Waterloo Lake Weather Forecast

    • 11
    • 27

    Areas Freezing Fog

    • 20
    • 37

    Areas Freezing Fog

    • 26
    • 41

    Areas Freezing Fog

    • 23
    • 44

    Mostly Cloudy

    • 12
    • 35

    Partly Sunny

    • 18
    • 30

    Partly Sunny

Today 26 Jan Grayson

Sunny. Highs in the mid 20s. West Winds around 5 Mph.

Tonight 26 Jan Grayson

Mostly clear in the Evening, then becoming partly cloudy. Cold with Lows around 10 above. Southwest Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Waterloo Lake Temperature Statistics

January Temperature

Sherman/Denison, Grayson County Airport (5.6 miles)

  • Lowest 18 January, 2026

    14 °F

  • Average January

    45.6 °F

  • Highest 7 January, 2026

    77 °F

Climate (2021–Present)

Sherman/Denison, Grayson County Airport (5.6 miles)

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  • Average Low 2021–2026

    55.4 °F

  • Average 2021–2026

    64.1 °F

  • Average High 2021–2026

    76.4 °F
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