San Ysidro Weather Forecast

    • 60
    • 69

    Patchy Fog

    • 61
    • 75

    Partly Sunny

    • 63
    • 75

    Mostly Cloudy

    • 62
    • 73

    Slight Chance Rain Showers

    • 59
    • 68

    Mostly Cloudy

    • 57
    • 66

    Mostly Cloudy

Today 29 May San Diego County Coastal Areas

Mostly cloudy this morning. Becoming partly cloudy. Patchy fog this morning. Highs around 70 near the coast to 73 inland. Areas of Winds west to 10 Mph.

Tonight 29 May San Diego County Coastal Areas

Partly cloudy. Patchy fog overnight. Lows 56 to 60. Light Winds.

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San Ysidro Temperature Statistics

May Temperature

San Diego, Brown Field Municipal Airport (3.1 miles)

  • Lowest 14 May, 2025

    48.7 °F
  • Average May

    64.5 °F
  • Highest 10 May, 2025

    92.6 °F

Climate (2020–Present)

San Diego, Brown Field Municipal Airport (3.1 miles)

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  • Average Low 2020–2025

    54.1 °F
  • Average 2020–2025

    63.4 °F
  • Average High 2020–2025

    73.9 °F
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