Lake Washington Weather Forecast

    • 59
    • 74

    Chance Rain Showers

    • 58
    • 83

    Mostly Sunny

    • 50
    • 81

    Mostly Sunny

    • 47
    • 73

    Mostly Sunny

    • 53
    • 74

    Partly Sunny

    • 58
    • 79

    Partly Sunny

    • 60
    • 83

    Partly Sunny

Today 17 Sep Orange

Mostly cloudy with a chance of Showers with a slight chance of Thunderstorms. Highs in the lower 70s. East Winds around 5 Mph. Chance of rain 50 percent.

Tonight 17 Sep Orange

Mostly cloudy. A chance of Showers with a slight chance of Thunderstorms in the Evening, then a chance of Showers after midnight. Patchy fog. Lows in the upper 50s. Northeast Winds around 5 Mph. Chance of rain 40 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Washington Temperature Statistics

September Temperature

Newburgh / Stewart (1.2 miles)

  • Lowest 8 September, 2025

    46.4 °F

  • Average September

    66 °F

  • Highest 4 September, 2025

    80.6 °F

Climate (2020–Present)

Newburgh / Stewart (1.2 miles)

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  • Average Low 2020–2025

    43.8 °F

  • Average 2020–2025

    52.7 °F

  • Average High 2020–2025

    61.5 °F
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