Fallon Weather Forecast

    • 46
    • 68

    Patchy Fog

    • 48
    • 63

    Increasing Clouds

    • 48
    • 63

    Mostly Cloudy

    • 46
    • 62

    Patchy Fog

    • 47
    • 62

    Partly Sunny

    • 48
    • 65

    Mostly Sunny

    • 48
    • 68

    Mostly Sunny

Today 21 May Coastal North Bay Including Point Reyes National Seashore

Sunny. Highs in the 60s to lower 70s. West Winds around 5 Mph.

Tonight 21 May Coastal North Bay Including Point Reyes National Seashore

Partly cloudy in the evening then becoming mostly cloudy. Patchy fog. Lows in the upper 40s. West Winds around 5 Mph in the evening. Becoming light.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Fallon Temperature Statistics

May Temperature

Santa Rosa, Santa Rosa Sonoma County Airport (16.2 miles)

  • Lowest 13 May, 2026

    44.7 °F

  • Average May

    63.3 °F

  • Highest 19 May, 2026

    88 °F

Climate (2021–Present)

Santa Rosa, Santa Rosa Sonoma County Airport (16.2 miles)

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  • Average Low 2021–2026

    45.9 °F

  • Average 2021–2026

    58.4 °F

  • Average High 2021–2026

    72.8 °F
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