Steamboat Slough Weather Forecast

    • 44
    • 61

    Rain

    • 51
    • 58

    Chance Rain

    • 52
    • 56

    Rain

    • 52
    • 56

    Rain

    • 51
    • 57

    Rain

    • 48
    • 54

    Rain Likely

Today 17 Dec North Bay Interior Valleys

Becoming partly cloudy in the afternoon. Patchy fog in the morning. Rain likely in the Morning, then a slight chance of rain in the afternoon. Highs in the mid 50s to lower 60s. West Winds 5 to 10 Mph.

Tonight 17 Dec North Bay Interior Valleys

Mostly cloudy. Patchy fog in the Evening, then widespread fog after midnight. Lows in the 40s. Northwest Winds up to 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Steamboat Slough Temperature Statistics

December Temperature

Napa, Napa County Airport (7.5 miles)

  • Lowest 2 December, 2025

    37 °F

  • Average December

    44.5 °F

  • Highest 3 December, 2025

    66 °F

Climate (2020–Present)

Napa, Napa County Airport (7.5 miles)

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  • Average Low 2020–2025

    47 °F

  • Average 2020–2025

    58 °F

  • Average High 2020–2025

    70.1 °F
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