St. Louis, Missouri sits near the geographic center of the United States, which means it experiences a wide range of weather conditions throughout the year. From cold, snowy winters to hot, humid summers—and beautiful but sometimes unpredictable spring and fall seasons—knowing what to expect month by month can help travelers plan the perfect trip.
This complete guide breaks down St. Louis weather by month, including temperatures, precipitation, and travel tips so you can choose the best time to visit.
St. Louis Weather by Month
| Month | Avg High | Avg Low | Travel Notes |
|---|---|---|---|
| January | 40°F (4°C) | 24°F (-4°C) | Best for indoor attractions, fewer crowds |
| February | 45°F (7°C) | 28°F (-2°C) | Waterproof winter clothing recommended |
| March | 56°F (13°C) | 37°F (3°C) | Dress in layers, bring umbrella |
| April | 67°F (19°C) | 46°F (8°C) | Great for parks when dry |
| May | 76°F (24°C) | 56°F (13°C) | One of the best months to visit |
| June | 85°F (29°C) | 65°F (18°C) | Stay hydrated, plan outdoor time early |
| July | 89°F (32°C) | 70°F (21°C) | Ideal for indoor activities |
| August | 87°F (31°C) | 68°F (20°C) | Fewer crowds, summer deals |
| September | 80°F (27°C) | 59°F (15°C) | Excellent for sightseeing |
| October | 68°F (20°C) | 47°F (8°C) | Great for festivals and photos |
| November | 55°F (13°C) | 37°F (3°C) | Quiet travel season |
| December | 43°F (6°C) | 27°F (-3°C) | Holiday events and decorations |
January: Cold and Quiet
- Average High: 40°F (4°C)
- Average Low: 24°F (-4°C)
- Weather Overview: January is the coldest month in St. Louis. Snowfall is common, though usually moderate, and icy conditions can occur.
- Travel Tips: Pack warm layers, a winter coat, gloves, and boots. It’s a good month for indoor attractions like museums and sports events.
- Best For: Budget travelers and those who prefer fewer crowds.
February: Chilly with a Hint of Spring
- Average High: 45°F (7°C)
- Average Low: 28°F (-2°C)
- Weather Overview: Still cold, but slightly milder than January. Snow is possible, along with cold rain.
- Travel Tips: Bring waterproof outerwear and warm clothing. Weather can change quickly.
- Best For: Winter city breaks and Valentine’s Day getaways.
March: Early Signs of Spring
- Average High: 56°F (13°C)
- Average Low: 37°F (3°C)
- Weather Overview: March is transitional. You may experience sunny spring days or sudden cold snaps and storms.
- Travel Tips: Dress in layers and keep an umbrella handy.
- Best For: Travelers who enjoy mild temperatures and don’t mind some unpredictability.
April: Mild and Rainy
- Average High: 67°F (19°C)
- Average Low: 46°F (8°C)
- Weather Overview: Spring is in full swing. Flowers bloom, but April is one of the rainiest months.
- Travel Tips: Bring rain gear and comfortable walking shoes.
- Best For: Sightseeing, outdoor parks, and festivals—when weather cooperates.
May: Warm and Pleasant
- Average High: 76°F (24°C)
- Average Low: 56°F (13°C)
- Weather Overview: One of the best months to visit St. Louis. Warm days, cool nights, and lush greenery.
- Travel Tips: Light jackets for evenings and breathable daytime clothing.
- Best For: Outdoor activities, riverfront walks, and major events.
June: Hotter and More Humid
- Average High: 85°F (29°C)
- Average Low: 65°F (18°C)
- Weather Overview: Summer begins with increasing heat and humidity. Thunderstorms are common.
- Travel Tips: Stay hydrated, wear sunscreen, and plan outdoor activities for mornings or evenings.
- Best For: Summer festivals and family vacations.
July: Peak Summer Heat
- Average High: 89°F (32°C)
- Average Low: 70°F (21°C)
- Weather Overview: July is hot and humid, with occasional heatwaves. Afternoon storms may offer brief relief.
- Travel Tips: Lightweight clothing, hats, and air-conditioned accommodations are essential.
- Best For: Indoor attractions and Independence Day celebrations.
