San Francisco Bay - Hercules, Refugio Landing Weather Forecast

    • 59
    • 75

    Mostly Sunny

    • 59
    • 77

    Partly Sunny

    • 59
    • 73

    Mostly Sunny

    • 58
    • 69

    Partly Sunny

    • 58
    • 68

    Mostly Sunny

    • 58
    • 66

    Mostly Sunny

Today 20 Aug East Bay Interior Valleys

Sunny. Highs in the mid 90s. West Winds 5 to 10 Mph increasing to 10 to 20 Mph in the afternoon.

Tonight 20 Aug East Bay Interior Valleys

Clear. Lows in the lower 60s. Southwest Winds 10 to 20 Mph. Becoming 5 to 10 Mph after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

San Francisco Bay - Hercules, Refugio Landing Temperature Statistics

August Temperature

Napa, Napa County Airport (12.4 miles)

  • Lowest 18 August, 2025

    50 °F

  • Average August

    66.9 °F

  • Highest 6 August, 2025

    88.6 °F

Climate (2020–Present)

Napa, Napa County Airport (12.4 miles)

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  • Average Low 2020–2025

    46.9 °F

  • Average 2020–2025

    58.1 °F

  • Average High 2020–2025

    70.5 °F
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