Fontana Weather Forecast

    • 65
    • 88

    Mostly Sunny

    • 71
    • 90

    Mostly Sunny

    • 72
    • 87

    Chance Thunderstorms

    • 70
    • 90

    Thunderstorms Likely

    • 69
    • 88

    Chance Rain Showers

    • 69
    • 87

    Rain Showers Likely

    • 69
    • 85

    Chance Thunderstorms

Today 5 Jul Lebanon

Sunny. Near steady temperature in the mid 80s. South Winds around 5 Mph.

Tonight 5 Jul Lebanon

Mostly clear. Lows in the mid 60s. South Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Fontana Temperature Statistics

July Temperature

Muir Army Air Field / Indiantown (11.2 miles)

  • Lowest 3 July, 2025

    63.7 °F

  • Average July

    76.4 °F

  • Highest 3 July, 2025

    89.6 °F

Climate (2020–Present)

Muir Army Air Field / Indiantown (11.2 miles)

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  • Average Low 2020–2025

    45.6 °F

  • Average 2020–2025

    55 °F

  • Average High 2020–2025

    64.3 °F
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