Fontana Weather Forecast

    • 47
    • 75

    Chance Rain Showers

    • 42
    • 66

    Partly Sunny

    • 48
    • 66

    Rain Showers Likely

    • 49
    • 65

    Rain Showers

    • 48
    • 65

    Rain Showers Likely

    • 50
    • 70

    Slight Chance Rain Showers

Today 10 May Lebanon

Partly sunny. A chance of Showers with a slight chance of Thunderstorms in the afternoon. Warmer with Highs in the mid 70s. West Winds 5 to 10 Mph. Chance of rain 30 percent.

Tonight 10 May Lebanon

Partly cloudy. Areas of fog. Lows in the upper 40s. Southeast Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Fontana Temperature Statistics

May Temperature

Muir Army Air Field / Indiantown (11.2 miles)

  • Lowest 4 May, 2026

    40.8 °F

  • Average May

    61.1 °F

  • Highest 5 May, 2026

    86.5 °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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