St. Louis · July
Run in the pre-dawn.
Average high is 88°F with a 70°F overnight low. Expect 16 rain days — plan around the radar. Humid heat punishes mid-morning — get out before sunrise for the only truly comfortable window.
Avg high / low
88° / 70°F
Humidity
72%
Rain days
16/mo
Wind
9 mph
What July feels like in St. Louis
Sunrise
05:50
Mid-month average
Sunset
20:23
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
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 St. Louis in July
The kit for July in St. Louis: light, breathable, and moisture-wicking — singlet or short-sleeve only, a water-resistant cap or jacket on standby.
July vs the surrounding months
vs June
+2° avg high
+1 rain days
St. Louis in June →
July
88°F avg high
16 rain days
Best: pre-dawn
vs August
+2° avg high
0 rain days
St. Louis in August →
Frequently Asked Questions
What is the best time of day to run in St. Louis in July?+
Pre-dawn. Humid heat punishes mid-morning — get out before sunrise for the only truly comfortable window.
What's the average temperature in St. Louis in July?+
Average high 88°F, average low 70°F.
How does July compare to surrounding months in St. Louis?+
Compared to June (avg high 86°F), July is warmer. Compared to August (avg high 85°F), July is warmer.
Does it rain often in St. Louis in July?+
Expect about 16 measurable rain days in July, on average.