Grandma's Marathon 2026
Duluth, MNFriday, June 19
One of America's most scenic marathon courses along the shores of Lake Superior from Two Harbors to Duluth, MN.
Weather Model
Forecast Evolution
0d out
☁️
L 48°
H 68°
1d out
🌧️
L 50°
H 65°
2d out
🌧️
L 46°
H 60°
3d out
🌧️
L 45°
H 64°
4d out
🌧️
L 50°
H 64°
5d out
☁️
L 51°
H 66°
6d out
🌧️
L 49°
H 73°
7d out
🌧️
L 49°
H 77°
8d out
🌧️
L 50°
H 63°
9d out
🌫️
L 49°
H 78°
10d out
🌫️
L 51°
H 69°
11d out
☀️
L 54°
H 75°
12d out
🌫️
L 58°
H 77°
13d out
🌧️
L 54°
H 58°
14d out
🌫️
L 53°
H 81°
Model Race Results
Scored against the actual observed high of 66.4°F. Final scores reflect real accuracy.
🥇NWS0.53 · 7d
🥈ECMWF IFS1.41 · 14d
🥉ECMWF AIFS1.79 · 15d
4.GFS1.88 · 15d
5.ICON1.96 · 7d
6.GEM2.12 · 9d
7.Meteo-France7.87 · 4d
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