Yosemite National Park Weather Forecast

    • 48
    • 75

    Rain Likely

    • 46
    • 63

    Rain Likely

    • 47
    • 69

    Slight Chance Thunderstorms

    • 50
    • 71

    Slight Chance Thunderstorms

    • 53
    • 77

    Slight Chance Thunderstorms

    • 50
    • 74

    Chance Rain Showers

    • 48
    • 71

    Mostly Sunny

Today 18 Sep Yosemite NP outside of the valley

Cloudy. A 50 percent chance of rain in the late morning and afternoon. Highs 58 to 72. Southeast Winds up to 10 Mph.

Tonight 18 Sep Yosemite NP outside of the valley

Colder. Rain Showers likely and slight chance of Thunderstorms. Some Thunderstorms may produce heavy rainfall. Lows 40 to 50. Southeast Winds up to 10 Mph. Chance of precipitation 70 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Yosemite National Park Temperature Statistics

September Temperature

Mammoth Yosemite Airport (37.3 miles)

  • Lowest 7 September, 2025

    35.6 °F

  • Average September

    57.6 °F

  • Highest 1 September, 2025

    80.6 °F

Climate (2020–Present)

Mammoth Yosemite Airport (37.3 miles)

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  • Average Low 2020–2025

    29.7 °F

  • Average 2020–2025

    46.2 °F

  • Average High 2020–2025

    61 °F
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