The climate in Las Vegas during September can be summarized as hot and very dry.
September is in the fall / autumn in Las Vegas and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a warm 34°C (94°F), whilst at night 19°C (65°F) is normal.
|Daytime temperature||34.2°C 93.5°F|
|Nightly temperature||18.5°C 65.2°F|
|Average temperature||26.3°C 79.3°F|
|Daily sunshine||12 hrs|
|Avg rainfall||10 mm 0.4 ins|
|Rainy days||2 days|
|Sea temperature||17.7°C 63.8°F|
|Windspeed||15.5kph 10 mph|
On average September is the 3rd wettest month of the year in Las Vegas with around 10mm 0.4 inches of rain making it a very dry time to visit.
On the flip side this corresponds to an average of 12 hours of sunshine per day.
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in September 2019.
|Hottest month:||July||39.8°C 103.6°F|
|Driest month:||June||2mm 0.1ins|
|Coldest month:||December||13.2°C 55.8°F|
|Wettest month:||November||13mm 0.5ins|