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The weather in Whittier in September is hot. The average temperatures are between 21°C and 31°C.
There shouldn't be any rainy days in in Whittier 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 Whittier in September 2025.
If you’re planning to visit Whittier in the near future, we highly recommend that you review the 14 day weather forecast for Whittier before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 21° / 11° | 3 | 28 | 0 | 50 mm | Good | Whittier in January |
| February | 20° / 11° | 2 | 27 | 0 | 51 mm | Good | Whittier in February |
| March | 22° / 12° | 2 | 30 | 0 | 26 mm | Good | Whittier in March |
| April | 24° / 13° | 1 | 29 | 0 | 14 mm | Perfect | Whittier in April |
| May | 25° / 15° | 0 | 31 | 0 | 4 mm | Perfect | Whittier in May |
| June | 27° / 17° | 0 | 30 | 0 | 1 mm | Perfect | Whittier in June |
| July | 30° / 20° | 0 | 31 | 0 | 6 mm | Good | Whittier in July |
| August | 31° / 21° | 0 | 31 | 0 | 4 mm | Good | Whittier in August |
| September | 31° / 21° | 0 | 30 | 0 | 5 mm | Good | Whittier in September |
| October | 27° / 18° | 1 | 30 | 0 | 9 mm | Perfect | Whittier in October |
| November | 24° / 14° | 1 | 29 | 0 | 20 mm | Perfect | Whittier in November |
| December | 20° / 11° | 2 | 29 | 0 | 54 mm | Good | Whittier in December |