St. Louis city Climate
St. Louis city, Missouri
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
58.0°F
Annual Precip
43.9"
Annual Snowfall
—
Extreme Heat Days
47
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
7a
Minimum winter temperature range for plant survival
4,703
Excellent for heat-loving crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: St. Louis city
Climate Verdict
St. Louis city has a mild, with an average annual temperature of 58.0°F, moderately wet with 43.9 inches of annual precipitation, occasional hot days — 46.9 per year above 90°F. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are cold, with January averaging 32.6°F. summers are hot, with July averaging 80.6°F. The 48°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
The moderate temperatures support hiking, cycling, and camping comfortably in spring, summer, and fall.
Regional Context
St. Louis city is 3.1°F warmer than the Missouri statewide average of 54.9°F.
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
What is the average temperature in St. Louis city?
How much rain does St. Louis city get?
How hot does St. Louis city get in summer?
How cold are winters in St. Louis city?
Track your own weather in St. Louis city
Ambient Weather personal weather stations give you hyperlocal climate data.
Sponsored
Data sources: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020. Forecast and alert data from National Weather Service API. Air quality data from Open-Meteo.
Climate normals are 30-year averages of weather variables. Station data is aggregated to county level. Forecasts and alerts are fetched live and may change frequently. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.