San Bruno Mountain State Park Rainfall Forecast

  • No Rain
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  • 15%
  • 45%
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San Bruno Mountain State Park Rainfall Statistics

October Rainfall

San Francisco, San Francisco International Airport (5.6 miles)

  • Total Rainfall October

    1in

  • Daily Average October

    0.04in

  • Wettest Day 13 October, 2025

    0.9in

  • Wet Days October

    3/30 (10%)

Climate (2010–Present)

San Francisco, San Francisco International Airport (5.6 miles)

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  • Annual Average 2020–2024

    18.1in

  • Monthly Average 2020–2025

    1.6in

  • Daily Average 2020–2025

    0.1in

  • Wettest Day 24 October, 2021

    4in
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