Fontana Weather Forecast

    • 33
    • 52

    Decreasing Clouds

    • 45
    • 61

    Rain Showers Likely

    • 43
    • 61

    Partly Sunny

    • 44
    • 68

    Rain Showers Likely

    • 28
    • 54

    Partly Sunny

    • 32
    • 47

    Mostly Cloudy

    • 34
    • 50

    Mostly Cloudy

Today 19 Mar Lebanon

Mostly cloudy and not as cool. Near steady temperature in the lower 50s. Southwest Winds 5 to 10 Mph.

Tonight 19 Mar Lebanon

Mostly cloudy this Evening, then clearing. Lows in the lower 30s. West Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Fontana Temperature Statistics

March Temperature

Muir Army Air Field / Indiantown (11.2 miles)

  • Lowest 2 March, 2026

    20.7 °F

  • Average March

    45.4 °F

  • Highest 10 March, 2026

    81.1 °F

Climate (2021–Present)

Muir Army Air Field / Indiantown (11.2 miles)

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  • Average Low 2021–2026

    45.1 °F

  • Average 2021–2026

    54.6 °F

  • Average High 2021–2026

    64 °F
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