Merrimac Weather Forecast

    • 58
    • 66

    Increasing Clouds

    • 60
    • 69

    Mostly Sunny

    • 59
    • 69

    Mostly Sunny

    • 57
    • 69

    Mostly Sunny

    • 58
    • 67

    Mostly Sunny

    • 60
    • 71

    Sunny

Today 22 Jul Western Plumas County/Lassen Park

Sunny. Highs 60 to 75 higher Elevations. 66 to 81 lower Elevations. Prevailing south Winds up to 10 Mph.

Tonight 22 Jul Western Plumas County/Lassen Park

Mostly clear. Lows 44 to 59. Prevailing southwest Winds up to 10 Mph in the evening becoming light.

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Merrimac Temperature Statistics

July Temperature

Oroville Municipal Airport (24.9 miles)

  • Lowest 5 July, 2025

    54.6 °F

  • Average July

    80.6 °F

  • Highest 14 July, 2025

    102.7 °F

Climate (2020–Present)

Oroville Municipal Airport (24.9 miles)

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  • Average Low 2020–2025

    53.1 °F

  • Average 2020–2025

    65.1 °F

  • Average High 2020–2025

    77.3 °F
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