Defiance Weather Forecast

    • 55
    • 77

    Increasing Clouds

    • 64
    • 83

    Rain Showers Likely

    • 64
    • 86

    Rain Showers Likely

    • 70
    • 88

    Partly Sunny

    • 68
    • 89

    Rain Showers Likely

    • 61
    • 81

    Rain Showers Likely

Today 14 May St. Charles

Sunny. Highs in the mid 70s. Southeast Winds 5 to 10 Mph.

Tonight 14 May St. Charles

Partly cloudy in the Evening, then mostly cloudy with a chance of Showers and Thunderstorms after midnight. Not as cool with Lows in the mid 50s. Southeast Winds 5 to 10 Mph. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Defiance Temperature Statistics

May Temperature

St. Louis, Spirit Of St. Louis Airport (6.8 miles)

  • Lowest 7 May, 2026

    36.6 °F

  • Average May

    57.9 °F

  • Highest 4 May, 2026

    81.6 °F

Climate (2021–Present)

St. Louis, Spirit Of St. Louis Airport (6.8 miles)

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  • Average Low 2021–2026

    46 °F

  • Average 2021–2026

    57.4 °F

  • Average High 2021–2026

    68.8 °F
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