Petrified Forest National Park Weather Forecast

    • 68
    • 99

    Slight Chance Thunderstorms

    • 67
    • 97

    Chance Thunderstorms

    • 65
    • 95

    Chance Thunderstorms

    • 65
    • 93

    Slight Chance Thunderstorms

    • 64
    • 93

    Slight Chance Thunderstorms

    • 65
    • 93

    Partly Sunny

Today 19 Aug Little Colorado River Valley in Apache County

Mostly sunny in the late morning and early afternoon then becoming partly cloudy. A slight chance of through the day. Highs 91 to 97. Light Winds becoming northwest around 15 Mph late in the afternoon.

Tonight 19 Aug Little Colorado River Valley in Apache County

Mostly cloudy with a 10 percent chance of Thunderstorms in the evening. Partly cloudy after midnight. Lows around 64. Southwest Winds around 15 Mph early in the evening becoming light.

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Petrified Forest National Park Temperature Statistics

August Temperature

St. Johns, St. Johns Industrial Airpark (36 miles)

  • Lowest 15 August, 2026

    56.6 °F

  • Average August

    78.6 °F

  • Highest 1 August, 2026

    99.6 °F

Climate (2021–2026)

St. Johns, St. Johns Industrial Airpark (36 miles)

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  • Average Low 2021–2026

    38.9 °F

  • Average 2021–2026

    55.2 °F

  • Average High 2021–2026

    71.4 °F
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