Mill Bay Weather Forecast

    • 45
    • 82

    Increasing Clouds

    • 37
    • 63

    Partly Sunny

    • 45
    • 69

    Partly Sunny

    • 44
    • 67

    Rain Showers Likely

    • 47
    • 62

    Chance Rain Showers

    • 51
    • 73

    Chance Rain Showers

    • 52
    • 78

    Slight Chance Rain Showers

Today 20 May Northern Washington

Mostly sunny. Highs around 80. West Winds around 10 Mph with Gusts up to 20 Mph.

Tonight 20 May Northern Washington

Mostly cloudy. Much cooler with Lows in the mid 40s. Northwest Winds 5 to 10 Mph, becoming north after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Mill Bay Temperature Statistics

May Temperature

Middlebury State Airport (21.7 miles)

  • Lowest 9 May, 2026

    31.6 °F

  • Average May

    51.1 °F

  • Highest 18 May, 2026

    86.9 °F

Climate (2021–Present)

Middlebury State Airport (21.7 miles)

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  • Average Low 2021–2026

    36.5 °F

  • Average 2021–2026

    45.6 °F

  • Average High 2021–2026

    54.5 °F
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