When to go · Decatur, Illinois
Decatur, Illinois, month by month
The best months for Decatur, Illinois: May, Jun, Jul, Aug, Sep, Oct. Months to avoid: Jan, Feb.
Month by month
- JanuaryAvoidListed as a month to avoid: Jan–Feb (cold, limited outdoor activities).-1 °C (30 °F) / -9 °C (16 °F), 8 rain days30 °F (-1 °C) / 16 °F (-9 °C), 8 rain daysCrowds: Low
- FebruaryAvoidListed as a month to avoid: Jan–Feb (cold, limited outdoor activities).2 °C (36 °F) / -7 °C (19 °F), 7 rain days36 °F (2 °C) / 19 °F (-7 °C), 7 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.10 °C (50 °F) / 0 °C (32 °F), 6 rain days50 °F (10 °C) / 32 °F (0 °C), 6 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) / 6 °C (43 °F), 6 rain days64 °F (18 °C) / 43 °F (6 °C), 6 rain daysCrowds: Medium · 1 festival or holiday
- MayGreatInside Decatur, Illinois's best window: May–Oct.24 °C (75 °F) / 12 °C (54 °F), 7 rain days75 °F (24 °C) / 54 °F (12 °C), 7 rain daysCrowds: Medium · 1 festival or holiday
- JuneGreatInside Decatur, Illinois's best window: May–Oct.29 °C (84 °F) / 18 °C (64 °F), 8 rain days84 °F (29 °C) / 64 °F (18 °C), 8 rain daysCrowds: High
- JulyGreatInside Decatur, Illinois's best window: May–Oct.32 °C (90 °F) / 22 °C (72 °F), 7 rain days90 °F (32 °C) / 72 °F (22 °C), 7 rain daysCrowds: High · 1 festival or holiday
- AugustGreatInside Decatur, Illinois's best window: May–Oct.31 °C (88 °F) / 21 °C (70 °F), 8 rain days88 °F (31 °C) / 70 °F (21 °C), 8 rain daysCrowds: High
- SeptemberGreatInside Decatur, Illinois's best window: May–Oct.26 °C (79 °F) / 15 °C (59 °F), 7 rain days79 °F (26 °C) / 59 °F (15 °C), 7 rain daysCrowds: Medium · 1 festival or holiday
- OctoberGreatInside Decatur, Illinois's best window: May–Oct.19 °C (66 °F) / 9 °C (48 °F), 7 rain days66 °F (19 °C) / 48 °F (9 °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.12 °C (54 °F) / 3 °C (37 °F), 8 rain days54 °F (12 °C) / 37 °F (3 °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) / -2 °C (28 °F), 9 rain days39 °F (4 °C) / 28 °F (-2 °C), 9 rain daysCrowds: High · 1 festival or holiday
Compare two months
Weather, crowds and prices for any two months in Decatur, Illinois, side by side.
Verdict
May: Great
Jun: Great
Daytime high
May: 24 °C (75 °F)75 °F (24 °C)
Jun: 29 °C (84 °F)84 °F (29 °C)
Night low
May: 12 °C (54 °F)54 °F (12 °C)
Jun: 18 °C (64 °F)64 °F (18 °C)
Rain days
May: 7 (better)
Jun: 8
Crowds
May: Medium
Jun: High
Prices
May: Medium
Jun: High
Festivals listed
May: 1
Jun: 0
May: Inside Decatur, Illinois's best window: May–Oct.
June: Inside Decatur, Illinois's best window: May–Oct.
Decatur, Illinois: figures are long-term averages from this guide, not a forecast.