Marcellus Weather Forecast

    • 45
    • 75

    Blowing Dust

    • 51
    • 75

    Partly Sunny

    • 46
    • 79

    Partly Sunny

    • 49
    • 77

    Mostly Sunny

    • 53
    • 85

    Partly Sunny

    • 50
    • 80

    Mostly Sunny

Today 8 May Upper Columbia Basin

Mostly cloudy. Patchy blowing dust in the afternoon. Highs in the mid to upper 70s. Breezy. Southwest wind 10 to 20 Mph. Gusts up to 25 Mph increasing to 35 Mph in the afternoon.

Tonight 8 May Upper Columbia Basin

Patchy blowing dust in the evening. Mostly clear. Lows in the 40s. Windy. West wind 15 to 25 Mph with Gusts up to 40 Mph decreasing to 5 to 15 Mph with Gusts up to 30 Mph overnight.

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Marcellus Temperature Statistics

May Temperature

Grant County Airport (42.3 miles)

  • Lowest 1 May, 2026

    38.6 °F

  • Average May

    67.1 °F

  • Highest 4 May, 2026

    89.7 °F

Climate (2021–Present)

Grant County Airport (42.3 miles)

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  • Average Low 2021–2026

    41 °F

  • Average 2021–2026

    52.8 °F

  • Average High 2021–2026

    64.3 °F
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