Niswi Lake Weather Forecast

    • 49
    • 61

    Rain Showers

    • 40
    • 62

    Decreasing Clouds

    • 46
    • 67

    Slight Chance Rain Showers

    • 45
    • 69

    Partly Sunny

    • 49
    • 68

    Chance Rain Showers

    • 46
    • 68

    Mostly Cloudy

    • 45
    • 65

    Chance Rain Showers

Today 14 Sep North St. Louis

Showers with a slight chance of Thunderstorms. Near steady temperature in the mid 50s. Temperature falling into the mid 50s late. South Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain near 100 percent.

Tonight 14 Sep North St. Louis

Showers with a slight chance of Thunderstorms this evening. Not as cool with Lows in the upper 40s. South Winds 10 to 15 Mph with Gusts up to 30 Mph. Chance of rain near 100 percent.

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Niswi Lake Temperature Statistics

September Temperature

Ely, Ely Municipal Airport (19.3 miles)

  • Lowest 10 September, 2026

    42.8 °F

  • Average September

    63.7 °F

  • Highest 6 September, 2026

    82 °F

Climate (2021–2026)

Ely, Ely Municipal Airport (19.3 miles)

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  • Average Low 2021–2026

    29.2 °F

  • Average 2021–2026

    40.2 °F

  • Average High 2021–2026

    49.7 °F
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