Weather on March 31 at Isle Royale

Isle Royale National Park

MIMidwest800 ft elevation
Avg High39°F
Avg Low25°F
Warmest201060°F
Coldest197516°F

Based on 51 years of data from Houghton, MI

Planning Your Visit

March 31st in Isle Royale National Park (via Houghton, MI) typically brings cold spring weather, with average highs around 39°F and lows near 25°F. Over 51 years of records, the warmest March 31st was in 2010 (60°F average), while the coldest was 1975 (16°F) — a 44°F range across recorded history. Precipitation has occurred on 37% of recorded March 31st dates, with snow falling 14% of the time (heaviest snowfall: 3.1"). The last decade has been 4.9°F cooler on this date compared to 20-30 years ago.

The last decade has been 4.9°F cooler on this date compared to 20-30 years ago.

Planning for March 31st in Isle Royale? Bundle up with warm layers and protect extremities from the cold. Consider bringing rain gear or an umbrella.

Year by Year History

YearHighLowPrecipSnow
202636°F27°F0.05"--
202531°F14°F0"--
202438°F26°F0"--
202336°F30°F0.03"--
202232°F28°F0.05"--
202129°F19°F0"--
202038°F27°F0"--
201931°F9°F0"--
201825°F10°F0.1"--
201748°F29°F0"--
201636°F30°F0"--
201534°F24°F0.13"--
201438°F32°F0"--
201337°F20°F0.05"--
201244°F33°F0"--
201143°F16°F0"--
201073°F47°F0"--
200933°F26°F0"--
200835°F26°F0.05"--
200736°F31°F0.25"--
200653°F32°F0.91"--
200540°F32°F1.42"--
200434°F20°F0"--
200336°F-2°F0"--
200235°F26°F0"0"
200145°F27°F0"0"
200063°F23°F0"0"
199964°F37°F0"0"
199843°F33°F0"0"
199741°F10°F0"0"
199635°F26°F0"0"
199540°F18°F0"0"
199445°F34°F0"0"
199335°F22°F0.1"0.5"
199235°F22°F0"0"
199138°F30°F0.13"0.6"
199058°F34°F0"0"
198930°F23°F0.03"0.2"
198835°F23°F0"0"
198240°F29°F0"0"
198140°F32°F0.3"0"
198045°F27°F0"0"
197932°F19°F0"0"
197839°F30°F0.03"0"
197733°F24°F0"0"
197633°F30°F0.69"1.1"
197522°F10°F0.1"0.5"
197433°F24°F0.05"0.1"
197343°F29°F0"0"
197231°F26°F0.58"3.1"
197140°F29°F0"0"

March 31 at Nearby Parks

Holiday Weather at Isle Royale

Official NPS WebsiteVisit nps.gov/isro for park information, alerts, and reservations

Explore More at Isle Royale

See historical weather for other dates

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March 31 Weather at Isle Royale National Park - Historical Data