Best Time to Visit Isle Royale National Park

    Month-by-month guide to visiting Isle Royale National Park. Compare temperatures, rainfall, and safari conditions across all 12 months. View the full Isle Royale National Park page for wildlife, lodges, and more.

    Best months:
    March
    April
    May
    June
    July
    August
    September
    Jan
    Good-6.24°C36.5mm
    Feb
    Good-7.25°C43.3mm
    Mar
    Great-2.18°C55.3mm
    Apr
    Great1.66°C91.9mm
    May
    Great7.37°C70.9mm
    Jun
    Great12.26°C73.6mm
    Jul
    Great16.25°C54.4mm
    Aug
    Great17.93°C66mm
    Sep
    Great15.41°C61.3mm
    Oct
    Good9.11°C79.3mm
    Nov
    Good2.8°C62.4mm
    Dec
    Good-2.64°C67.2mm
    Great (4-5)
    Good (3)
    Poor (1-2)
    Best month

    Conditions are based on historical weather data from Open-Meteo and wildlife sighting records from GBIF and iNaturalist. Actual conditions may vary by year.