St. Louis city Climate
St. Louis city, Missouri
Avg Annual Temp
58.0°F
Annual Precip
43.9"
Annual Snowfall
—
Extreme Heat Days
46.9
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About St. Louis city Weather
Urban Heat in the Heartland
St. Louis city averages 58.0°F annually, making it one of the warmer urban environments in the central United States. It consistently sits well above the national median temperature.
One of Missouri's Warmest Spots
The city's 58.0°F average temperature is more than three degrees higher than the Missouri state average. This thermal gap is driven by both its southern location and urban heat island effects.
Hotter Than the Surrounding Suburbs
The city averages 47 days of extreme heat per year, significantly higher than its neighboring rural counties. Its July average of 80.6°F makes it a regional hotspot during the summer months.
Intense Summers and Soft Winters
While specific snowfall data is unavailable, the city's 32.6°F January average suggests shorter freezing periods. Summer is the dominant season, with temperatures regularly exceeding 90°F.
Invest in Heavy-Duty Cooling
With 47 days above 90°F, high-capacity cooling systems are essential for safety and comfort. Residents should also plan for the 43.9 inches of rain that can cause rapid urban runoff.
Frequently Asked Questions
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Data source: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020.
Climate normals are 30-year averages of weather variables computed from 1991 to 2020. Station data is aggregated to county level using spatial averaging. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.