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.
Porcupine Mountains State Park Temperature Statistics
May Temperature
Ironwood, Gogebic-Iron County Airport (26.1 miles)
Lowest 2 May, 2026
23 °FAverage May
45.2 °FHighest 15 May, 2026
82 °F
Climate (2021–Present)
Ironwood, Gogebic-Iron County Airport (26.1 miles)
Average Low 2021–2026
32.8 °FAverage 2021–2026
42.6 °FAverage High 2021–2026
51.4 °F