Fontana Weather Forecast

    • 28
    • 34

    Increasing Clouds

    • 23
    • 43

    Partly Sunny

    • 7
    • 30

    Mostly Cloudy

    • 10
    • 17

    Snow Likely

    • 7
    • 19

    Snow Likely

    • 8
    • 22

    Partly Sunny

Today 21 Jan Lebanon

Mostly sunny in the Morning, then becoming mostly cloudy. Not as cool with Highs in the lower 30s. South Winds 10 to 15 Mph with Gusts up to 25 Mph. Wind chill Values as low as 1 above in the morning.

Tonight 21 Jan Lebanon

Mostly cloudy. Not as cool with Lows in the upper 20s. South Winds 5 to 10 Mph with Gusts up to 20 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Fontana Temperature Statistics

January Temperature

Muir Army Air Field / Indiantown (11.2 miles)

  • Lowest 16 January, 2026

    19.2 °F

  • Average January

    33.6 °F

  • Highest 8 January, 2026

    55.6 °F

Climate (2021–Present)

Muir Army Air Field / Indiantown (11.2 miles)

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  • Average Low 2021–2026

    45.2 °F

  • Average 2021–2026

    54.7 °F

  • Average High 2021–2026

    64 °F
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