Onion Lake Weather Forecast

    • 31
    • 48

    Increasing Clouds

    • 32
    • 43

    Rain Showers

    • 34
    • 55

    Partly Sunny

    • 41
    • 56

    Mostly Cloudy

    • 43
    • 63

    Slight Chance Rain Showers

    • 37
    • 59

    Chance Rain Showers

Today 11 May Northern Cook/Northern Lake

Sunny. Not as cool with Highs in the lower 50s. Southwest Winds 5 to 10 Mph.

Tonight 11 May Northern Cook/Northern Lake

Mostly cloudy. Rain Showers likely after midnight. Lows in the mid 30s. Southeast Winds 5 to 10 Mph with Gusts up to 25 Mph. Chance of rain 70 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Onion Lake Temperature Statistics

May Temperature

Grand Marais/Cook County Airport (12.4 miles)

  • Lowest 2 May, 2026

    21.2 °F

  • Average May

    38.7 °F

  • Highest 3 May, 2026

    57.2 °F

Climate (2021–Present)

Grand Marais/Cook County Airport (12.4 miles)

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  • Average Low 2021–2026

    28.7 °F

  • Average 2021–2026

    38.1 °F

  • Average High 2021–2026

    46.6 °F
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