Lake Merwin Weather Forecast

    • 37
    • 53

    Chance Rain Showers

    • 37
    • 58

    Mostly Sunny

    • 39
    • 56

    Mostly Sunny

    • 43
    • 58

    Partly Sunny

    • 42
    • 62

    Mostly Cloudy

    • 35
    • 47

    Rain Showers Likely

Today 29 Mar South Washington Cascade Foothills

Mostly cloudy with a slight chance of rain Showers this Morning, then mostly sunny this afternoon. Highs in the upper 50s. East wind 5 to 10 Mph, becoming northeast this afternoon. Chance of rain 20 percent.

Tonight 29 Mar South Washington Cascade Foothills

Mostly clear. Areas of frost after midnight. Lows in the mid 30s. Northeast wind 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Merwin Temperature Statistics

March Temperature

Southwest Washington Regional Airport (22.4 miles)

  • Lowest 6 March, 2024

    26.1 °F
  • Average March

    46.1 °F
  • Highest 16 March, 2024

    75.9 °F

Climate (2019–Present)

Southwest Washington Regional Airport (22.4 miles)

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  • Average Low 2019–2024

    45.1 °F
  • Average 2019–2024

    52.6 °F
  • Average High 2019–2024

    62 °F
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