Keystone Peak Weather Forecast

    • 61
    • 81

    Sunny

    • 61
    • 83

    Mostly Sunny

    • 61
    • 83

    Sunny

    • 61
    • 83

    Mostly Sunny

    • 61
    • 81

    Mostly Sunny

    • 60
    • 80

    Mostly Sunny

Today 31 May Upper Santa Cruz River and Altar Valleys including Nogales

Sunny. Highs 89 to 95.

Tonight 31 May Upper Santa Cruz River and Altar Valleys including Nogales

Clear. Lows 56 to 62.

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Keystone Peak Temperature Statistics

May Temperature

Tucson Ryan Field Airport (18 miles)

  • Lowest 6 May, 2026

    50 °F

  • Average May

    83.3 °F

  • Highest 11 May, 2026

    105.8 °F

Climate (2021–Present)

Tucson Ryan Field Airport (18 miles)

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  • Average Low 2021–2026

    56.8 °F

  • Average 2021–2026

    73.9 °F

  • Average High 2021–2026

    84.3 °F
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