Fontana Weather Forecast

    • 24
    • 31

    Cloudy

    • 24
    • 40

    Mostly Cloudy

    • 23
    • 41

    Mostly Cloudy

    • 15
    • 31

    Partly Sunny

    • 27
    • 35

    Mostly Cloudy

    • 31
    • 44

    Chance Rain Showers

    • 26
    • 41

    Slight Chance Rain/Snow

Today 5 Dec Lebanon

Cloudy with a 20 percent chance of snow Showers. Near steady temperature in the upper 20s. East Winds around 5 Mph.

Tonight 5 Dec Lebanon

Cloudy. Lows in the lower 20s. East Winds around 5 Mph this Evening, becoming light and variable.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Fontana Temperature Statistics

December Temperature

Muir Army Air Field / Indiantown (11.2 miles)

  • Lowest 3 December, 2025

    23.9 °F

  • Average December

    34.1 °F

  • Highest 1 December, 2025

    41.5 °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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