Houston · August
Run in the pre-dawn.
Average high is 92°F with a 77°F overnight low. Humidity averages 76% — the limiting factor on most runs. Expect 21 rain days — plan around the radar. Humid heat punishes mid-morning — get out before sunrise for the only truly comfortable window.
Avg high / low
92° / 77°F
Humidity
76%
Rain days
21/mo
Wind
11 mph
What August feels like in Houston
Sunrise
06:49
Mid-month average
Sunset
20:00
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 Houston in August
The kit for August in Houston: light, breathable, and moisture-wicking — singlet or short-sleeve only, a water-resistant cap or jacket on standby.
August vs the surrounding months
vs July
+1° avg high
+1 rain days
Houston in July →
August
92°F avg high
21 rain days
Best: pre-dawn
vs September
+4° avg high
+2 rain days
Houston in September →
Frequently Asked Questions
What is the best time of day to run in Houston in August?+
Pre-dawn. Humid heat punishes mid-morning — get out before sunrise for the only truly comfortable window.
What's the average temperature in Houston in August?+
Average high 92°F, average low 77°F.
How does August compare to surrounding months in Houston?+
Compared to July (avg high 91°F), August is warmer. Compared to September (avg high 87°F), August is warmer.
Does it rain often in Houston in August?+
Expect about 21 measurable rain days in August, on average.