Porcupine Mountains State Park Weather Forecast

    • 40
    • 59

    Rain Showers

    • 36
    • 49

    Rain Showers Likely

    • 39
    • 52

    Mostly Sunny

    • 45
    • 63

    Mostly Cloudy

    • 47
    • 65

    Mostly Cloudy

    • 49
    • 67

    Slight Chance Rain Showers

Today 18 May Ontonagon

Patchy fog in the morning. Cloudy with a slight chance of Showers. A slight chance of Thunderstorms in the afternoon. Warmer with Highs in the upper 60s. Temperature falling into the middle 50s in the afternoon. West Winds 5 to 10 Mph, becoming north in the afternoon. Chance of rain 20 percent.

Tonight 18 May Ontonagon

A chance of Thunderstorms. Rain Showers. Patchy fog after midnight. Lows around 41. Northeast Winds 5 to 10 Mph. Chance of rain 100 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Porcupine Mountains State Park Temperature Statistics

May Temperature

Ironwood, Gogebic-Iron County Airport (26.1 miles)

  • Lowest 2 May, 2026

    23 °F
  • Average May

    45.2 °F
  • Highest 15 May, 2026

    82 °F

Climate (2021–Present)

Ironwood, Gogebic-Iron County Airport (26.1 miles)

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  • Average Low 2021–2026

    32.8 °F
  • Average 2021–2026

    42.6 °F
  • Average High 2021–2026

    51.4 °F
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