Sunfish Lake Park Weather Forecast

    • 65
    • 82

    Rain Showers Likely

    • 61
    • 71

    Rain Showers

    • 59
    • 72

    Rain Showers Likely

    • 59
    • 74

    Chance Rain Showers

    • 59
    • 76

    Slight Chance Thunderstorms

    • 56
    • 74

    Partly Sunny

    • 55
    • 73

    Partly Sunny

Today 18 Sep Washington

Partly sunny. A 20 percent chance of Thunderstorms late in the afternoon. Highs in the upper 70s. Southeast Winds 5 to 10 Mph.

Tonight 18 Sep Washington

Mostly cloudy. Chance of Thunderstorms until early Morning, then chance of Showers and slight chance of Thunderstorms late in the night. Patchy fog late in the night. Lows in the mid 60s. East Winds up to 10 Mph. Chance of precipitation 50 percent.

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Sunfish Lake Park Temperature Statistics

September Temperature

Lake Elmo Airport (2.5 miles)

  • Lowest 7 September, 2025

    37.4 °F

  • Average September

    62 °F

  • Highest 16 September, 2025

    89.6 °F

Climate (2020–Present)

Lake Elmo Airport (2.5 miles)

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  • Average Low 2020–2025

    36.5 °F

  • Average 2020–2025

    46 °F

  • Average High 2020–2025

    54.9 °F
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