Harry Griffen Regional Park Weather Forecast

    • 66
    • 87

    Slight Chance Thunderstorms

    • 65
    • 85

    Slight Chance Thunderstorms

    • 64
    • 86

    Partly Sunny

    • 64
    • 87

    Partly Sunny

    • 64
    • 86

    Mostly Sunny

    • 65
    • 86

    Mostly Sunny

Today 25 Aug San Diego County Inland Valleys

Partly cloudy. A chance of Showers and a slight chance of Thunderstorms this afternoon. Highs 83 to 88 in the western Valleys to 89 to 94 near the Foothills. Areas of Winds west to 10 Mph. Chance of measurable precipitation 50 percent.

Tonight 25 Aug San Diego County Inland Valleys

Partly cloudy. A slight chance of Showers this evening. Patchy fog overnight. Lows 62 to 66. Areas of Winds west to 10 Mph this evening becoming light. Chance of measurable precipitation 20 percent.

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Harry Griffen Regional Park Temperature Statistics

August Temperature

Gillespie Field Airport (2.5 miles)

  • Lowest 19 August, 2025

    59 °F

  • Average August

    69.9 °F

  • Highest 7 August, 2025

    98.6 °F

Climate (2020–Present)

Gillespie Field Airport (2.5 miles)

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  • Average Low 2020–2025

    52.9 °F

  • Average 2020–2025

    60.2 °F

  • Average High 2020–2025

    76 °F
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