When to go · Vandalia, Illinois
Vandalia, Illinois, month by month
The best months for Vandalia, Illinois: May, Jun, Jul, Aug, Sep, Oct. Months to avoid: Jan, Feb, Mar, Apr, Nov, Dec.
Month by month
- JanuaryAvoidListed as a month to avoid: Nov–Apr (cold, limited hours).4 °C (39 °F) / -7 °C (19 °F), 6 rain days39 °F (4 °C) / 19 °F (-7 °C), 6 rain daysCrowds: Low
- FebruaryAvoidListed as a month to avoid: Nov–Apr (cold, limited hours).6 °C (43 °F) / -6 °C (21 °F), 6 rain days43 °F (6 °C) / 21 °F (-6 °C), 6 rain daysCrowds: Low · 1 festival or holiday
- MarchAvoidListed as a month to avoid: Nov–Apr (cold, limited hours).12 °C (54 °F) / -1 °C (30 °F), 7 rain days54 °F (12 °C) / 30 °F (-1 °C), 7 rain daysCrowds: Medium · 2 festivals or holidays
- AprilAvoidListed as a month to avoid: Nov–Apr (cold, limited hours).18 °C (64 °F) / 4 °C (39 °F), 7 rain days64 °F (18 °C) / 39 °F (4 °C), 7 rain daysCrowds: Medium · 1 festival or holiday
- MayGreatInside Vandalia, Illinois's best window: May–Oct.24 °C (75 °F) / 10 °C (50 °F), 8 rain days75 °F (24 °C) / 50 °F (10 °C), 8 rain daysCrowds: Medium · 1 festival or holiday
- JuneGreatInside Vandalia, Illinois's best window: May–Oct.29 °C (84 °F) / 15 °C (59 °F), 9 rain days84 °F (29 °C) / 59 °F (15 °C), 9 rain daysCrowds: High
- JulyGreatInside Vandalia, Illinois's best window: May–Oct.33 °C (91 °F) / 19 °C (66 °F), 9 rain days91 °F (33 °C) / 66 °F (19 °C), 9 rain daysCrowds: High · 1 festival or holiday
- AugustGreatInside Vandalia, Illinois's best window: May–Oct.32 °C (90 °F) / 18 °C (64 °F), 8 rain days90 °F (32 °C) / 64 °F (18 °C), 8 rain daysCrowds: High
- SeptemberGreatInside Vandalia, Illinois's best window: May–Oct.27 °C (81 °F) / 13 °C (55 °F), 7 rain days81 °F (27 °C) / 55 °F (13 °C), 7 rain daysCrowds: Medium · 1 festival or holiday
- OctoberGreatInside Vandalia, Illinois's best window: May–Oct.20 °C (68 °F) / 6 °C (43 °F), 8 rain days68 °F (20 °C) / 43 °F (6 °C), 8 rain daysCrowds: Medium
- NovemberAvoidListed as a month to avoid: Nov–Apr (cold, limited hours).12 °C (54 °F) / -1 °C (30 °F), 7 rain days54 °F (12 °C) / 30 °F (-1 °C), 7 rain daysCrowds: Medium · 1 festival or holiday
- DecemberAvoidListed as a month to avoid: Nov–Apr (cold, limited hours).6 °C (43 °F) / -5 °C (23 °F), 7 rain days43 °F (6 °C) / 23 °F (-5 °C), 7 rain daysCrowds: High · 1 festival or holiday
Compare two months
Weather, crowds and prices for any two months in Vandalia, 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: 10 °C (50 °F)50 °F (10 °C)
Jun: 15 °C (59 °F)59 °F (15 °C)
Rain days
May: 8 (better)
Jun: 9
Crowds
May: Medium
Jun: High
Prices
May: Medium
Jun: High
Festivals listed
May: 1
Jun: 0
May: Inside Vandalia, Illinois's best window: May–Oct.
June: Inside Vandalia, Illinois's best window: May–Oct.
Vandalia, Illinois: figures are long-term averages from this guide, not a forecast.