August: Hot but Calming Down
- Average High: 87°F (31°C)
- Average Low: 68°F (20°C)
- Weather Overview: Similar to July, though temperatures may gradually ease toward the end of the month.
- Travel Tips: Continue summer heat precautions; plan breaks indoors.
- Best For: Late-summer travel deals and less crowded attractions.
September: Comfortable and Sunny
- Average High: 80°F (27°C)
- Average Low: 59°F (15°C)
- Weather Overview: One of the most comfortable months in St. Louis. Lower humidity and pleasant days.
- Travel Tips: Light layers work well from day to night.
- Best For: Outdoor dining, walking tours, and cultural events.
October: Cool and Colorful
- Average High: 68°F (20°C)
- Average Low: 47°F (8°C)
- Weather Overview: Fall foliage peaks, and temperatures are crisp but comfortable.
- Travel Tips: Bring sweaters or light jackets, especially for evenings.
- Best For: Fall festivals, scenic drives, and photography.
November: Chilly and Calm
- Average High: 55°F (13°C)
- Average Low: 37°F (3°C)
- Weather Overview: Temperatures drop quickly, and rain becomes more common than snow.
- Travel Tips: Pack warm layers and waterproof shoes.
- Best For: Quiet travel and pre-holiday visits.
December: Cold with Holiday Charm
- Average High: 43°F (6°C)
- Average Low: 27°F (-3°C)
- Weather Overview: Cold weather returns, with occasional snow and festive holiday decorations.
- Travel Tips: Winter clothing is essential. Expect cold nights.
- Best For: Holiday markets, seasonal events, and winter ambiance.
Best Time to Visit St. Louis
- Best Overall Months: May, September, and October for mild weather and outdoor activities.
- Best Budget Travel: January–February for lower hotel prices.
- Best Summer Fun: June–August, if you’re comfortable with heat and humidity.
20 FAQs about St. Louis Weather
- What is the best month to visit St. Louis for good weather?
May, September, and October offer the most comfortable temperatures and lower humidity. - What is the coldest month in St. Louis?
January is typically the coldest month, with average lows below freezing. - What is the hottest month in St. Louis?
July is usually the hottest month, with high humidity and temperatures often above 90°F (32°C). - Does St. Louis get snow every year?
Yes, St. Louis usually gets snow each winter, though amounts vary year to year. - How much snow does St. Louis get in winter?
On average, St. Louis receives about 15–20 inches of snow annually. - Is St. Louis very humid in summer?
Yes, summer months—especially June through August—are hot and humid. - Does it rain a lot in St. Louis?
Rainfall is spread throughout the year, with spring and early summer being the wettest periods. - What month has the most rain in St. Louis?
May and June are often the rainiest months due to frequent thunderstorms. - Are tornadoes common in St. Louis?
Tornadoes are possible in spring, but direct hits on the city are relatively rare. - Is spring a good time to visit St. Louis?
Yes, spring offers mild temperatures and blooming landscapes, though weather can be unpredictable. - What should I pack for a summer trip to St. Louis?
Lightweight clothing, sunscreen, a hat, and comfortable shoes are essential. - What should I wear in St. Louis in winter?
Warm layers, a heavy coat, gloves, and waterproof boots are recommended. - Is fall weather in St. Louis comfortable for outdoor activities?
Yes, fall is one of the best seasons for walking tours and festivals. - Does St. Louis experience extreme weather?
Occasionally, St. Louis can experience heatwaves, winter storms, and strong thunderstorms. - What is the driest month in St. Louis?
February is typically one of the driest months. - Can I visit St. Louis year-round?
Yes, St. Louis is a year-round destination with attractions suited to all seasons. - Does humidity affect travel comfort in St. Louis?
Humidity can make summer temperatures feel hotter, especially in July and August. - Is St. Louis weather predictable?
Weather can change quickly, especially in spring and fall. - What months are best for outdoor festivals in St. Louis?
May, September, and October are ideal for outdoor events. - Are winters in St. Louis harsh?
Winters are cold but generally milder than northern U.S. cities, with manageable snowfall.
Final Thoughts
St. Louis offers something for travelers year-round, but weather plays a big role in shaping your experience. By understanding St. Louis weather by month, you can pack smarter, plan better, and enjoy everything the Gateway City has to offer—no matter the season.