Des Moines · August
Run in the morning.
Comfortable average high of 83°F, dipping to 66°F at night. Humidity rises with the sun — morning runs catch the driest, coolest window.
Avg high / low
83° / 66°F
Humidity
71%
Rain days
14/mo
Wind
11 mph
What August feels like in Des Moines
Sunrise
06:24
Mid-month average
Sunset
20:12
Mid-month average
Time-of-day breakdown
Morning
Coolest, driest air of the day. The window before sunrise is the most reliable comfortable hour.
Midday
Mild but UV and traffic peak. Workable if you don't mind shifting your pace.
Evening
Warm and runnable. Crowded routes but the air's typically calm.
What to wear running in Des Moines in August
The kit for August in Des Moines: shorts and a short-sleeve are the standard kit, a water-resistant cap or jacket on standby.
August vs the surrounding months
vs July
-2° avg high
+3 rain days
Des Moines in July →
August
83°F avg high
14 rain days
Best: morning
vs September
+5° avg high
+3 rain days
Des Moines in September →
Frequently Asked Questions
What is the best time of day to run in Des Moines in August?+
Morning. Humidity rises with the sun — morning runs catch the driest, coolest window.
What's the average temperature in Des Moines in August?+
Average high 83°F, average low 66°F.
How does August compare to surrounding months in Des Moines?+
Compared to July (avg high 85°F), August is cooler. Compared to September (avg high 78°F), August is warmer.
Does it rain often in Des Moines in August?+
Expect about 14 measurable rain days in August, on average.