Waterloo Lake Weather Forecast

    • 54
    • 69

    Increasing Clouds

    • 57
    • 73

    Mostly Cloudy

    • 58
    • 75

    Partly Sunny

    • 45
    • 75

    Partly Sunny

    • 44
    • 61

    Partly Sunny

    • 40
    • 64

    Slight Chance Rain Showers

    • 37
    • 60

    Mostly Sunny

Today 16 Feb Grayson

Sunny. Highs in the upper 60s. South Winds around 10 Mph.

Tonight 16 Feb Grayson

Mostly clear in the Evening, then becoming partly cloudy. Not as cool with Lows in the lower 50s. South Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Waterloo Lake Temperature Statistics

February Temperature

Sherman/Denison, Grayson County Airport (5.6 miles)

  • Lowest 1 February, 2026

    19.8 °F

  • Average February

    52.1 °F

  • Highest 6 February, 2026

    80.6 °F

Climate (2021–Present)

Sherman/Denison, Grayson County Airport (5.6 miles)

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  • Average Low 2021–2026

    55.5 °F

  • Average 2021–2026

    64.2 °F

  • Average High 2021–2026

    76.5 °F
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