Saint Charles Weather in July

Saint Charles in July averages 29°C (84°F) during the day and 17°C (63°F) at night. Keep in mind that quite a bit of rainfall is expected this month.

Rainfall in Saint Charles in July

Based on our climate data of the past 30 years, about 11 days of rain are anticipated, with 111 mm (4.4 in) on average. The rain this month tends to fall in heavier spells rather than light drizzle. When it rains, showers can be significant.

Temperature in Saint Charles in July

Daytime temperatures in Saint Charles reach 29°C (84°F) in July, dropping to 17°C (63°F) at night. The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. Nights drop to around 17°C (63°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable. It's the warmest month of the year on average, so summer clothing is the way to go.

Sunshine in Saint Charles in July

Expect sunny days throughout the month, with an estimated 319 hours of sunshine. This makes it a pleasant time to visit Saint Charles.

For Saint Charles itself, September generally stands out with 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.