When to go · Collinsville, Illinois
Collinsville, Illinois in October
Great month. Inside Collinsville, Illinois's best window: May–Oct (festivals, warm weather).
Key facts
- Verdict
- Great
- Temperature
- 20°C (68°F)68°F (20°C) / 45°C (113°F)113°F (45°C)
- average high / low
- Rain days
- 5
- Crowds
- Medium
- United States overall
- Prices
- Medium
- United States overall
Verdict
Inside Collinsville, Illinois's best window: May–Oct (festivals, warm weather).
Is another month better than October?
No other month rates higher than October for Collinsville, Illinois in this guide.
Weather in October
- Collinsville, IllinoisHighs around 20 °C (68 °F), lows around 45 °C (113 °F), rain on about 5 daysHighs around 68 °F (20 °C), lows around 113 °F (45 °C), rain on about 5 days
Crowds and prices
- Crowds · United States overall
- Medium
- Prices · United States overall
- Medium
United States overall: Best all-round month: New England foliage, desert parks, cooler cities. High roads start closing late in the month.
Compare two months
Weather, crowds and prices for any two months in Collinsville, Illinois, side by side.
Verdict
Oct: Great
May: Great
Daytime high
Oct: 20 °C (68 °F)68 °F (20 °C)
May: 20 °C (68 °F)68 °F (20 °C)
Night low
Oct: 45 °C (113 °F)113 °F (45 °C)
May: 55 °C (131 °F)131 °F (55 °C)
Rain days
Oct: 5
May: 5
Crowds
Oct: Medium
May: Medium
Prices
Oct: Medium
May: Medium
Festivals listed
Oct: 0
May: 1
October: 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
Nothing unusual for the weather this month.