Las Vegas · August
Run in the pre-dawn.
Average highs hit 102°F. August is the hottest stretch of the year. Dry air (25% humidity) makes the heat more bearable than the numbers suggest. Heat builds fast after sunrise — the pre-dawn hour is the only reliably comfortable window.
Avg high / low
102° / 79°F
Humidity
25%
Rain days
5/mo
Wind
13 mph
What August feels like in Las Vegas
Sunrise
05:59
Mid-month average
Sunset
19:28
Mid-month average
Time-of-day breakdown
Morning
Cool relative to the day's peak, but heat builds fast. By 10 AM you're already chasing comfort.
Midday
Heat peaks here. Skip unless you've got shade and pace tolerance.
Evening
Cools off after sunset but still warm. Good for easy efforts; avoid hard intervals if you're chasing pace.
What to wear running in Las Vegas in August
The kit for August in Las Vegas: light, breathable, and moisture-wicking — singlet or short-sleeve only.
August vs the surrounding months
vs July
-2° avg high
0 rain days
Las Vegas in July →
August
102°F avg high
5 rain days
Best: pre-dawn
vs September
+7° avg high
+2 rain days
Las Vegas in September →
Frequently Asked Questions
What is the best time of day to run in Las Vegas in August?+
Pre-dawn. Heat builds fast after sunrise — the pre-dawn hour is the only reliably comfortable window.
What's the average temperature in Las Vegas in August?+
Average high 102°F, average low 79°F.
How does August compare to surrounding months in Las Vegas?+
Compared to July (avg high 105°F), August is cooler. Compared to September (avg high 95°F), August is warmer.
Does it rain often in Las Vegas in August?+
Expect about 5 measurable rain days in August, on average.