Mastodon State Park Weather Forecast
- 76
- 99
Hot
- 77
- 99
Hot
- 77
- 99
Hot
- 77
- 99
Hot
- 73
- 99
Hot
- 71
- 96
Partly Sunny
Today 1 Sep Jefferson
Sunny, hot with Highs in the upper 90s. Southwest Winds around 5 Mph. Heat index Values up to 105.
Tonight 1 Sep Jefferson
Clear. Lows in the mid 70s. South Winds around 5 Mph. Heat index Values up to 102 early in the evening.
Mastodon State Park Temperature Statistics
September Temperature
St. Louis Downtown Airport (18.6 miles)
Lowest
–Average September
–Highest
–
Climate (2021–2026)
St. Louis Downtown Airport (18.6 miles)
Average Low 2021–2026
47.7 °FAverage 2021–2026
58.5 °FAverage High 2021–2026
69.3 °F