Sullivan Lake Weather Forecast

    • 38
    • 64

    Mostly Sunny

    • 50
    • 65

    Chance Rain Showers

    • 48
    • 76

    Mostly Sunny

    • 39
    • 67

    Partly Sunny

    • 43
    • 59

    Rain Showers Likely

    • 43
    • 64

    Rain Showers Likely

Today 13 May Central St. Louis

Sunny. Not as cool with Highs in the mid 60s. North Winds 5 to 10 Mph with Gusts up to 20 Mph.

Tonight 13 May Central St. Louis

Mostly clear. Lows in the upper 30s. Northeast Winds around 5 Mph, becoming southeast after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Sullivan Lake Temperature Statistics

May Temperature

Two Harbors (19.3 miles)

  • Lowest 8 May, 2026

    21.2 °F

  • Average May

    40.6 °F

  • Highest 3 May, 2026

    60.8 °F

Climate (2021–Present)

Two Harbors (19.3 miles)

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  • Average Low 2021–2026

    31.8 °F

  • Average 2021–2026

    41.5 °F

  • Average High 2021–2026

    50.6 °F
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