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City of San Joaquin, CASan Joaquin, CA Weather Forecast
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San Joaquin Weather Forecast
| TODAY | TONIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | FRIDAY | SATURDAY |
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| Sunny | Mostly Clear | Sunny | Mostly Clear | Sunny | Clear | Clear | Mostly Clear | Mostly Clear | Mostly Clear | Mostly Clear |
| Hi: 85°FHi: 29°C | Lo: 51°FLo: 11°C | Hi: 81°FHi: 27°C | Lo: 55°FLo: 13°C | Hi: 85°FHi: 29°C | Hi: 91°FHi: 33°C Lo: 55°FLo: 13°C | Hi: 91°FHi: 33°C Lo: 55°FLo: 13°C | Hi: 95°FHi: 35°C Lo: 59°FLo: 15°C | Hi: 95°FHi: 35°C Lo: 59°FLo: 15°C | Hi: 95°FHi: 35°C Lo: 59°FLo: 15°C | Hi: 95°FHi: 35°C Lo: 59°FLo: 15°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 310 AM PDT Sun Sep 27 2026 
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Issued: 945 PM PDT Sat Sep 26 2026
Key Messages
1. Minor Heat Risk through the weekend into Monday as temperatures cool to early fall normals. Temperatures climb beginning Tuesday.
2. Low pressure trough approaches California Sunday, bringing cooler temperatures and a possibility for precipitation along the Sierra Nevada mountains.
3. Low but notable chances (10-20%) for thunderstorms across the Sierra Nevada Monday.
4. Lake Wind Advisories for Lake Isabella and San Luis Reservoir through late this evening.
Discussion
... A rather stro...