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Porterville Fairgrounds Weather Forecast
| TODAY | TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | WEDNESDAY | THURSDAY |
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| Chance of Rain | Partly Cloudy | Sunny | Clear | Sunny | Clear | Clear | Mostly Clear | Mostly Clear | Partly Cloudy | Partly Cloudy |
| Hi: 95°FHi: 35°C | Lo: 65°FLo: 18°C | Hi: 95°FHi: 35°C | Lo: 61°FLo: 16°C | Hi: 91°FHi: 33°C | Hi: 91°FHi: 33°C Lo: 60°FLo: 16°C | Hi: 91°FHi: 33°C Lo: 60°FLo: 16°C | Hi: 85°FHi: 29°C Lo: 59°FLo: 15°C | Hi: 85°FHi: 29°C Lo: 59°FLo: 15°C | Hi: 89°FHi: 32°C Lo: 59°FLo: 15°C | Hi: 89°FHi: 32°C Lo: 59°FLo: 15°C |
| POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 310 AM PDT Fri Aug 28 2026 
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Issued: 1118 PM PDT Thu Aug 27 2026
Key Messages
1 Temperatures continue to be lower Friday into next week.
2. Moisture tracking over the region brings a 10 to 4 percent chance of thunderstorms over the Sierra Nevada on Friday. 10 to 25 percent chance of precipitation Friday in the Valley.
3. Precipitation chances return middle of next week.
Discussion
... High clouds moved in quicker on Thursday leading to high temperatures to be significantly cooler than average. However, the southern portion of the Valley remains at a 40 to 75 perce...