Marcellus Weather Forecast

    • 18
    • 33

    Mostly Sunny

    • 18
    • 31

    Mostly Sunny

    • 21
    • 33

    Partly Sunny

    • 24
    • 34

    Mostly Cloudy

    • 27
    • 38

    Mostly Cloudy

    • 29
    • 41

    Mostly Cloudy

Today 23 Jan Upper Columbia Basin

Sunny. Highs in the lower to mid 30s. Northeast wind 5 to 15 Mph.

Tonight 23 Jan Upper Columbia Basin

Mostly clear. Lows 18 to 21. North wind 5 to 10 Mph in the Evening, becoming light and variable.

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Marcellus Temperature Statistics

January Temperature

Grant County Airport (42.3 miles)

  • Lowest 1 January, 2026

    18 °F

  • Average January

    33.6 °F

  • Highest 12 January, 2026

    51.1 °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

    64.2 °F
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