Glen Helen Regional Park Weather Forecast

    • 72
    • 99

    Chance Thunderstorms

    • 72
    • 99

    Chance Thunderstorms

    • 69
    • 96

    Slight Chance Thunderstorms

    • 66
    • 93

    Slight Chance Thunderstorms

    • 65
    • 92

    Slight Chance Thunderstorms

    • 64
    • 91

    Mostly Sunny

Today 23 Aug San Bernardino and Riverside County Valleys-The Inland Empire

Partly cloudy with a chance of Showers and Thunderstorms. Highs 97 to 103. Areas of Winds west to 10 Mph becoming 10 to 15 Mph this afternoon. Chance of measurable precipitation 50 percent.

Tonight 23 Aug San Bernardino and Riverside County Valleys-The Inland Empire

Partly cloudy. A slight chance of Showers and Thunderstorms in the evening. Lows 68 to 73. Areas of Winds west to 10 Mph in the evening becoming light. Chance of measurable precipitation 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Glen Helen Regional Park Temperature Statistics

August Temperature

San Bernardino Intl. Airport (11.8 miles)

  • Lowest 18 August, 2025

    60.8 °F

  • Average August

    75.8 °F

  • Highest 7 August, 2025

    105.8 °F

Climate (2020–Present)

San Bernardino Intl. Airport (11.8 miles)

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  • Average Low 2020–2025

    54.1 °F

  • Average 2020–2025

    63.2 °F

  • Average High 2020–2025

    80.5 °F
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