Lake Merwin Weather Forecast

    • 34
    • 44

    Mostly Sunny

    • 34
    • 45

    Mostly Sunny

    • 32
    • 44

    Partly Sunny

    • 31
    • 46

    Mostly Sunny

    • 32
    • 45

    Mostly Sunny

    • 34
    • 44

    Partly Sunny

Today 1 Dec South Washington Cascade Foothills

Mostly sunny. Widespread frost in the morning. Patchy fog in the morning. Highs 40 to 45. Northeast wind 5 to 10 Mph. Gusts to 25 Mph in the afternoon.

Tonight 1 Dec South Washington Cascade Foothills

Clear. Lows around 35. East wind 10 to 20 Mph. Gusts to 30 Mph increasing to 40 Mph after midnight.

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  • Temperature Forecast NOAA

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Lake Merwin Temperature Statistics

December Temperature

Southwest Washington Regional Airport (22.4 miles)

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  • Average December

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Climate (2010–Present)

Southwest Washington Regional Airport (22.4 miles)

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  • Average Low 2010–Present

    45.1 °F
  • Average 2010–Present

    52.7 °F
  • Average High 2010–Present

    62.3 °F
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