Arnold Reservoir Weather Forecast

    • 63
    • 92

    Mostly Sunny

    • 63
    • 91

    Mostly Sunny

    • 62
    • 91

    Mostly Sunny

    • 65
    • 92

    Mostly Sunny

    • 68
    • 97

    Mostly Sunny

    • 68
    • 100

    Hot

Today 27 Jul San Bernardino and Riverside County Valleys-The Inland Empire

Mostly sunny. Highs 96 to 103. Areas of Winds west to 10 Mph. Becoming 10 to 15 Mph with Gusts to 25 Mph this afternoon.

Tonight 27 Jul San Bernardino and Riverside County Valleys-The Inland Empire

Mostly clear. Lows 63 to 69. Areas of Winds west 10 to 15 Mph with Gusts to 25 Mph in the evening becoming light.

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Arnold Reservoir Temperature Statistics

July Temperature

Brackett Field Airport (6.8 miles)

  • Lowest 3 July, 2026

    59 °F

  • Average July

    80.5 °F

  • Highest 15 July, 2026

    98.6 °F

Climate (2021–2026)

Brackett Field Airport (6.8 miles)

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  • Average Low 2021–2026

    56 °F

  • Average 2021–2026

    68 °F

  • Average High 2021–2026

    75.9 °F
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