Introduction
St. Louis, Missouri experiences a humid continental climate, characterized by hot, humid summers and cold, snowy winters. December marks the transition from fall to winter, bringing with it a noticeable shift in weather patterns. This guide provides a comprehensive overview of the weather conditions in St. Louis during December, including temperature, precipitation, and severe weather risks.

Temperature
December is typically the coldest month in St. Louis, with average temperatures ranging from a low of 25°F (-4°C) to a high of 41°F (5°C). However, temperatures can fluctuate significantly throughout the month, with occasional cold snaps and periods of mild weather.
| Date Range | Average Temperature (°F) |
|---|---|
| December 1-7 | 35 |
| December 8-14 | 33 |
| December 15-21 | 31 |
| December 22-28 | 29 |
| December 29-31 | 27 |
Precipitation
St. Louis receives an average of 3.2 inches (81 mm) of precipitation in December, making it the wettest month of the winter. This precipitation typically falls as rain or snow, with the likelihood of snow increasing towards the end of the month.
| Date Range | Average Precipitation (inches) |
|---|---|
| December 1-7 | 1.2 |
| December 8-14 | 0.8 |
| December 15-21 | 0.6 |
| December 22-28 | 0.4 |
| December 29-31 | 0.2 |
Severe Weather
While severe weather is less common in December than during the spring and summer months, it is still possible to experience thunderstorms, hail, and tornadoes. The National Weather Service recommends staying informed about weather conditions and taking precautions during severe weather events.
Thunderstorms
December thunderstorms are typically less intense than those during the summer months, but they can still produce heavy rain, lightning, and thunder.
Hail
Hail is a form of precipitation that forms when raindrops freeze inside a cloud and then fall to the ground. While hail is less common in December than in other months, it can still occur during thunderstorms.
Tornadoes
Tornadoes are rare in December, but they have been known to occur. In the unlikely event of a tornado warning, seek immediate shelter in a sturdy building or underground.
Winter Activities
Despite the cold and wet weather, December offers a variety of winter activities in St. Louis. These activities include:
- Ice skating at the Steinberg Skating Rink in Forest Park
- Visiting the St. Louis Zoo, which is open year-round
- Attending a holiday performance at the Fox Theatre or the Saint Louis Symphony Orchestra
- Exploring the holiday lights and decorations in downtown St. Louis and other areas of the city
Tips for Staying Safe in Winter Weather
To stay safe in winter weather, it is important to take precautions such as:
- Wearing warm, waterproof clothing
- Staying informed about weather conditions
- Avoiding driving in hazardous conditions
- Taking breaks from the cold to warm up
- Seeking medical attention if you experience symptoms of hypothermia or frostbite
Conclusion
December weather in St. Louis is characterized by cold temperatures, precipitation, and the potential for severe weather. By understanding the typical weather conditions and taking necessary precautions, residents and visitors can enjoy the winter season safely and comfortably.
