Isle Royale National Park Rainfall Forecast

Today 21 May
No Rain
Fri 22 May
No Rain
Sat 23 May
65%
Sun 24 May
40%
Mon 25 May
15%
Tue 26 May
5%
Wed 27 May
5%

Isle Royale National Park Rainfall Statistics

May Rainfall

Copper Harbor (60.3 miles)

Total Rainfall 2026
11.2in
Daily Average 2026
0.1in
Wettest Day 18 February, 2026
1.1in
Wet Days 2026
69/141 (49%)
Total Rainfall April
2.6in
Daily Average April
0.1in
Wettest Day 2 April, 2026
0.6in
Wet Days April
14/30 (47%)
Total Rainfall May
0.7in
Daily Average May
0.04in
Wettest Day 18 May, 2026
0.2in
Wet Days May
5/21 (24%)

Climate (2010–Present)

Copper Harbor (60.3 miles)

Take a look at our website widgetsAvailable free! Find Out More

Annual Average 2021–2025
27.2in
Monthly Average 2021–2026
2.3in
Daily Average 2021–2026
0.1in
Wettest Day 23 July, 2021
2.7in

Get WillyWeather+ to remove ads