Big Morongo Regional Park Weather Forecast

    • 66
    • 83

    Rain Showers

    • 67
    • 85

    Chance Rain Showers

    • 68
    • 87

    Mostly Sunny

    • 70
    • 88

    Slight Chance Rain Showers

    • 73
    • 90

    Slight Chance Thunderstorms

    • 71
    • 90

    Slight Chance Thunderstorms

Today 18 Sep Morongo Basin

Chance of Thunderstorms in the Morning, then Showers likely and chance of Thunderstorms in the afternoon. Highs around 90 in Twentynine Palms. 81 to 84 around yucca valley. Around 85 near Joshua tree. Southeast Winds 5 to 10 Mph. Chance of precipitation 70 percent.

Tonight 18 Sep Morongo Basin

Mostly cloudy with chance of Thunderstorms in the Evening, then partly cloudy with chance of Showers after midnight. Some Thunderstorms may produce heavy rainfall in the evening. Lows 71 to 74 in Twentynine Palms. 65 to 68 around yucca valley and near Joshua tree. South Winds up to 10 Mph shifting to the northeast after midnight. Chance of precipitation 50 percent.

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Big Morongo Regional Park Temperature Statistics

September Temperature

Big Bear City Airport (21.7 miles)

  • Lowest 12 September, 2025

    32 °F

  • Average September

    57.4 °F

  • Highest 1 September, 2025

    78.8 °F

Climate (2020–Present)

Big Bear City Airport (21.7 miles)

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  • Average Low 2020–2025

    34.1 °F

  • Average 2020–2025

    49.3 °F

  • Average High 2020–2025

    60.1 °F
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