Square Lake Weather Forecast

    • 63
    • 78

    Rain Showers Likely

    • 59
    • 71

    Rain Showers

    • 60
    • 71

    Rain Showers Likely

    • 60
    • 77

    Chance Thunderstorms

    • 55
    • 77

    Slight Chance Thunderstorms

    • 52
    • 72

    Slight Chance Rain Showers

Today 18 Sep Washington

Mostly cloudy. Slight chance of Thunderstorms early in the morning. Chance of Thunderstorms in the afternoon. Highs in the upper 70s. Southeast Winds up to 10 Mph. Chance of precipitation 40 percent.

Tonight 18 Sep Washington

Mostly cloudy. Chance of Thunderstorms in the Evening, then Showers likely and chance of Thunderstorms after midnight. Lows in the lower 60s. East Winds 5 to 10 Mph. Chance of precipitation 60 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Square Lake Temperature Statistics

September Temperature

Lake Elmo Airport (10.6 miles)

  • Lowest 7 September, 2025

    37.4 °F

  • Average September

    61.1 °F

  • Highest 14 September, 2025

    82.4 °F

Climate (2020–Present)

Lake Elmo Airport (10.6 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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