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The weather in Temecula in September is hot. The average temperatures are between 18°C and 30°C. Usually the days in September are hot while the nights are a bit cooler.
You can expect a few rainy days in Temecula 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 Temecula in September 2025.
If you’re planning to visit Temecula in the near future, we highly recommend that you review the 14 day weather forecast for Temecula before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 19° / 8° | 2 | 29 | 0 | 42 mm | Good | Temecula in January |
| February | 18° / 8° | 2 | 26 | 0 | 45 mm | Good | Temecula in February |
| March | 20° / 8° | 2 | 29 | 0 | 27 mm | Good | Temecula in March |
| April | 22° / 9° | 1 | 29 | 0 | 13 mm | Good | Temecula in April |
| May | 23° / 11° | 0 | 31 | 0 | 10 mm | Perfect | Temecula in May |
| June | 27° / 14° | 0 | 30 | 0 | 2 mm | Perfect | Temecula in June |
| July | 30° / 17° | 1 | 30 | 0 | 22 mm | Good | Temecula in July |
| August | 31° / 18° | 1 | 30 | 0 | 15 mm | Good | Temecula in August |
| September | 30° / 18° | 1 | 29 | 0 | 11 mm | Good | Temecula in September |
| October | 26° / 14° | 1 | 30 | 0 | 10 mm | Perfect | Temecula in October |
| November | 22° / 11° | 1 | 29 | 0 | 25 mm | Good | Temecula in November |
| December | 17° / 7° | 3 | 28 | 0 | 40 mm | Good | Temecula in December |