How warm is it in Las Vegas in August?

Daytime highs averaged 40.7 °C, night-time lows 25.8 °C. The highest value of the past 10 years was 47.1 °C (1 Aug 2026), the lowest 18.7 °C (25 Aug 2024).

How often does it rain in Las Vegas in August?

On average there were 3.6 rain days (at least 1 mm) with 15.3 mm of precipitation in total.

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Las Vegas weather in August: temperature & rain

Photo: Dietmar Rabich · CC BY-SA 4.0

🇺🇸 Weather in Las Vegas in August

This is what the weather in Las Vegas (Nevada, USA) was like in August over the years 2017–2026.

Key facts at a glance

Prevailing weather: Sunny

Avg. daytime high

40.7 °C

38.5 °C – 42.6 °C

Avg. night-time low

25.8 °C

24.6 °C – 27.7 °C

Avg. rain days in period

3.6

12 % of days · ≥ 1.0 mm

Avg. precipitation in period

15.3 mm

2.6 mm – 50.9 mm

Avg. cloud cover

37 %

This data source has no sunshine hours – average cloud cover is shown instead.

Avg. sea temperature

–

No sea nearby – no sea temperature.

Extremes: Highest temperature 47.1 °C (1 Aug 2026) · Lowest temperature 18.7 °C (25 Aug 2024) · Avg. daily peak wind 20 km/h

Weather mix of all days

121Sunny
104Partly cloudy
22Cloudy
27Light rain
9Rain

Summary

On average 40.7 °C during the day and 25.8 °C at night.
On average 3.6 rain days (Rain day = at least 1.0 mm of precipitation) with 15.3 mm of precipitation in total.
Prevailing weather: Sunny.
Warmest year: 2026 (avg. 42.6 °C), coolest: 2022 (avg. 38.5 °C).
Wettest year: 2023 (50.9 mm), driest: 2019 (2.6 mm).
Extremes: 47.1 °C on 1 Aug 2026 and 18.7 °C on 25 Aug 2024.

Overall values from all 10 years. How is this calculated?

Temperatures per year

Average over your travel period

Precipitation & rain days

Year by year

2026
Avg. max42.6°Avg. min27.7°
Rain days
4 Rain days
Precipitation
18.3 mm
Avg. cloud cover
–
Sea temperature
–
Max 47.1 °C · Min 21.2 °C
2025
Avg. max41.4°Avg. min25.5°
Rain days
2 Rain days
Precipitation
5.3 mm
Avg. cloud cover
46 % cloudy
Sea temperature
–
Max 45.3 °C · Min 21.5 °C
2024
Avg. max41.0°Avg. min26.1°
Rain days
1 Rain days
Precipitation
3.8 mm
Avg. cloud cover
38 % cloudy
Sea temperature
–
Max 46.1 °C · Min 18.7 °C
2023
Avg. max38.9°Avg. min24.6°
Rain days
7 Rain days
Precipitation
50.9 mm
Avg. cloud cover
47 % cloudy
Sea temperature
–
Max 43.0 °C · Min 18.7 °C
2022
Avg. max38.5°Avg. min25.9°
Rain days
8 Rain days
Precipitation
28.2 mm
Avg. cloud cover
59 % cloudy
Sea temperature
–
Max 43.7 °C · Min 23.2 °C
2021
Avg. max40.8°Avg. min25.7°
Rain days
2 Rain days
Precipitation
7.1 mm
Avg. cloud cover
38 % cloudy
Sea temperature
–
Max 45.2 °C · Min 21.2 °C
2020
Avg. max42.5°Avg. min26.3°
Rain days
1 Rain days
Precipitation
3.6 mm
Avg. cloud cover
33 % cloudy
Sea temperature
–
Max 45.6 °C · Min 21.6 °C
2019
Avg. max41.6°Avg. min25.1°
Rain days
1 Rain days
Precipitation
2.6 mm
Avg. cloud cover
19 % cloudy
Sea temperature
–
Max 44.9 °C · Min 20.6 °C
2018
Avg. max40.5°Avg. min25.8°
Rain days
5 Rain days
Precipitation
16.5 mm
Avg. cloud cover
24 % cloudy
Sea temperature
–
Max 44.1 °C · Min 20.8 °C
2017
Avg. max39.1°Avg. min25.7°
Rain days
5 Rain days
Precipitation
17.0 mm
Avg. cloud cover
34 % cloudy
Sea temperature
–
Max 42.6 °C · Min 22.1 °C

Frequently asked questions

How warm is it in Las Vegas in August?: Daytime highs averaged 40.7 °C, night-time lows 25.8 °C. The highest value of the past 10 years was 47.1 °C (1 Aug 2026), the lowest 18.7 °C (25 Aug 2024).
How often does it rain in Las Vegas in August?: On average there were 3.6 rain days (at least 1 mm) with 15.3 mm of precipitation in total.

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Data sources

Weather data: Data obtained from the NASA Langley Research Center (LaRC) POWER Project funded through the NASA Earth Science/Applied Science Program
Reanalysis (weather model constrained by observations) on a coarse grid of about 50 km. Values represent a large area and can differ from local conditions, especially on islands, coasts and in mountains. Snow depth is the model value for the grid cell, not the depth on the slopes. No sunshine duration.
Reanalysis (weather model constrained by observations)
Reanalysis values represent a grid cell (approx. 25–50 km) and may differ from local measurements on coasts, islands and in mountains.
Sea temperature: MUR SST data were provided by JPL under support by NASA MEaSUREs program; accessed via NOAA CoastWatch ERDDAP
Daily multi-scale ultra-high resolution (≈ 1 km) analysis of satellite measurements (infrared, microwave) and in-situ data. Represents the foundation temperature below the daily warm surface layer. (Satellite and in-situ analysis)
Place search: Natural Earth (public domain) · GeoNames (CC BY 4.0) / OpenStreetMap (ODbL)