South San Ysidro Weather Forecast

    • 54
    • 84

    Chance Thunderstorms

    • 51
    • 85

    Mostly Sunny

    • 58
    • 87

    Mostly Sunny

    • 55
    • 86

    Slight Chance Thunderstorms

    • 56
    • 86

    Chance Thunderstorms

    • 53
    • 83

    Chance Rain Showers

    • 52
    • 80

    Chance Thunderstorms

Today 9 Sep Glorieta Mesa Including Glorieta Pass

Partly cloudy with a chance of Showers and Thunderstorms. Highs in the mid 80s. Temperature falling into the upper 70s this afternoon. Chance of rain 50 percent.

Tonight 9 Sep Glorieta Mesa Including Glorieta Pass

Partly cloudy with a slight chance of Showers and Thunderstorms in the Evening, then mostly clear after midnight. Lows in the mid 50s. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

South San Ysidro Temperature Statistics

September Temperature

Las Vegas Municipal Airport (28.6 miles)

  • Lowest 3 September, 2026

    54.6 °F

  • Average September

    72 °F

  • Highest 6 September, 2026

    87.7 °F

Climate (2021–2026)

Las Vegas Municipal Airport (28.6 miles)

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  • Average Low 2021–2026

    38.2 °F

  • Average 2021–2026

    52.4 °F

  • Average High 2021–2026

    66.9 °F
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