St. Charles Weather in December

December in St. Charles brings low temperatures, with daytime highs of 7°C (45°F) and nights around -3°C (27°F). Quite a bit of snow/rainfall is expected, around 100 mm (3.9 in), so pack an umbrella.

Rainfall in St. Charles in December

Based on our climate data of the past 30 years, about 11 days of snow/rain are anticipated, with 100 mm (3.9 in) on average. Individual showers can be quite heavy this month. A proper umbrella or rain jacket is worth having.

Temperature in St. Charles in December

Daytime highs in St. Charles in December reach 7°C (45°F), with nights around -3°C (27°F). December is typically considered a winter month. It stays cool throughout the day, so warm layers are a good idea from morning to evening. With overnight lows of -3°C (27°F), temperatures fall below freezing at night. An extra thick blanket can make a real difference if your accommodation runs cold.

Sunshine in St. Charles in December

The month experiences a moderate amount of sunlight, with 128 hours of sunshine. This provides a nice balance between sunshine and clouds.

December in St. Charles has its charm, but if you're looking for destinations with pleasant temperatures and sunny skies, our weather planner can help you explore other options in the world.