San Mateo Weather Forecast

    • 72
    • 85

    Rain Showers

    • 71
    • 84

    Rain Showers

    • 70
    • 83

    Rain Showers

    • 68
    • 83

    Rain Showers

    • 70
    • 83

    Rain Showers

    • 71
    • 83

    Rain Showers

Today 22 Dec San Juan and Vicinity

Variably cloudy with scattered Showers this Morning, then partly cloudy with isolated Showers this afternoon. Highs around 87. Temperature falling this afternoon. East Winds 10 to 15 Mph. Chance of rain 50 percent.

Tonight 22 Dec San Juan and Vicinity

Variably cloudy with scattered Showers. Lows around 74. Northeast Winds 5 to 10 Mph. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

San Mateo Temperature Statistics

December Temperature

San Juan Fernando Luis Ribas Dominicci (1.9 miles)

  • Lowest 18 December, 2025

    71.6 °F

  • Average December

    81.6 °F

  • Highest 8 December, 2025

    87.8 °F

Climate (2020–Present)

San Juan Fernando Luis Ribas Dominicci (1.9 miles)

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  • Average Low 2020–2025

    77.7 °F

  • Average 2020–2025

    82.5 °F

  • Average High 2020–2025

    85.2 °F
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