Great Valley Grasslands State Park Weather Forecast

    • 54
    • 85

    Becoming Sunny

    • 51
    • 86

    Sunny

    • 54
    • 84

    Mostly Sunny

    • 49
    • 72

    Slight Chance Rain

    • 49
    • 71

    Partly Sunny

    • 52
    • 77

    Mostly Sunny

    • 53
    • 82

    Mostly Sunny

Today 30 Apr Merced - Madera - Mendota

Mostly sunny. Highs in the mid 80s. Northwest Winds up to 10 Mph.

Tonight 30 Apr Merced - Madera - Mendota

Mostly clear. Lows in the mid 50s. Northwest Winds up to 10 Mph.

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Great Valley Grasslands State Park Temperature Statistics

April Temperature

Merced / Castle Air Force Base (17.4 miles)

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Climate (2020–Present)

Merced / Castle Air Force Base (17.4 miles)

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  • Average Low 2020–2025

    51.3 °F

  • Average 2020–2025

    61.8 °F

  • Average High 2020–2025

    78.4 °F
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