When to go · Jacksonville, Illinois
Jacksonville, Illinois, month by month
The best months for Jacksonville, Illinois: May, Jun, Jul, Aug, Sep, Oct. Months to avoid: Jan, Feb.
Month by month
- JanuaryAvoidListed as a month to avoid: Jan–Feb (cold).2 °C (36 °F) / -8 °C (18 °F), 7 rain days36 °F (2 °C) / 18 °F (-8 °C), 7 rain daysCrowds: Low
- FebruaryAvoidListed as a month to avoid: Jan–Feb (cold).5 °C (41 °F) / -6 °C (21 °F), 6 rain days41 °F (5 °C) / 21 °F (-6 °C), 6 rain daysCrowds: Low · 1 festival or holiday
- MarchGoodOutside the best window (May–Oct). Across United States: Spring break fills Florida beaches and parks; the desert parks come into season.12 °C (54 °F) / 0 °C (32 °F), 7 rain days54 °F (12 °C) / 32 °F (0 °C), 7 rain daysCrowds: Medium · 2 festivals or holidays
- AprilGoodOutside the best window (May–Oct). Across United States: Good month for the Southwest, Washington cherry blossoms, the South; mountain roads still closed.18 °C (64 °F) / 5 °C (41 °F), 6 rain days64 °F (18 °C) / 41 °F (5 °C), 6 rain daysCrowds: Medium · 1 festival or holiday
- MayGreatInside Jacksonville, Illinois's best window: May–Oct.24 °C (75 °F) / 11 °C (52 °F), 5 rain days75 °F (24 °C) / 52 °F (11 °C), 5 rain daysCrowds: Medium · 1 festival or holiday
- JuneGreatInside Jacksonville, Illinois's best window: May–Oct.28 °C (82 °F) / 15 °C (59 °F), 4 rain days82 °F (28 °C) / 59 °F (15 °C), 4 rain daysCrowds: High
- JulyGreatInside Jacksonville, Illinois's best window: May–Oct.31 °C (88 °F) / 18 °C (64 °F), 4 rain days88 °F (31 °C) / 64 °F (18 °C), 4 rain daysCrowds: High · 1 festival or holiday
- AugustGreatInside Jacksonville, Illinois's best window: May–Oct.30 °C (86 °F) / 17 °C (63 °F), 5 rain days86 °F (30 °C) / 63 °F (17 °C), 5 rain daysCrowds: High
- SeptemberGreatInside Jacksonville, Illinois's best window: May–Oct.26 °C (79 °F) / 13 °C (55 °F), 6 rain days79 °F (26 °C) / 55 °F (13 °C), 6 rain daysCrowds: Medium · 1 festival or holiday
- OctoberGreatInside Jacksonville, Illinois's best window: May–Oct.19 °C (66 °F) / 6 °C (43 °F), 7 rain days66 °F (19 °C) / 43 °F (6 °C), 7 rain daysCrowds: Medium
- NovemberMixedOutside the best window (May–Oct). Across United States: Quiet between holidays; Thanksgiving week is the busiest travel period of the year.11 °C (52 °F) / -1 °C (30 °F), 8 rain days52 °F (11 °C) / 30 °F (-1 °C), 8 rain daysCrowds: Medium · 1 festival or holiday
- DecemberMixedOutside the best window (May–Oct). Across United States: Holiday lights in New York, ski season opens; flights and hotels peak around Christmas and New Year.4 °C (39 °F) / -6 °C (21 °F), 9 rain days39 °F (4 °C) / 21 °F (-6 °C), 9 rain daysCrowds: High · 1 festival or holiday
Compare two months
Weather, crowds and prices for any two months in Jacksonville, Illinois, side by side.
Verdict
May: Great
Jun: Great
Daytime high
May: 24 °C (75 °F)75 °F (24 °C)
Jun: 28 °C (82 °F)82 °F (28 °C)
Night low
May: 11 °C (52 °F)52 °F (11 °C)
Jun: 15 °C (59 °F)59 °F (15 °C)
Rain days
May: 5
Jun: 4 (better)
Crowds
May: Medium
Jun: High
Prices
May: Medium
Jun: High
Festivals listed
May: 1
Jun: 0
May: Inside Jacksonville, Illinois's best window: May–Oct.
June: Inside Jacksonville, Illinois's best window: May–Oct.
Jacksonville, Illinois: figures are long-term averages from this guide, not a forecast.