Martin Lake Weather Forecast

    • 54
    • 77

    Decreasing Clouds

    • 61
    • 82

    Mostly Sunny

    • 65
    • 88

    Mostly Sunny

    • 70
    • 93

    Slight Chance Thunderstorms

    • 67
    • 99

    Hot

    • 64
    • 95

    Mostly Sunny

Today 21 Jul McHenry

Partly sunny. Highs in the upper 70s. North Winds 10 to 15 Mph.

Tonight 21 Jul McHenry

Mostly cloudy. Patchy fog. Lows in the upper 50s. Northwest Winds 5 to 10 Mph with Gusts up to 20 Mph.

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Martin Lake Temperature Statistics

July Temperature

Harvey Municipal Airport (23.6 miles)

  • Lowest 8 July, 2026

    51.8 °F

  • Average July

    72.7 °F

  • Highest 12 July, 2026

    93.2 °F

Climate (2021–2026)

Harvey Municipal Airport (23.6 miles)

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  • Average Low 2021–2026

    30.3 °F

  • Average 2021–2026

    41.2 °F

  • Average High 2021–2026

    51.8 °F
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