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