Winchester Weather Forecast

    • 54
    • 83

    Mostly Sunny

    • 56
    • 83

    Mostly Sunny

    • 58
    • 88

    Mostly Sunny

    • 60
    • 90

    Sunny

    • 61
    • 92

    Sunny

    • 64
    • 95

    Mostly Sunny

Today 11 Sep San Bernardino and Riverside County Valleys-The Inland Empire

Partly cloudy with patchy fog this morning. Becoming sunny. Highs 79 to 84. Light Winds becoming west 10 to 15 Mph with Gusts to 25 Mph this afternoon.

Tonight 11 Sep San Bernardino and Riverside County Valleys-The Inland Empire

Clear in the evening. Becoming partly cloudy overnight with patchy fog. Lows 50 to 57. Areas of Winds southwest 10 to 15 Mph in the evening becoming light.

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Winchester Temperature Statistics

September Temperature

Murrieta/Temecula French Valley (9.3 miles)

  • Lowest 9 September, 2025

    55.4 °F

  • Average September

    79 °F

  • Highest 2 September, 2025

    102.2 °F

Climate (2020–Present)

Murrieta/Temecula French Valley (9.3 miles)

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  • Average Low 2020–2025

    50.6 °F

  • Average 2020–2025

    62.8 °F

  • Average High 2020–2025

    77.8 °F
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