Six Flags - St. Louis Weather Forecast
- 56
- 82
Chance Thunderstorms
- 47
- 75
Sunny
- 54
- 76
Chance Thunderstorms
- 64
- 86
Chance Thunderstorms
- 65
- 89
Chance Rain Showers
- 69
- 90
Chance Thunderstorms
Today 12 May St. Louis
Sunny. Highs in the lower 80s. Southwest Winds 10 to 15 Mph.
Tonight 12 May St. Louis
Mostly clear. Lows in the lower 50s. Southeast Winds around 5 Mph.
Six Flags - St. Louis Temperature Statistics
May Temperature
St. Louis, Spirit Of St. Louis Airport (9.9 miles)
Lowest 7 May, 2026
36.6 °FAverage May
57.5 °FHighest 4 May, 2026
81.6 °F
Climate (2021–Present)
St. Louis, Spirit Of St. Louis Airport (9.9 miles)
Average Low 2021–2026
46 °FAverage 2021–2026
57.4 °FAverage High 2021–2026
68.8 °F