Castro City Weather Forecast

    • 52
    • 72

    Rain Showers Likely

    • 52
    • 73

    Chance Rain Showers

    • 52
    • 70

    Partly Sunny

    • 50
    • 72

    Mostly Sunny

    • 52
    • 78

    Mostly Sunny

    • 55
    • 81

    Mostly Sunny

Today 27 May San Francisco Bay Shoreline

Partly cloudy. Highs in the mid 60s to lower 70s. Southwest Winds around 5 Mph increasing to west 10 to 20 Mph in the afternoon.

Tonight 27 May San Francisco Bay Shoreline

Mostly cloudy. A slight chance of Showers in the Evening, then a chance of Showers after midnight. Lows in the lower 50s. Southwest Winds 5 to 15 Mph. Becoming south 5 to 10 Mph after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Castro City Temperature Statistics

May Temperature

Palo Alto Airport (4.3 miles)

  • Lowest 4 May, 2026

    48.2 °F

  • Average May

    63.8 °F

  • Highest 19 May, 2026

    86 °F

Climate (2021–Present)

Palo Alto Airport (4.3 miles)

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  • Average Low 2021–2026

    51.1 °F

  • Average 2021–2026

    60.6 °F

  • Average High 2021–2026

    67.4 °F
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