When to go · Monticello, Illinois
Monticello, Illinois in August
Great month. Inside Monticello, Illinois's best window: May–Oct (park and train season); late Sep–Oct for foliage.
Key facts
- Verdict
- Great
- Temperature
- 30°C86°F / 18°C64°F
- average high / low
- Rain days
- 8
- Crowds
- High
- United States overall
- Prices
- High
- United States overall
Verdict
GreatBest and avoid months for Monticello, Illinois
Inside Monticello, Illinois's best window: May–Oct (park and train season); late Sep–Oct for foliage.
Weather in August
- Monticello, IllinoisHighs around 30 °C, lows around 18 °C, rain on about 8 daysHighs around 86 °F, lows around 64 °F, rain on about 8 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.
What to pack
- Light, breathable clothes, a sun hat and sunscreen