Fontana Weather Forecast

    • 63
    • 84

    Chance Rain Showers

    • 66
    • 87

    Rain Showers Likely

    • 64
    • 81

    Rain Showers

    • 63
    • 81

    Chance Thunderstorms

    • 62
    • 82

    Slight Chance Thunderstorms

    • 65
    • 85

    Partly Sunny

Today 26 Jul Lebanon

Mostly sunny. A slight chance of Showers and Thunderstorms this afternoon. Highs in the lower 80s. Southeast Winds around 5 Mph. Chance of rain 20 percent.

Tonight 26 Jul Lebanon

Partly cloudy with a chance of Showers and Thunderstorms in the Evening, then mostly clear after midnight. Lows in the lower 60s. Southwest Winds around 5 Mph in the Evening, becoming light and variable. Chance of rain 40 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Fontana Temperature Statistics

July Temperature

Muir Army Air Field / Indiantown (11.2 miles)

  • Lowest 20 July, 2026

    55.2 °F

  • Average July

    78.4 °F

  • Highest 2 July, 2026

    103.3 °F

Climate (2021–2026)

Muir Army Air Field / Indiantown (11.2 miles)

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  • Average Low 2021–2026

    45.3 °F

  • Average 2021–2026

    54.8 °F

  • Average High 2021–2026

    64.1 °F
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