Quick Answer: Running in St. Louis
Running in St. Louis: A Seasonal Guide
St. Louis's humid continental climate shapes the running experience across all four seasons. Warm summers and the transition seasons define the running calendar. Humidity can be the hidden factor that makes or breaks a run here.
Peak season (April and May): Mild temperatures and lower humidity create conditions most runners dream about. You can comfortably run at almost any time of day.
Off-season strategy: In summer, morning runs before 8 AM avoid the worst heat. In winter, midday runs let you catch the warmest hours.
Local runners know that temperature swings of 30-40°f in 24 hours are common. Also worth noting: summer humidity is oppressive - run before sunrise.
Best Months to Run
April, May, September, October offer the most comfortable running conditions in St. Louis. During these months, you'll find mild temperatures and manageable weather patterns perfect for outdoor running.
Seasonal Running Temperatures
Temperature Range by Season
Low: 24°F
High: 42°F
Low: 45°F
High: 68°F
Low: 68°F
High: 90°F
Low: 48°F
High: 70°F
Running Weather Tips for St. Louis
Classic 'if you don't like the weather, wait 5 minutes' city
Temperature swings of 30-40°F in 24 hours are common
Summer humidity is oppressive - run before sunrise
Spring storms can be severe with little warning
Popular Running Routes in St. Louis
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6 min readFrequently Asked Questions
What is the best time to run in St. Louis?+
What weather challenges do runners face in St. Louis?+
What are the average running temperatures in St. Louis?+
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