Fairfax Weather Forecast

    • 52
    • 76

    Increasing Clouds

    • 56
    • 77

    Mostly Cloudy

    • 58
    • 77

    Mostly Cloudy

    • 59
    • 85

    Partly Sunny

    • 58
    • 82

    Partly Sunny

    • 57
    • 80

    Partly Sunny

Today 18 Jul North Bay Interior Valleys

Partly cloudy in the morning then becoming sunny. Patchy fog in the morning. Highs in the lower 70s to mid 80s. Southwest Winds 5 to 15 Mph.

Tonight 18 Jul North Bay Interior Valleys

Mostly cloudy. Patchy fog. Lows in the upper 40s to mid 50s. Southwest Winds 5 to 10 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Fairfax Temperature Statistics

July Temperature

Novato / Gnoss Field (10.6 miles)

  • Lowest 1 July, 2026

    50 °F

  • Average July

    65.2 °F

  • Highest 14 July, 2026

    98.6 °F

Climate (2021–2026)

Novato / Gnoss Field (10.6 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    46.8 °F

  • Average 2021–2026

    57.7 °F

  • Average High 2021–2026

    72.5 °F
Get WillyWeather+ to remove ads