Las Vegas weather in September 2026

Q: How hot is it in Las Vegas in September?

Daytime temperatures usually reach 35°C in Las Vegas in September with high heat and humidity, falling to 19°C at night.

Q: How sunny is it in Las Vegas in September?

There are normally 11 hours of bright sunshine each day in Las Vegas in September - that's 90% of daylight hours.

Q: Does it ever rain in Las Vegas in September?

There are usually 2 days with some rain in Las Vegas in September and the average monthly rainfall is 9mm.

Expect daytime maximum temperatures of 35°C in Las Vegas, Nevada in September and high heat and humidity based on long-term weather averages. There are 11 hours of sunshine per day on average.

35
35°C max day temperature
11
11 hours of sunshine per day
2
2 days with some rainfall
19
19°C min night temperature
12
12 hours of daylight per day
H
High heat & humidity
9
9 mm of monthly rainfall
8
8 (Very High) UV index

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The September weather guide for Nevada (Las Vegas) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm) | Imperial (°F / inches)

More about Las Vegas

How hot is it in Las Vegas in September?

Daytime temperatures usually reach 35°C in Las Vegas in September with high heat and humidity, falling to 19°C at night.

How sunny is it in Las Vegas in September?

There are normally 11 hours of bright sunshine each day in Las Vegas in September - that's 90% of daylight hours.

Does it ever rain in Las Vegas in September?

There are usually 2 days with some rain in Las Vegas in September and the average monthly rainfall is 9mm.

Las Vegas September sunrise & sunset times

Browse the sunrise and sunset times for Las Vegas in September 2026. Select a month to view Las Vegas sunrise and sunset times for the next 12 months.

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