Las Vegas weather in August: Las Vegas, Nevada: normal highs, lows, rain and records for August
Las Vegas in August has a normal high of 103°F and a normal low of 81°F, a daily mean of 92°F, falling from 104°F on the 1st to 100°F by the 31st. Measurable precipitation falls on 2 days in a normal August, 0.32 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 39°C and low of 27°C, 8 mm of precipitation in August.
- NOAA stationHarry Reid International Airport
- Station IDUSW00023169
- Location36.07°N 115.16°W
- Elevation2,131 ft (650 m)
- From the center12 miles
- Population678,922
- Jan 59° 41°
- Feb 63° 44°
- Mar 71° 51°
- Apr 79° 57°
- May 89° 66°
- Jun 99° 76°
- Jul 105° 82°
- Aug 103° 81°
- Sep 95° 72°
- Oct 81° 60°
- Nov 67° 47°
- Dec 57° 40°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Las Vegas in August?
The normal high is 103°F and the normal low 81°F, for a daily mean of 91.7°F. August is 1.5°F cooler than July and 8.1°F warmer than September. August is the 2nd warmest month of the year in Las Vegas and the 6th wettest. Across the month the normal high falls 4°F, from 104°F on August 1 to 100°F on August 31. From one year to the next August's mean temperature typically moves about 1.9°F either way (NOAA's standard deviation), so roughly two Augusts in three average between 90°F and 94°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 9%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| August 1 | 104°F | 82°F | 9% | 3% |
| August 8 | 104°F | 82°F | 8% | 3% |
| August 15 | 103°F | 81°F | 7% | 3% |
| August 22 | 102°F | 80°F | 7% | 3% |
| August 31 | 100°F | 78°F | 7% | 3% |
Every day of August: normal high, low and chance of precipitation (warmest afternoon August 1, coldest night August 31)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| August 1 | 104°F | 82°F | 9% | 3% | 14 h |
| August 2 | 104°F | 82°F | 9% | 3% | 14 h |
| August 3 | 104°F | 82°F | 8% | 3% | 14 h |
| August 4 | 104°F | 82°F | 8% | 3% | 13 h 50 min |
| August 5 | 104°F | 82°F | 8% | 3% | 13 h 50 min |
| August 6 | 104°F | 82°F | 8% | 3% | 13 h 50 min |
| August 7 | 104°F | 82°F | 8% | 3% | 13 h 50 min |
| August 8 | 104°F | 82°F | 8% | 3% | 13 h 50 min |
| August 9 | 104°F | 82°F | 8% | 3% | 13 h 50 min |
| August 10 | 104°F | 82°F | 8% | 3% | 13 h 40 min |
| August 11 | 104°F | 82°F | 8% | 3% | 13 h 40 min |
| August 12 | 104°F | 81°F | 8% | 3% | 13 h 40 min |
| August 13 | 103°F | 81°F | 8% | 3% | 13 h 40 min |
| August 14 | 103°F | 81°F | 7% | 3% | 13 h 40 min |
| August 15 | 103°F | 81°F | 7% | 3% | 13 h 30 min |
| August 16 | 103°F | 81°F | 7% | 3% | 13 h 30 min |
| August 17 | 103°F | 81°F | 7% | 3% | 13 h 30 min |
| August 18 | 103°F | 81°F | 7% | 3% | 13 h 30 min |
| August 19 | 103°F | 80°F | 7% | 3% | 13 h 30 min |
| August 20 | 103°F | 80°F | 7% | 3% | 13 h 20 min |
| August 21 | 102°F | 80°F | 7% | 3% | 13 h 20 min |
| August 22 | 102°F | 80°F | 7% | 3% | 13 h 20 min |
| August 23 | 102°F | 80°F | 7% | 2% | 13 h 20 min |
| August 24 | 102°F | 80°F | 7% | 2% | 13 h 20 min |
| August 25 | 102°F | 79°F | 7% | 2% | 13 h 10 min |
| August 26 | 101°F | 79°F | 7% | 2% | 13 h 10 min |
| August 27 | 101°F | 79°F | 7% | 2% | 13 h 10 min |
| August 28 | 101°F | 79°F | 7% | 2% | 13 h 10 min |
| August 29 | 101°F | 78°F | 7% | 2% | 13 h 10 min |
| August 30 | 101°F | 78°F | 7% | 2% | 13 h |
| August 31 | 100°F | 78°F | 7% | 3% | 13 h |
- Normal high
- 103°FAugust average
- Normal low
- 81°FAugust average
- Precipitation
- 0.32 inmonth total
- Days with precipitation
- 20.01 inch or more
- Days at 90°F or more
- 30
- Daylight
- 14 h to 13 hAugust 1 to August 31
- Days at 70°F or more
- 31
- Days at 80°F or more
- 31
- Sunshine
- 92%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00023169; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Las Vegas in August?
On a given August day the chance of 0.01 inch or more is 7% on average, highest around August 1 (9%). In all, 0.32 in falls on 2 days of a normal August.
In a normal August in Las Vegas, 30 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00023169.
How humid and windy is Las Vegas in August?
At 3 p.m. the normal temperature is 99°F with 15% relative humidity and a dew point of 43°F; at 6 a.m. it is 79°F with 29% humidity. The wind averages 7.9 mph, most often from the south-southwest in the afternoon. A dew point under 50°F feels dry.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 79°F | 45°F | 29% | 5.9 mph | 71% |
| 9 a.m. | 89°F | 45°F | 22% | 5.9 mph | 68% |
| noon | 96°F | 44°F | 17% | 8.2 mph | 59% |
| 3 p.m. | 99°F | 43°F | 15% | 10.2 mph | 52% |
| 6 p.m. | 96°F | 42°F | 16% | 9.8 mph | 59% |
| 9 p.m. | 89°F | 43°F | 20% | 8.4 mph | 70% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00023169. Hourly normals exist only for NOAA's first-order stations; a dash where NOAA publishes no value for that hour (the sky at some hours).
What are the records for August in Las Vegas?
The warmest August temperature on Las Vegas's official record (since 1937) is 116°F, on August 1, 1938; the coldest is 54°F, on August 3, 1937. The wettest August brought 2.59 in (1957).
The August mean against the 1991-2020 normal of 91.7°F: 2021 93.0°F (+1.3), 2022 91.1°F (−0.6), 2023 89.6°F (−2.1), 2024 94.2°F (+2.5), 2025 93.5°F (+1.8), 2026 96.3°F (+4.6). 4 of 6 ran warmer than normal.
| August | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 93.0°F | +1.3°F | 0.00 in |
| 2022 | 91.1°F | −0.6°F | 0.61 in |
| 2023 | 89.6°F | −2.1°F | 1.17 in |
| 2024 | 94.2°F | +2.5°F | 0.00 in |
| 2025 | 93.5°F | +1.8°F | 0.00 in |
| 2026 | 96.3°F | +4.6°F | 0.18 in |
Source: records: ACIS, NWS threaded record LASthr; recent months: ACIS, station USW00023169. Records and recent months use complete months only.
How does August in Las Vegas compare across Nevada?
Across the 55 places PlainClimate covers in Nevada, August normal highs run from 76°F in Incline Village to 108°F in Laughlin; Las Vegas's is 103°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.