Weather WorldCastac Lake, CA Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Castac Lake Weather Forecast
| TODAY | TONIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | THURSDAY | FRIDAY | FRIDAY NIGHT | SATURDAY |
 |  | | | | | | | |  | |
| Sunny | Clear | Sunny | Clear | Sunny | Mostly Clear | Mostly Clear | Mostly Clear | Mostly Clear | Partly Cloudy | Sunny |
| Hi: 84°FHi: 29°C | Lo: 61°FLo: 16°C | Hi: 84°FHi: 29°C | Lo: 56°FLo: 13°C | Hi: 78°FHi: 26°C | Hi: 78°FHi: 26°C Lo: 55°FLo: 13°C | Hi: 78°FHi: 26°C Lo: 55°FLo: 13°C | Hi: 78°FHi: 26°C Lo: 55°FLo: 13°C | Hi: 78°FHi: 26°C Lo: 55°FLo: 13°C | Lo: 59°FLo: 15°C | Hi: 82°FHi: 28°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 310 AM PDT Sun Aug 30 2026 
Castac Lake Radar Loop
Use the map search tool if you want to place a location marker on the radar map...
Castac Lake Weather Map
Castac Lake Quick Facts
Castac Lake Forecast Discussion
Meteorlogic Glosserator
Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 1030 PM PDT Sat Aug 29 2026
Key Messages
1. Temperatures will be normal to slightly below normal through the weekend before below average by the middle of next week.
2. Remaining moisture over the region bring a 5-15% chance of thunderstorms from the foothills to the Sierra Nevada Crest this afternoon.
3. Precipitation chances return again in the middle of next week.
Discussion
... Heat Dome shifting east as the district will now see afternoon highs in the 90s for several days. A broad Trough Pattern over the West Coast forcing...