When to go · Collinsville, Illinois
Collinsville, Illinois in June
Great month. Inside Collinsville, Illinois's best window: May–Oct (festivals, warm weather).
Key facts
- Verdict
- Great
- Temperature
- 30°C (86°F)86°F (30°C) / 65°C (149°F)149°F (65°C)
- average high / low
- Rain days
- 8
- Crowds
- High
- United States overall
- Prices
- High
- United States overall
Verdict
Inside Collinsville, Illinois's best window: May–Oct (festivals, warm weather).
Is another month better than June?
No other month rates higher than June for Collinsville, Illinois in this guide.
Weather in June
- Collinsville, IllinoisHighs around 30 °C (86 °F), lows around 65 °C (149 °F), rain on about 8 daysHighs around 86 °F (30 °C), lows around 149 °F (65 °C), rain on about 8 days
Crowds and prices
- Crowds · United States overall
- High
- Prices · United States overall
- High
United States overall: Rockies and northern parks open; desert heat builds; hurricane season starts. Book parks months ahead.
High-price month: see what to book ahead.
Compare two months
Weather, crowds and prices for any two months in Collinsville, Illinois, side by side.
Verdict
Jun: Great
May: Great
Daytime high
Jun: 30 °C (86 °F)86 °F (30 °C)
May: 20 °C (68 °F)68 °F (20 °C)
Night low
Jun: 65 °C (149 °F)149 °F (65 °C)
May: 55 °C (131 °F)131 °F (55 °C)
Rain days
Jun: 8
May: 5 (better)
Crowds
Jun: High
May: Medium
Prices
Jun: High
May: Medium
Festivals listed
Jun: 0
May: 1
June: Inside Collinsville, Illinois's best window: May–Oct (festivals, warm weather).
May: Inside Collinsville, Illinois's best window: May–Oct (festivals, warm weather).
Collinsville, Illinois: figures are long-term averages from this guide, not a forecast.
What to pack
- Light, breathable clothes, a sun hat and sunscreen