Click on a day for an hourly weather forecast
The weather in Chino Hills in September is hot. The average temperatures are between 21°C and 31°C.
There shouldn't be any rainy days in in Chino Hills 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 Chino Hills in September 2025.
If you’re planning to visit Chino Hills in the near future, we highly recommend that you review the 14 day weather forecast for Chino Hills before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 20° / 10° | 2 | 29 | 0 | 62 mm | Good | Chino Hills in January |
| February | 20° / 10° | 2 | 26 | 0 | 67 mm | Good | Chino Hills in February |
| March | 21° / 11° | 2 | 29 | 0 | 39 mm | Good | Chino Hills in March |
| April | 23° / 13° | 1 | 29 | 0 | 22 mm | Perfect | Chino Hills in April |
| May | 24° / 15° | 1 | 30 | 0 | 10 mm | Perfect | Chino Hills in May |
| June | 27° / 18° | 0 | 30 | 0 | 2 mm | Perfect | Chino Hills in June |
| July | 30° / 21° | 1 | 30 | 0 | 13 mm | Good | Chino Hills in July |
| August | 31° / 22° | 0 | 31 | 0 | 9 mm | Good | Chino Hills in August |
| September | 31° / 21° | 0 | 30 | 0 | 7 mm | Good | Chino Hills in September |
| October | 27° / 18° | 1 | 30 | 0 | 13 mm | Perfect | Chino Hills in October |
| November | 23° / 13° | 1 | 29 | 0 | 25 mm | Perfect | Chino Hills in November |
| December | 18° / 10° | 3 | 28 | 0 | 79 mm | Good | Chino Hills in December |