When to go · Jacksonville, Illinois
Jacksonville, Illinois in August
Great month. Inside Jacksonville, Illinois's best window: May–Oct.
Key facts
- Verdict
- Great
- Temperature
- 30°C (86°F)86°F (30°C) / 17°C (63°F)63°F (17°C)
- average high / low
- Rain days
- 5
- Crowds
- High
- United States overall
- Prices
- High
- United States overall
Verdict
Inside Jacksonville, Illinois's best window: May–Oct.
Is another month better than August?
No other month rates higher than August for Jacksonville, Illinois in this guide.
Weather in August
- Jacksonville, IllinoisHighs around 30 °C (86 °F), lows around 17 °C (63 °F), rain on about 5 daysHighs around 86 °F (30 °C), lows around 63 °F (17 °C), rain on about 5 days
Crowds and prices
- Crowds · United States overall
- High
- Prices · United States overall
- High
United States overall: Hot and busy; wildfire smoke in the West, hurricane peak begins in the Southeast.
High-price month: see what to book ahead.
Compare two months
Weather, crowds and prices for any two months in Jacksonville, Illinois, side by side.
Verdict
Aug: Great
May: Great
Daytime high
Aug: 30 °C (86 °F)86 °F (30 °C)
May: 24 °C (75 °F)75 °F (24 °C)
Night low
Aug: 17 °C (63 °F)63 °F (17 °C)
May: 11 °C (52 °F)52 °F (11 °C)
Rain days
Aug: 5
May: 5
Crowds
Aug: High
May: Medium
Prices
Aug: High
May: Medium
Festivals listed
Aug: 0
May: 1
August: Inside Jacksonville, Illinois's best window: May–Oct.
May: Inside Jacksonville, Illinois's best window: May–Oct.
Jacksonville, Illinois: figures are long-term averages from this guide, not a forecast.
What to pack
- Light, breathable clothes, a sun hat and sunscreen