Click on a day for an hourly weather forecast
The weather in Joshua Tree in September is hot. The average temperatures are between 21°C and 32°C.
You can expect a few rainy days in Joshua Tree 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 Joshua Tree in September 2025.
If you’re planning to visit Joshua Tree in the near future, we highly recommend that you review the 14 day weather forecast for Joshua Tree before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 14° / 5° | 2 | 29 | 0 | 19 mm | Good | Joshua Tree in January |
| February | 16° / 6° | 2 | 27 | 0 | 14 mm | Good | Joshua Tree in February |
| March | 19° / 8° | 1 | 30 | 0 | 7 mm | Good | Joshua Tree in March |
| April | 24° / 12° | 1 | 29 | 0 | 5 mm | Perfect | Joshua Tree in April |
| May | 27° / 15° | 0 | 31 | 0 | 1 mm | Perfect | Joshua Tree in May |
| June | 33° / 20° | 0 | 30 | 0 | 1 mm | Good | Joshua Tree in June |
| July | 36° / 24° | 3 | 28 | 0 | 11 mm | Ok | Joshua Tree in July |
| August | 35° / 24° | 2 | 29 | 0 | 9 mm | Ok | Joshua Tree in August |
| September | 32° / 21° | 1 | 29 | 0 | 5 mm | Good | Joshua Tree in September |
| October | 25° / 14° | 1 | 30 | 0 | 7 mm | Perfect | Joshua Tree in October |
| November | 19° / 9° | 1 | 29 | 0 | 6 mm | Good | Joshua Tree in November |
| December | 13° / 5° | 2 | 29 | 0 | 26 mm | Ok | Joshua Tree in December |