Keystone Peak Weather Forecast

    • 68
    • 88

    Rain Showers Likely

    • 66
    • 82

    Thunderstorms Likely

    • 65
    • 78

    Thunderstorms Likely

    • 67
    • 80

    Chance Thunderstorms

    • 68
    • 82

    Slight Chance Thunderstorms

    • 68
    • 83

    Slight Chance Thunderstorms

    • 69
    • 84

    Chance Thunderstorms

Today 29 Aug Upper Santa Cruz River and Altar Valleys including Nogales

Mostly cloudy with a 30 percent chance of Showers and Thunderstorms. Areas of blowing dust. Some Thunderstorms may produce heavy rainfall. Highs 96 to 101.

Tonight 29 Aug Upper Santa Cruz River and Altar Valleys including Nogales

Showers likely and chance of Thunderstorms in the Evening, then chance of Showers and slight chance of Thunderstorms after midnight. Some Thunderstorms may produce heavy rainfall. Lows 66 to 72. Chance of precipitation 60 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Keystone Peak Temperature Statistics

August Temperature

Tucson Ryan Field Airport (18 miles)

  • Lowest 13 August, 2026

    71.6 °F

  • Average August

    94.5 °F

  • Highest 1 August, 2026

    109.4 °F

Climate (2021–2026)

Tucson Ryan Field Airport (18 miles)

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  • Average Low 2021–2026

    56.9 °F

  • Average 2021–2026

    74.2 °F

  • Average High 2021–2026

    84.7 °F
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