Click on a day for an hourly weather forecast
The weather in Long Beach in September is hot. The average temperatures are between 20°C and 27°C.
As it is almost never rain during September in Long Beach the weather is perfect for hanging out outside and exploring all that Long Beach has to offer.
Our weather forecast can give you a great sense of what weather to expect in Long Beach in September 2025.
If you’re planning to visit Long Beach in the near future, we highly recommend that you review the 14 day weather forecast for Long Beach before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 20° / 12° | 2 | 29 | 0 | 26 mm | Good | Long Beach in January |
| February | 19° / 12° | 2 | 27 | 0 | 24 mm | Good | Long Beach in February |
| March | 20° / 13° | 1 | 30 | 0 | 15 mm | Good | Long Beach in March |
| April | 21° / 14° | 0 | 30 | 0 | 7 mm | Good | Long Beach in April |
| May | 21° / 15° | 0 | 31 | 0 | 4 mm | Good | Long Beach in May |
| June | 23° / 17° | 0 | 30 | 0 | 2 mm | Perfect | Long Beach in June |
| July | 26° / 19° | 0 | 31 | 0 | 8 mm | Perfect | Long Beach in July |
| August | 27° / 20° | 0 | 31 | 0 | 6 mm | Perfect | Long Beach in August |
| September | 27° / 20° | 0 | 30 | 0 | 6 mm | Perfect | Long Beach in September |
| October | 25° / 18° | 1 | 30 | 0 | 9 mm | Perfect | Long Beach in October |
| November | 22° / 15° | 1 | 29 | 0 | 11 mm | Good | Long Beach in November |
| December | 19° / 12° | 2 | 29 | 0 | 28 mm | Good | Long Beach in December |