Las Vegas, NV weather in August
August in Las Vegas: very hot and dry. Highs 103°F, lows 81°F, about 2 wet days. This is the peak of the warm season in Las Vegas. Midday heat is the main thing to plan around.
- Normal high
- 103°F
- Normal low
- 81°F
- Wet days
- 2
- 0.3 in total
- Muggy days
- 0
- dew point 65°F+
How August changes from start to finish
| August 1 | August 31 | |
|---|---|---|
| Normal high | 104°F | 100°F |
| Normal low | 82°F | 78°F |
| Chance of a wet day | 8% | 7% |
| Sunrise / sunset | 5:47 am / 7:46 pm | 6:11 am / 7:10 pm |
| Daylight | 14.0 h | 13.0 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Pacific Time).
A typical August day
- 6 am82°Fdew point 45°F
- 9 am91°Fdew point 46°F
- Noon99°Fdew point 45°F
- 3 pm101°Fdew point 44°F
- 6 pm98°Fdew point 42°F
- 9 pm92°Fdew point 43°F
NOAA hourly normals (local standard time) from Las Vegas Mccarran Airport (7 mi away); average wind 8 mph; clear or few clouds in 55% of daytime hours, mostly cloudy or overcast in 19%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F0 of 31
- Hot dayshigh 90°F or more30 of 31
- Muggy daysdaily mean dew point 65°F or more0 of 31
- Wet daysat least 0.01 in of rain or melted snow2 of 31
- Notable rainat least 0.10 in1 of 31
- Freezing nightslow 32°F or below0 of 31
Average days per August, counted from daily records for each year 1991-2020.
Rain in August
Normal precipitation is 0.3 in; a dry August brings about 0.04 in and a wet one about 0.3 in (25th and 75th percentiles). Days with half an inch or more are rare.
How August varies from year to year
- Warmest August, 1991-20202020: average high 107°F
- Coolest August2014: average high 99°F
- Wettest August2012: 2.3 in
- Driest August1996: no measurable precipitation
- Highest reading114°F (August 18, 2020)
- Lowest reading65°F (August 30, 2010)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
August compared with July and September
| July | August | September | |
|---|---|---|---|
| Normal high | 105°F | 103°F | 95°F |
| Normal low | 82°F | 81°F | 72°F |
| Wet days | 3 | 2 | 2 |
| Comfortable days | 0 | 0 | 1 |
| Daylight | 14.3 h | 13.5 h | 12.4 h |
Highs change by -2°F from July and -8°F into September.
Nearby alternatives in August
- Warmer: Furnace Creek, CA98 mi · high 116°F · 1 wet day
- Cooler: Victorville, CA166 mi · high 97°F · 1 wet day
How Las Vegas ranks in August
- Normal high11th warmest of 378 cities; 1st of 3 in Nevada
- Wet days63rd driest of 378
- Comfortable days309th most of 341
What to pack for Las Vegas in August
- Light, breathable clothing – highs near 103°F
Heating and cooling
August has 0 heating degree days and 828 cooling degree days (base 65°F), 15% of the year's total heating and cooling demand.
Questions
How hot is Las Vegas in August?
The normal high is 103°F and the normal low is 81°F. From 1991 to 2020 the hottest August reading was 114°F (most recently on August 18, 2020).
Does it rain a lot in Las Vegas in August?
About 2 days in August have at least 0.01 in of precipitation, and the normal total is 0.3 in. The wettest August in 1991-2020 was in 2012 (2.3 in); the driest was in 1996, with no measurable precipitation.
Is August a good time to visit Las Vegas?
August ranks 12th of 12 months on our comfort score for Las Vegas (36 out of 100). It has almost no comfortable days and about 30 days at 90°F or hotter. The best month is March.
Where the numbers come from
- Temperature, rain, snowfall, snow depth, frost dates, humidity and wind by hour and cloud cover: Las Vegas Mccarran Airport (USW00023169), 7.3 mi SSW of the city center, 2,131 ft (135 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Mccarran International Airport (723860-23169), 7.3 mi SSW of the city center, 2,175 ft (179 ft higher than the city). Hourly observations, 1991-2020.