Click on a day for an hourly weather forecast
The weather in Brea in September is hot. The average temperatures are between 20°C and 28°C.
You can expect a few rainy days in Brea during September, but usually the weather is comfortable in September.
Our weather forecast can give you a great sense of what weather to expect in Brea in September 2025.
If you’re planning to visit Brea in the near future, we highly recommend that you review the 14 day weather forecast for Brea before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 20° / 11° | 3 | 28 | 0 | 70 mm | Good | Brea in January |
| February | 19° / 11° | 2 | 26 | 0 | 68 mm | Good | Brea in February |
| March | 20° / 11° | 2 | 29 | 0 | 44 mm | Good | Brea in March |
| April | 21° / 13° | 1 | 29 | 0 | 23 mm | Good | Brea in April |
| May | 22° / 14° | 1 | 30 | 0 | 15 mm | Good | Brea in May |
| June | 25° / 16° | 0 | 30 | 0 | 4 mm | Perfect | Brea in June |
| July | 27° / 19° | 1 | 30 | 0 | 25 mm | Perfect | Brea in July |
| August | 28° / 20° | 1 | 30 | 0 | 19 mm | Perfect | Brea in August |
| September | 28° / 20° | 1 | 29 | 0 | 15 mm | Perfect | Brea in September |
| October | 25° / 17° | 1 | 30 | 0 | 23 mm | Perfect | Brea in October |
| November | 22° / 14° | 1 | 29 | 0 | 31 mm | Good | Brea in November |
| December | 19° / 11° | 3 | 28 | 0 | 82 mm | Good | Brea in December |