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The weather in Las Vegas in September is very hot. The average temperatures are between 24°C and 34°C, drinking water regularly is advisable.
There shouldn't be any rainy days in in Las Vegas during September. Having said that, the days are very hot in September so hanging out outside is more recomanded during the after noons and evening time.
Our weather forecast can give you a great sense of what weather to expect in Las Vegas in September 2025.
If you’re planning to visit Las Vegas in the near future, we highly recommend that you review the 14 day weather forecast for Las Vegas before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 12° / 4° | 2 | 29 | 0 | 25 mm | Ok | Las Vegas in January |
| February | 14° / 6° | 1 | 27 | 0 | 26 mm | Good | Las Vegas in February |
| March | 19° / 11° | 1 | 30 | 0 | 16 mm | Good | Las Vegas in March |
| April | 24° / 15° | 1 | 29 | 0 | 7 mm | Perfect | Las Vegas in April |
| May | 30° / 19° | 1 | 30 | 0 | 8 mm | Good | Las Vegas in May |
| June | 37° / 25° | 0 | 30 | 0 | 2 mm | Ok | Las Vegas in June |
| July | 39° / 28° | 1 | 30 | 0 | 17 mm | Bad | Las Vegas in July |
| August | 38° / 28° | 0 | 31 | 0 | 16 mm | Bad | Las Vegas in August |
| September | 34° / 24° | 0 | 30 | 0 | 6 mm | Ok | Las Vegas in September |
| October | 25° / 16° | 1 | 30 | 0 | 11 mm | Perfect | Las Vegas in October |
| November | 17° / 9° | 0 | 30 | 0 | 11 mm | Good | Las Vegas in November |
| December | 11° / 4° | 1 | 30 | 0 | 26 mm | Ok | Las Vegas in December |