Fontana Weather Forecast

    • 65
    • 81

    Chance Rain Showers

    • 66
    • 88

    Partly Sunny

    • 71
    • 90

    Partly Sunny

    • 75
    • 98

    Slight Chance Thunderstorms

    • 76
    • 102

    Hot

    • 74
    • 100

    Partly Sunny

Today 28 Jun Lebanon

Mostly cloudy in the Morning, then becoming partly sunny. A chance of Showers. A chance of Thunderstorms in the afternoon. Humid with Highs in the lower 80s. East Winds around 5 Mph. Chance of rain 50 percent.

Tonight 28 Jun Lebanon

Mostly cloudy with a 20 percent chance of Showers. Areas of fog. Near steady temperature in the mid 60s. Northeast Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Fontana Temperature Statistics

June Temperature

Muir Army Air Field / Indiantown (11.2 miles)

  • Lowest 2 June, 2026

    53.8 °F

  • Average June

    74 °F

  • Highest 12 June, 2026

    95 °F

Climate (2021–2026)

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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