Climate of St. Louis, Missouri

St. Louis, Missouri, experiences a humid continental climate with distinct seasons. This climate type is characterized by warm to hot summers and cold winters, with significant temperature variations between seasons. In this comprehensive overview, we will explore the various aspects of St. Louis’ climate, including temperature, precipitation, seasonal changes, and how this climate impacts the local environment and daily life.

Sunset view of beautiful Japanese garden in Midwest in fall; traditional Japanese bridge in the background

General Overview:

According to Citiesplustowns, St. Louis’ climate falls within the humid continental category, typical of the central United States. The city’s location along the Mississippi River and proximity to the Great Plains contributes to its unique climate patterns.


Summer (June – August): Summers in St. Louis are warm to hot, with daytime highs typically ranging from the upper 80s to low 90s Fahrenheit (around 30-35°C). Heatwaves can push temperatures into the mid-90s°F (around 35-38°C) or higher. Nights are generally warm, with temperatures in the 60s and 70s°F (around 15-24°C). Humidity levels can be high during the summer months, making it feel even hotter. Thunderstorms are common during this season. The warm and humid climate is ideal for outdoor activities, from picnics in the park to enjoying the city’s outdoor events.

Fall (September – November): Fall in St. Louis marks the transition from the heat of summer to cooler temperatures. September still sees daytime highs in the upper 80s to low 90s°F (around 30-35°C), but with reduced humidity. October and November bring progressively cooler weather, with daytime highs ranging from the upper 60s to low 70s°F (around 20-24°C). Nights become cooler, with temperatures dropping into the 40s and 50s°F (around 4-15°C). Fall foliage is a highlight, with trees displaying vibrant shades of red, yellow, and orange.

Winter (December – February): Winters in St. Louis are cold, with daytime highs typically ranging from the upper 30s to low 40s°F (around 3-6°C). Nights are frigid, often dropping below freezing, with temperatures in the 20s and 30s°F (around -6 to 4°C). The city experiences some snowfall during the winter months, with monthly averages ranging from 4 to 6 inches (10-15 cm). The season is characterized by overcast skies and occasional freezing rain. Winter weather can impact transportation and daily routines, but snowfall is generally manageable.

Spring (March – May): Spring in St. Louis is marked by gradually warming temperatures. March starts with daytime highs in the 50s and 60s°F (around 10-20°C), and by May, daytime highs reach the upper 60s to low 70s°F (around 20-24°C). Nights are cool but gradually become milder. Spring can bring occasional rain showers as the weather transitions into warmer conditions. It’s an ideal season for outdoor activities and enjoying the city’s parks and gardens as the landscape comes to life.

St. Louis downtown city skyline at twilight.


St. Louis’ humid continental climate is characterized by moderate precipitation levels, with some variation between seasons.

Summer: The summer months of June, July, and August are relatively wet, with average monthly precipitation ranging from 3 to 4 inches (76-102 mm). Thunderstorms are common during this season and can bring heavy rainfall.

Fall: Fall sees a reduction in precipitation compared to summer. September and October typically receive around 2 to 3 inches of rainfall each month, with drier conditions in November.

Winter: Winter in St. Louis is relatively dry, with monthly precipitation averages typically around 2 to 3 inches (51-76 mm). While snowfall occurs, it is not as significant as in some other parts of the country.

Spring: Spring months, particularly April and May, experience an increase in precipitation. Monthly averages range from 3 to 4 inches (76-102 mm), with occasional rain showers. Spring rainfall is essential for replenishing groundwater and sustaining local vegetation.

St. Louis can experience severe weather events, including thunderstorms, heavy rainfall, and occasional winter storms. Residents are accustomed to monitoring weather forecasts and being prepared for potential severe weather events.

Seasonal Changes:

St. Louis’ climate significantly influences various aspects of life, from outdoor activities to local culture and events.

Summer Recreation:* Summers provide an opportunity for residents and visitors to enjoy outdoor activities, such as picnics, hiking, water sports, and summer festivals. The season is perfect for exploring the city’s parks and outdoor events.

Fall Foliage:* Fall is a popular time for leaf-peeping and enjoying the vibrant autumn colors in local parks and forests. The city hosts various autumn festivals and cultural events to celebrate the season.

Winter Activities:* The winter season attracts those looking to enjoy winter sports, such as ice skating, sledding, and seasonal festivities. Local parks and outdoor ice rinks offer opportunities for winter fun.

Spring Blooms:* Spring in St. Louis marks the blossoming of trees and flowers, adding color and vibrancy to the city. It’s a time for gardening, outdoor events, and festivals celebrating the season.

St. Louis, Missouri, USA downtown skyline from above.

Climate Impact on Daily Life:

St. Louis’ climate significantly influences daily life, affecting activities, clothing choices, and regional industries.

Seasonal Wardrobe:* Residents adapt their wardrobes to the changing seasons. Summers call for light, breathable clothing, while winters require warm layers, winter gear, and appropriate attire for outdoor activities.

Winter Preparedness:* Residents are prepared for winter weather, including snow removal practices for driveways and sidewalks. Winter weather can impact transportation and daily routines.

Outdoor Activities:* The climate encourages residents and visitors to engage in a wide variety of outdoor activities throughout the year, from hiking and water sports in the summer to enjoying parks and cultural events in the colder months.

Festivals and Cultural Events:* St. Louis’ culture is influenced by its climate, with various events and festivals celebrating the seasons, including summer music festivals, fall harvest events, and spring gardening shows.

St. Louis, Missouri, experiences a humid continental climate with distinct seasons, providing a range of outdoor and cultural experiences for residents and visitors. The city’s rich cultural heritage, proximity to natural attractions, and seasonal changes make it an attractive destination for those seeking both outdoor adventure and cultural enjoyment. While the climate presents some seasonal variations and the potential for severe weather events, it enhances the region’s charm and provides opportunities for seasonal activities and celebrations.