Las Vegas, NV
Las Vegas Weather in September
These are climate averages, not a forecast.
What is the weather like in Las Vegas in September? Based on NOAA 1991–2020 normals at Harry Reid Intl Airport, Las Vegas averages a high of 94.9°F and a low of 72.4°F in September, with 0.32 inches of precipitation. September is 7.9°F cooler than August.
- Average high 94.9°F 34.9°C
- Average low 72.4°F 22.4°C
- Precipitation 0.32 in 1.8 days
- Snow 0.0 in
September Temperatures in Las Vegas
September's average high is 7.9°F cooler than August's.
October's average high is 13.7°F cooler.
The average temperature normal is 83.6°F (28.7°C).
Rain in Las Vegas in September
Precipitation of 0.32 inches is 0.03 inches below the monthly mean of 0.35 inches.
About 1.8 days have at least 0.01 inch of precipitation.
How September Compares to Other Months
September is the fourth-warmest month in Las Vegas and is tied for the fifth-driest month.
In Las Vegas, three months have a higher average high than September.
| Month | Avg high | Avg low | Precipitation | Days ≥ 0.01 in | Snow |
|---|---|---|---|---|---|
| Las Vegas weather in January | 58.5°F | 40.5°F | 0.56 in | 3.1 | 0.0 in |
| Las Vegas weather in February | 62.9°F | 44.1°F | 0.80 in | 4.1 | 0.0 in |
| Las Vegas weather in March | 71.1°F | 50.5°F | 0.42 in | 2.8 | 0.0 in |
| Las Vegas weather in April | 78.5°F | 56.9°F | 0.20 in | 1.6 | 0.0 in |
| Las Vegas weather in May | 88.5°F | 66.1°F | 0.07 in | 1.1 | 0.0 in |
| Las Vegas weather in June | 99.4°F | 75.8°F | 0.04 in | 0.4 | 0.0 in |
| Las Vegas weather in July | 104.5°F | 82.0°F | 0.38 in | 2.5 | 0.0 in |
| Las Vegas weather in August | 102.8°F | 80.6°F | 0.32 in | 2.2 | 0.0 in |
| Las Vegas weather in September | 94.9°F | 72.4°F | 0.32 in | 1.8 | 0.0 in |
| Las Vegas weather in October | 81.2°F | 59.6°F | 0.32 in | 1.7 | 0.0 in |
| Las Vegas weather in November | 67.1°F | 47.3°F | 0.30 in | 1.5 | 0.0 in |
| Las Vegas weather in December | 56.9°F | 39.6°F | 0.45 in | 3.0 | 0.2 in |
Is September a Good Time to Visit Las Vegas?
September does not meet the weather rule: the average high is 94.9°F, outside 65 to 85°F.
About This Data
Source: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991–2020. Station: Harry Reid Intl Airport (NOAA station: LAS VEGAS MCCARRAN AP) (USW00023169), 14.4 mi from downtown, elevation 2131 ft. Climate normals are 30-year averages, not forecasts. MonthSky is not affiliated with NOAA.
Palecki, Michael; Durre, Imke; Applequist, Scott; Arguez, Anthony; Lawrimore, Jay (2021). U.S. Climate Normals 2020: U.S. Monthly Climate Normals (1991-2020). NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/wck8-er13. Accessed 2026-10-21.
U.S. Government work.
NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose.
NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives.
These pages are built automatically from public NOAA data.
U.S. Monthly Climate Normals (1991-2020) dataset
NCEI dataset landing page for the monthly normals
FAQ
How hot is Las Vegas in September?
The average high is 94.9°F (34.9°C) and the average low is 72.4°F (22.4°C).
Does it rain a lot in Las Vegas in September?
September averages 0.32 inches, slightly below the monthly mean of 0.35 inches. That falls on about 1.8 days.
Is September a good time to visit Las Vegas?
By this page's weather rule, no. The rule keeps months with an average high from 65 to 85°F and precipitation below 0.35 inches.