St. Charles Weather in March

March in St. Charles sees daytime temperatures around 14°C (57°F) and lows of 2°C (36°F) at night. With around 87 mm (3.4 in) of rainfall expected, it's worth packing a rain jacket.

Rainfall in St. Charles in March

Historically, approximately 11 days this month are expected to have rain, averaging 87 mm (3.4 in). Individual showers can be quite heavy this month. A proper umbrella or rain jacket is worth having.

Temperature in St. Charles in March

If you're visiting St. Charles in March, expect highs of 14°C (57°F) and overnight lows around 2°C (36°F). Even when the weather is stable, mornings and evenings can still feel distinctly cool. With lows around 2°C (36°F), nights are cold. The upside is that cool, crisp nights are often the best for a deep sleep.

Sunshine in St. Charles in March

With approximately 199 hours of sunshine, the days are filled with clear skies. Despite it being a cool month, it makes for pleasant days outside.

If you prefer enjoying temperate temperatures and rain-free days, September and October typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.