Weather in Saint Charles in May
Saint Charles, United States averages a high of 23.9°C (75°F) and low of 14.2°C (57.6°F) in May, with 13 rain days and 10.5 hours of daily sunshine. Travel score: 78.5/100 (Good). The best time to visit Saint Charles is September.
High
24°C75°F
Low
14°C58°F
🌧️
13
rain days
☀️
10.5
hrs/day sunshine
💧
71%
humidity
79— Good
May in Saint Charles is warm and occasionally wet — pack an umbrella and enjoy indoor attractions too.
What are the average temperatures in Saint Charles?
How much does it rain in Saint Charles in May?
Saint Charles receives an average of 124mm of rainfall across 13 rainy days in May. The annual total is 1062.1mm.
What should I pack for Saint Charles in May?
Essentials
👟
Comfortable walking shoes
Essential for exploring the city
👕
Light layers and t-shirts
Warm weather around 24°C
🧴
Sunscreen SPF 30+
11 hours of sunshine daily
🕶️
Sunglasses
Protect your eyes from bright sun
Recommended
🧥
Light rain jacket
Some rainy days expected (13 days)
☔
Umbrella
Be prepared for occasional showers
Traveling to United States in May?
Don't let a public holiday surprise you — restaurants, shops, and attractions may be closed.
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Data based on 1994–2024 averages · Last updated: 2024-12-31