Las Vegas weather in September
Temperature, sea and sunshine in September: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in September
Good
Best time to visit: March – April, October – November
What is the weather like in Las Vegas in September?
In September, Las Vegas is very hot: daytime highs average 33 °C, and even at night it stays warm at around 21 °C. With around 10 hours of sunshine a day, there is plenty of sun. It hardly ever rains. On about 25 days the thermometer climbs to 30 °C or more. All in all, September is a good month for a holiday in Las Vegas.
September compared
How the weather changes from August to October. Tap a month to open it.
| AugustAug | SeptemberSep | OctoberOct | |
|---|---|---|---|
| Score | 50 | 60 | 99 |
| Day | 38° | 33° | 26° |
| Night | 26° | 21° | 15° |
| Sun | 10 h | 10 h | 9 h |
| Rain days | 3 | 1 | 1 |
More details for September
- Daylight
- 12 h 28 min06:22 – 18:50
- UV index
- 8 · very highclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or more
- Wind
- 13 km/haverage daily peak
- Cloud cover
- 15 %on average
- Hot days
- 25 days30 °C or more
- Time zone
- UTC−7America/Los_Angeles
How the score comes together
- Temperatureweight 50 %20 %
- Sunshineweight 20 %100 %
- Few rainy daysweight 30 %100 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in September
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Water bottle – drink plenty
Las Vegas in September: quick answers
Is Las Vegas hot in September?
Yes. In September, Las Vegas is very hot: daytime highs average 33 °C and nights stay around 21 °C. On about 25 days the thermometer climbs to 30 °C or more.
Does it rain much in Las Vegas in September?
It hardly ever rains.
Las Vegas month by month
The whole year in Las VegasAll destinations: USAWhere to go in September
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0)