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When to go · Monticello, Illinois

Monticello, Illinois, month by month

The best months for Monticello, Illinois: May, Jun, Jul, Aug, Sep, Oct. Months to avoid: Jan, Feb.

Month by month

  1. JanuaryAvoidListed as a month to avoid: Jan–Feb (cold, little open); mid-summer heat and humidity.1 °C / -8 °C, 8 rain daysCrowds: Low
  2. FebruaryAvoidListed as a month to avoid: Jan–Feb (cold, little open); mid-summer heat and humidity.4 °C / -6 °C, 8 rain daysCrowds: Low · 1 festival or holiday
  3. MarchGoodOutside the best window (May–Oct (park and train season); late Sep–Oct for foliage). Across United States: Spring break fills Florida beaches and parks; the desert parks come into season.11 °C / 0 °C, 10 rain daysCrowds: Medium · 2 festivals or holidays
  4. AprilGoodOutside the best window (May–Oct (park and train season); late Sep–Oct for foliage). Across United States: Good month for the Southwest, Washington cherry blossoms, the South; mountain roads still closed.18 °C / 6 °C, 11 rain daysCrowds: Medium · 1 festival or holiday
  5. MayGreatInside Monticello, Illinois's best window: May–Oct (park and train season); late Sep–Oct for foliage.24 °C / 12 °C, 11 rain daysCrowds: Medium · 1 festival or holiday
  6. JuneGreatInside Monticello, Illinois's best window: May–Oct (park and train season); late Sep–Oct for foliage.29 °C / 17 °C, 10 rain daysCrowds: High
  7. JulyGreatInside Monticello, Illinois's best window: May–Oct (park and train season); late Sep–Oct for foliage.31 °C / 19 °C, 9 rain daysCrowds: High · 1 festival or holiday
  8. AugustGreatInside Monticello, Illinois's best window: May–Oct (park and train season); late Sep–Oct for foliage.30 °C / 18 °C, 8 rain daysCrowds: High
  9. SeptemberGreatInside Monticello, Illinois's best window: May–Oct (park and train season); late Sep–Oct for foliage.26 °C / 14 °C, 8 rain daysCrowds: Medium · 1 festival or holiday
  10. OctoberGreatInside Monticello, Illinois's best window: May–Oct (park and train season); late Sep–Oct for foliage.19 °C / 7 °C, 8 rain daysCrowds: Medium
  11. NovemberMixedOutside the best window (May–Oct (park and train season); late Sep–Oct for foliage). Across United States: Quiet between holidays; Thanksgiving week is the busiest travel period of the year.11 °C / 1 °C, 9 rain daysCrowds: Medium · 1 festival or holiday
  12. DecemberMixedOutside the best window (May–Oct (park and train season); late Sep–Oct for foliage). Across United States: Holiday lights in New York, ski season opens; flights and hotels peak around Christmas and New Year.3 °C / -5 °C, 9 rain daysCrowds: High · 1 festival or holiday