Downtown (South San Francisco) Weather Forecast

    • 48
    • 62

    Rain

    • 51
    • 60

    Chance Rain

    • 53
    • 61

    Rain

    • 53
    • 59

    Rain Likely

    • 53
    • 60

    Rain

    • 49
    • 58

    Rain Likely

Today 17 Dec San Francisco Bay Shoreline

Mostly cloudy. A slight chance of rain. Highs in the lower 60s. Northwest Winds 5 to 10 Mph.

Tonight 17 Dec San Francisco Bay Shoreline

Partly cloudy in the evening then becoming mostly cloudy. Patchy fog in the Evening, then Areas of dense fog after midnight. Lows in the upper 40s. West Winds 5 to 10 Mph becoming southeast after midnight.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Downtown (South San Francisco) Temperature Statistics

December Temperature

San Francisco, San Francisco International Airport (3.1 miles)

  • Lowest 15 December, 2025

    44.1 °F

  • Average December

    49.6 °F

  • Highest 3 December, 2025

    63 °F

Climate (2020–Present)

San Francisco, San Francisco International Airport (3.1 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2020–2025

    52.3 °F

  • Average 2020–2025

    58.3 °F

  • Average High 2020–2025

    66.5 °F
Get WillyWeather+ to remove ads