: 37°C | Lo: 72°FLo: 22°C | Hi: 99°FHi: 37°C | Lo: 70°FLo: 21°C | Hi: 96°FHi: 36°C | Lo: 69°FLo: 21°C | Hi: 90°FHi: 32°C | Lo: 68°FLo: 20°C | Hi: 88°FHi: 31°C | Lo: 65°FLo: 18°C | Hi: 81°FHi: 27°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 1131 AM PDT Mon Oct 05 2026 
Lyon Radar Loop
Use the map search tool if you want to place a location marker on the radar map...
Lyon Weather Map
Lyon Quick Facts
Lyon Forecast Discussion
Meteorlogic Glosserator
Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 1132 AM PDT Mon Oct 5 2026
Discussion
...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE... SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO COUNTIES...
Another hot day is in store as high pressure remains over the Southwest. Valley and coastal locations soaring into the 90s again this morning as weak offshore winds hold across the area. Models show better onshore flow (west winds) closer to the coast and far western valleys over the next couple of days. Still thinking temperatures from today into Tuesday ...