Lost Isle, CA Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Lost Isle Weather Forecast
| TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | THURSDAY | THURSDAY NIGHT |
| Clear | Sunny | Mostly Cloudy | Mostly Cloudy | Mostly Cloudy | Sunny | Clear | Clear | Clear | Clear | Clear | Mostly Clear |
| Lo: 57°FLo: 14°C | Hi: 90°FHi: 32°C | Lo: 58°FLo: 14°C | Hi: 84°FHi: 29°C | Lo: 57°FLo: 14°C | Hi: 86°FHi: 30°C | Lo: 57°FLo: 14°C | Hi: 89°FHi: 32°C Lo: 58°FLo: 14°C | Hi: 89°FHi: 32°C Lo: 58°FLo: 14°C | Hi: 96°FHi: 36°C Lo: 61°FLo: 16°C | Hi: 96°FHi: 36°C Lo: 61°FLo: 16°C | Hi: 95°FHi: 35°C Lo: 63°FLo: 17°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 800 PM PDT Fri Sep 18 2026 

Lost Isle Radar Loop
Use the map search tool if you want to place a location marker on the radar map...
Lost Isle Weather Map
Lost Isle Quick Facts
Lost Isle Forecast Discussion
Meteorlogic Glosserator
Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 1234 PM PDT Fri Sep 18 2026
Key Messages
- Seasonable temperatures and dry conditions persist over the weekend with generally offshore winds.
- Isolated mountain thunderstorm chances (up to 10%) along the Sierra from Highway 50 southward on Monday.
- Dry weather remainder of next week with gradual warming trend through the middle of the week.
Discussion
...
Today-Weekend: Upper level troughing is beginning to eject eastward as of early this afternoon and is expected to exit the region by Saturday. In its wake, a brief period of weak...
Weather World