Weather on April 20 at Isle Royale

Isle Royale National Park

MIMidwest800 ft elevation
Avg High48°F
Avg Low31°F
Warmest198054°F
Coldest201318°F

Based on 50 years of data from Houghton, MI

Planning Your Visit

April 20th in Isle Royale National Park (via Houghton, MI) typically brings chilly spring weather, with average highs around 48°F and lows near 31°F. Over 50 years of records, the warmest April 20th was in 1980 (54°F average), while the coldest was 2013 (18°F) — a 36°F range across recorded history. Precipitation has occurred on 34% of recorded April 20th dates, with snow falling 2% of the time. The last decade has been 2.1°F cooler on this date compared to 20-30 years ago.

The last decade has been 2.1°F cooler on this date compared to 20-30 years ago.

Planning for April 20th in Isle Royale? Bring layers as temperatures can vary throughout the day. Consider bringing rain gear or an umbrella.

Year by Year History

YearHighLowPrecipSnow
202546°F28°F0"--
202451°F33°F0.08"0"
202336°F32°F0.79"--
202240°F20°F1.27"--
202129°F21°F0.03"--
202047°F29°F0"--
201964°F35°F0"--
201854°F29°F0"--
201738°F34°F1.04"--
201661°F31°F0"--
201541°F33°F0.79"--
201453°F32°F0"--
201325°F10°F0"--
201247°F29°F0"--
201138°F28°F0"--
201061°F33°F0"--
200933°F32°F1.4"--
200853°F36°F0"--
200765°F32°F0"--
200660°F45°F0.38"--
200547°F28°F0"--
200445°F30°F0"--
200349°F34°F0.74"--
200236°F25°F0"--
200158°F38°F0.48"0"
200042°F37°F0"0"
199954°F27°F0"0"
199862°F29°F0"0"
199748°F32°F0"0"
199654°F32°F0.41"0"
199550°F24°F0"0"
199447°F29°F0"0"
199342°F30°F0"0"
199263°F36°F0.69"0"
199141°F29°F0"0"
199065°F39°F0"0"
198949°F30°F0"0"
198839°F29°F0.1"0.3"
198230°F20°F0"0"
198136°F19°F0"0"
198065°F43°F0"0"
197950°F39°F0.58"0"
197835°F25°F0"0"
197757°F41°F0.03"0"
197646°F29°F0"0"
197537°F29°F0"0"
197466°F35°F0.25"0"
197359°F45°F0.03"0"
197249°F26°F0"0"
197152°F37°F0"0"

April 20 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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