Foster City Weather Forecast

    • 55
    • 77

    Mostly Sunny

    • 55
    • 76

    Mostly Sunny

    • 55
    • 75

    Mostly Sunny

    • 54
    • 72

    Partly Sunny

    • 54
    • 70

    Partly Sunny

    • 54
    • 73

    Partly Sunny

    • 54
    • 73

    Mostly Sunny

Today 30 Jun San Francisco Bay Shoreline

Sunny. Highs in the 70s to lower 80s. Northwest Winds 5 to 15 Mph.

Tonight 30 Jun San Francisco Bay Shoreline

Mostly clear in the evening then becoming partly cloudy. A slight chance of drizzle in the evening. Lows in the upper 50s. Northwest Winds 5 to 15 Mph.

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Foster City Temperature Statistics

June Temperature

San Carlos Airport (3.1 miles)

  • Lowest 13 June, 2025

    51.8 °F

  • Average June

    59.2 °F

  • Highest 18 June, 2025

    80.6 °F

Climate (2020–Present)

San Carlos Airport (3.1 miles)

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  • Average Low 2020–2025

    51.2 °F

  • Average 2020–2025

    56.5 °F

  • Average High 2020–2025

    68.3 °F
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