Weather in O'Fallon in June
O'Fallon, United States averages a high of 29°C (84.2°F) and low of 19.3°C (66.7°F) in June, with 10 rain days and 11.7 hours of daily sunshine. Travel score: 83.9/100 (Excellent). The best time to visit O'Fallon is September.
High
29°C84°F
Low
19°C67°F
🌧️
10
rain days
☀️
11.7
hrs/day sunshine
💧
70%
humidity
84— Excellent
June in O'Fallon is hot and occasionally wet — ideal for sightseeing and outdoor activities.
What are the average temperatures in O'Fallon?
How much does it rain in O'Fallon in June?
O'Fallon receives an average of 103.2mm of rainfall across 10 rainy days in June. The annual total is 1035.9mm.
What should I pack for O'Fallon in June?
Essentials
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Comfortable walking shoes
Essential for exploring the city
👕
Light layers and t-shirts
Warm weather around 29°C
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Sunscreen SPF 30+
12 hours of sunshine daily
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Sunglasses
Protect your eyes from bright sun
Recommended
🧥
Light rain jacket
Some rainy days expected (10 days)
☔
Umbrella
Be prepared for occasional showers
🎉Visiting United States in June?
Don't miss any public holidays — check before you book!
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Data based on 1994–2024 averages · Last updated: 2024-12-31