National City Weather Forecast

    • 68
    • 81

    Chance Rain Showers

    • 74
    • 89

    Rain Showers Likely

    • 77
    • 96

    Mostly Sunny

    • 79
    • 101

    Hot

    • 75
    • 97

    Hot

    • 73
    • 93

    Slight Chance Thunderstorms

Today 24 Jul St. Clair

Partly sunny this Morning, then mostly cloudy with a chance of Showers this afternoon. Highs in the upper 70s. Southeast Winds around 5 Mph. Chance of rain 50 percent.

Tonight 24 Jul St. Clair

Mostly cloudy with a chance of Showers with a slight chance of Thunderstorms. Lows in the upper 60s. Southeast Winds around 5 Mph. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

National City Temperature Statistics

July Temperature

St. Louis Downtown Airport (5.6 miles)

  • Lowest 13 July, 2026

    67.6 °F

  • Average July

    81.4 °F

  • Highest 2 July, 2026

    96.7 °F

Climate (2021–2026)

St. Louis Downtown Airport (5.6 miles)

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  • Average Low 2021–2026

    47.7 °F

  • Average 2021–2026

    58.5 °F

  • Average High 2021–2026

    69.3 °F
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