Lake Chaplain Weather Forecast

    • 47
    • 61

    Rain

    • 44
    • 55

    Rain

    • 41
    • 60

    Partly Sunny

    • 43
    • 66

    Partly Sunny

    • 43
    • 67

    Partly Sunny

    • 45
    • 67

    Partly Sunny

Today 21 Apr Foothills and Valleys of Snohomish and Northern King Counties

Mostly cloudy with a slight chance of rain until late Afternoon, then mostly cloudy with Showers likely and a slight chance of Thunderstorms late in the afternoon. Rainfall Amounts less than a tenth of an inch Likely, except higher Amounts possible in Thunderstorms. Highs near 60. Light wind.

Tonight 21 Apr Foothills and Valleys of Snohomish and Northern King Counties

Rain likely in the Evening, then a chance of rain after midnight. Rain in the morning. Rainfall Amounts a quarter to a half inch possible. Lows near 50. Light wind.

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Lake Chaplain Temperature Statistics

April Temperature

Arlington Municipal Airport (19.9 miles)

  • Lowest 8 April, 2026

    30 °F
  • Average April

    48.6 °F
  • Highest 18 April, 2026

    70 °F

Climate (2021–Present)

Arlington Municipal Airport (19.9 miles)

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  • Average Low 2021–2026

    42.6 °F
  • Average 2021–2026

    50.8 °F
  • Average High 2021–2026

    59.9 °F
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