Dallas · September
Run in the morning.
Average high is 89°F with a 72°F overnight low. Dry heat climbs fast after sunrise — get out in the cooler morning hours.
Avg high / low
89° / 72°F
Humidity
63%
Rain days
12/mo
Wind
11 mph
What September feels like in Dallas
Sunrise
07:11
Mid-month average
Sunset
19:32
Mid-month average
Time-of-day breakdown
Morning
Steady cool air, low wind, and good light. The standard runner window in most months.
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 Dallas in September
The kit for September in Dallas: light, breathable, and moisture-wicking — singlet or short-sleeve only.
September vs the surrounding months
vs August
-5° avg high
+1 rain days
Dallas in August →
September
89°F avg high
12 rain days
Best: morning
vs October
+10° avg high
+2 rain days
Dallas in October →
Frequently Asked Questions
What is the best time of day to run in Dallas in September?+
Morning. Dry heat climbs fast after sunrise — get out in the cooler morning hours.
What's the average temperature in Dallas in September?+
Average high 89°F, average low 72°F.
How does September compare to surrounding months in Dallas?+
Compared to August (avg high 94°F), September is cooler. Compared to October (avg high 79°F), September is warmer.
Does it rain often in Dallas in September?+
Expect about 12 measurable rain days in September, on average.