Isaac Lake Weather Forecast

    • 46
    • 67

    Mostly Cloudy

    • 36
    • 60

    Mostly Cloudy

    • 36
    • 60

    Mostly Sunny

    • 38
    • 63

    Mostly Sunny

    • 41
    • 65

    Partly Sunny

    • 45
    • 66

    Partly Sunny

Today 19 Sep Central St. Louis

Patchy fog in the morning. Mostly cloudy. Highs in the mid 60s. East Winds around 5 Mph.

Tonight 19 Sep Central St. Louis

Mostly cloudy. Lows in the upper 40s. North Winds around 5 Mph.

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Isaac Lake Temperature Statistics

September Temperature

Ely, Ely Municipal Airport (11.2 miles)

  • Lowest 14 September, 2026

    32.5 °F

  • Average September

    60.6 °F

  • Highest 6 September, 2026

    82 °F

Climate (2021–2026)

Ely, Ely Municipal Airport (11.2 miles)

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  • Average Low 2021–2026

    29.1 °F

  • Average 2021–2026

    40.1 °F

  • Average High 2021–2026

    49.7 °F
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