Perris Reservoir Weather Forecast

    • 63
    • 94

    Sunny

    • 65
    • 94

    Mostly Sunny

    • 69
    • 97

    Hot

    • 71
    • 100

    Hot

    • 71
    • 102

    Hot

    • 70
    • 101

    Hot

Today 18 Aug San Bernardino and Riverside County Valleys-The Inland Empire

Mostly sunny. Highs 89 to 97. Light Winds becoming west 10 to 15 Mph in the afternoon.

Tonight 18 Aug San Bernardino and Riverside County Valleys-The Inland Empire

Clear. Lows 59 to 65. Areas of Winds west 10 to 15 Mph in the evening becoming light.

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Perris Reservoir Temperature Statistics

August Temperature

Riverside / March Air Force Base (5 miles)

  • Lowest 2 August, 2025

    58.6 °F

  • Average August

    79.2 °F

  • Highest 7 August, 2025

    104.9 °F

Climate (2020–Present)

Riverside / March Air Force Base (5 miles)

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  • Average Low 2020–2025

    52.3 °F

  • Average 2020–2025

    65.4 °F

  • Average High 2020–2025

    78.6 °F
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