Cornerstone Weather Forecast

    • 48
    • 74

    Sunny

    • 51
    • 79

    Sunny

    • 50
    • 78

    Sunny

    • 52
    • 76

    Partly Sunny

    • 46
    • 64

    Chance Rain

    • 47
    • 66

    Mostly Sunny

Today 30 Apr Carquinez Strait and Delta

Sunny. Highs 72 to 78. Northwest Winds 10 to 15 Mph.

Tonight 30 Apr Carquinez Strait and Delta

Clear. Lows around 51. West Winds 10 to 15 Mph. Gusts up to 30 Mph after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Cornerstone Temperature Statistics

April Temperature

Napa, Napa County Airport (7.5 miles)

  • Lowest 6 April, 2024

    33.7 °F

  • Average April

    56.5 °F

  • Highest 10 April, 2024

    78.7 °F

Climate (2019–Present)

Napa, Napa County Airport (7.5 miles)

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  • Average Low 2019–2024

    47 °F

  • Average 2019–2024

    57.7 °F

  • Average High 2019–2024

    70.3 °F
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