Click on a day for an hourly weather forecast
The weather in Crestline in September is hot. The average temperatures are between 19°C and 32°C. Usually the days in September are hot while the nights are a bit cooler.
You can expect a few rainy days in Crestline 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 Crestline in September 2025.
If you’re planning to visit Crestline in the near future, we highly recommend that you review the 14 day weather forecast for Crestline before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 15° / 4° | 4 | 27 | 0 | 70 mm | Good | Crestline in January |
| February | 15° / 4° | 4 | 24 | 0 | 74 mm | Good | Crestline in February |
| March | 18° / 6° | 4 | 27 | 0 | 56 mm | Good | Crestline in March |
| April | 22° / 10° | 2 | 28 | 0 | 29 mm | Good | Crestline in April |
| May | 26° / 13° | 2 | 29 | 0 | 13 mm | Perfect | Crestline in May |
| June | 31° / 17° | 0 | 30 | 0 | 2 mm | Good | Crestline in June |
| July | 34° / 21° | 1 | 30 | 0 | 4 mm | Ok | Crestline in July |
| August | 34° / 22° | 1 | 30 | 0 | 3 mm | Ok | Crestline in August |
| September | 32° / 19° | 1 | 29 | 0 | 6 mm | Good | Crestline in September |
| October | 25° / 13° | 2 | 29 | 0 | 19 mm | Perfect | Crestline in October |
| November | 19° / 8° | 2 | 28 | 0 | 35 mm | Good | Crestline in November |
| December | 14° / 4° | 4 | 26 | 0 | 98 mm | Good | Crestline in December |