Monthly climate ·Las Vegas weather in September
In September, Las Vegas averages around 35° by day and 22° at night, with 1 rain days a month — about a 4% chance of rain on any given day.
By day
35°C
At night
22°C
Daily rain chance
4%
Rain days a month
1
Monthly precipitation
9 mm
Sunshine hours a day
11.5
Average of 2016–2025 (Open-Meteo archive). Typical climate — not a forecast.
Is September a good time to visit Las Vegas?
September is very hot in Las Vegas — around 35° by day on average. Great if you love heat; plan activities for mornings and evenings.
Every month in Las Vegas
Frequently asked questions
- What is the weather in Las Vegas in September?
- In September, temperatures in Las Vegas average between 22° at night and 35° by day, with 1 rain days a month (average of 2016–2025).
- How much rain falls in Las Vegas in September?
- Las Vegas gets about 9 mm of rain in September on average, spread over roughly 1 rain days.
- Is September a good time to visit Las Vegas?
- September is very hot in Las Vegas — around 35° by day on average. Great if you love heat; plan activities for mornings and evenings.