Six Flags - Great America Weather Forecast
- 62
- 79
Mostly Sunny
- 67
- 84
Mostly Sunny
- 70
- 84
Chance Thunderstorms
- 70
- 86
Rain Showers Likely
- 68
- 86
Slight Chance Thunderstorms
- 69
- 86
Slight Chance Thunderstorms
- 69
- 87
Chance Thunderstorms
Today 26 Jul Lake
Sunny. Highs around 80. East Winds 5 to 10 Mph.
Tonight 26 Jul Lake
Mostly clear. Lows in the lower 60s. Southeast Winds 5 to 10 Mph in the Evening, becoming south after midnight.
Six Flags - Great America Temperature Statistics
July Temperature
Chicago/Waukegan Regional Airport (5 miles)
Lowest 1 July, 2024
50.6 °FAverage July
72.7 °FHighest 14 July, 2024
90.6 °F
Climate (2019–Present)
Chicago/Waukegan Regional Airport (5 miles)
Average Low 2019–2024
42.1 °FAverage 2019–2024
50.6 °FAverage High 2019–2024
58.8 °F