When to go · Monticello, Illinois
Monticello, Illinois in June
Great month. Inside Monticello, Illinois's best window: May–Oct (park and train season); late Sep–Oct for foliage.
Key facts
- Verdict
- Great
- Temperature
- 29°C (84°F)84°F (29°C) / 17°C (63°F)63°F (17°C)
- average high / low
- Rain days
- 10
- Crowds
- High
- United States overall
- Prices
- High
- United States overall
Verdict
Inside Monticello, Illinois's best window: May–Oct (park and train season); late Sep–Oct for foliage.
Is another month better than June?
No other month rates higher than June for Monticello, Illinois in this guide.
Weather in June
- Monticello, IllinoisHighs around 29 °C (84 °F), lows around 17 °C (63 °F), rain on about 10 daysHighs around 84 °F (29 °C), lows around 63 °F (17 °C), rain on about 10 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 Monticello, Illinois, side by side.
Verdict
Jun: Great
May: Great
Daytime high
Jun: 29 °C (84 °F)84 °F (29 °C)
May: 24 °C (75 °F)75 °F (24 °C)
Night low
Jun: 17 °C (63 °F)63 °F (17 °C)
May: 12 °C (54 °F)54 °F (12 °C)
Rain days
Jun: 10 (better)
May: 11
Crowds
Jun: High
May: Medium
Prices
Jun: High
May: Medium
Festivals listed
Jun: 0
May: 1
June: Inside Monticello, Illinois's best window: May–Oct (park and train season); late Sep–Oct for foliage.
May: Inside Monticello, Illinois's best window: May–Oct (park and train season); late Sep–Oct for foliage.
Monticello, Illinois: figures are long-term averages from this guide, not a forecast.
What to pack
- A rain jacket or umbrella and shoes that dry fast