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The weather in Porterville in September is hot. The average temperatures are between 17°C and 34°C. Usually the days in September are hot while the nights are a bit cooler.
There shouldn't be any rainy days in in Porterville during September. Having said that, the days are very hot in September so hanging out outside is more recomanded during the after noons and evening time.
Our weather forecast can give you a great sense of what weather to expect in Porterville in September 2025.
If you’re planning to visit Porterville in the near future, we highly recommend that you review the 14 day weather forecast for Porterville before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 16° / 6° | 4 | 27 | 0 | 76 mm | Good | Porterville in January |
| February | 17° / 6° | 3 | 25 | 0 | 65 mm | Good | Porterville in February |
| March | 19° / 7° | 3 | 28 | 0 | 77 mm | Good | Porterville in March |
| April | 23° / 9° | 2 | 28 | 0 | 35 mm | Perfect | Porterville in April |
| May | 27° / 12° | 1 | 30 | 0 | 14 mm | Perfect | Porterville in May |
| June | 34° / 16° | 0 | 30 | 0 | 2 mm | Ok | Porterville in June |
| July | 38° / 19° | 0 | 31 | 0 | 5 mm | Bad | Porterville in July |
| August | 37° / 19° | 0 | 31 | 0 | 3 mm | Ok | Porterville in August |
| September | 34° / 17° | 0 | 30 | 0 | 4 mm | Ok | Porterville in September |
| October | 27° / 13° | 1 | 30 | 0 | 21 mm | Perfect | Porterville in October |
| November | 20° / 9° | 2 | 28 | 0 | 36 mm | Good | Porterville in November |
| December | 15° / 5° | 3 | 27 | 0 | 79 mm | Good | Porterville in December |