Riverview Weather Forecast

    • 73
    • 100

    Thunderstorms Likely

    • 76
    • 96

    Slight Chance Thunderstorms

    • 74
    • 97

    Hot

    • 74
    • 96

    Mostly Sunny

    • 71
    • 96

    Partly Sunny

    • 67
    • 90

    Chance Rain Showers

Today 15 Sep St. Louis City

Sunny. A chance of Showers and Thunderstorms in the afternoon. Warmer with Highs in the upper 90s. Southwest Winds 5 to 10 Mph. Chance of rain 50 percent. Heat index Values up to 110.

Tonight 15 Sep St. Louis City

Mostly cloudy with a chance of Thunderstorms. Showers Likely, mainly in the evening. Humid with Lows in the lower 70s. East Winds around 5 Mph. Chance of rain 70 percent. Heat index Values up to 104 early in the evening.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Riverview Temperature Statistics

September Temperature

St. Louis Lambert International Airport (9.9 miles)

  • Lowest 7 September, 2026

    65.6 °F

  • Average September

    84.2 °F

  • Highest 5 September, 2026

    101.6 °F

Climate (2021–2026)

St. Louis Lambert International Airport (9.9 miles)

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  • Average Low 2021–2026

    50.7 °F

  • Average 2021–2026

    60.2 °F

  • Average High 2021–2026

    69.7 °F
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