Northern lights in Duluth tonight
Minnesota, USA · 55° magnetic latitude · Kp 4 threshold
Kp 1 is well below the Kp 4 threshold needed for aurora to be visible from Duluth.
7-day outlook for Duluth
Based on CME arrival predictions from NASA DONKI. Arrival times ±6 hours.
auroratonight.space
What Kp is needed here?
Duluth sits at a magnetic latitude of approximately 55°N. The Kp index - a global measure of geomagnetic activity on a scale from 0 (quiet) to 9 (extreme storm), updated every 3 hours - needs to reach Kp 4 before the auroral oval expands far enough south to be visible from here.
At Kp 4, visibility is possible from Duluth but skies need to be clear and dark. Cloud cover and light pollution remain the main obstacles even when Kp is high enough.
Best dark sky sites near Duluth
Light pollution is the biggest obstacle after cloud cover. These sites give you the best dark northern horizon within reach.
Canal Park and the Lakefront
Get directions ↗North-facing directly over Lake Superior, with open water extending for miles and no light pollution across the lake surface. Walk east from the canal along the paved trail to leave the parking lot lighting behind. The wide unobstructed horizon makes this one of the most accessible aurora-watching spots in Duluth, five minutes from the downtown grid.
Hawk Ridge Nature Reserve
Get directions ↗Elevated position at roughly 425 meters above the city, primarily known for fall raptor counts but also one of Duluth's best aurora viewpoints. The dark northern horizon opens over Lake Superior below. The ridge sits above the worst of the city light dome, and the drive up takes under 15 minutes from Canal Park.
Jay Cooke State Park
Get directions ↗About 20 minutes south of Duluth off I-35, along the St. Louis River gorge. The old-growth forest corridor blocks road light, and the riverbanks face open sky above the canyon. No significant light sources in any direction from the interior trails. Best accessed from the swinging bridge trailhead off MN-210.
Best time to see the northern lights in Duluth
Duluth's aurora season runs from late September through to March, when nights are long enough for truly dark skies. The equinox months, September and March, bring a natural boost in geomagnetic activity, making them statistically the best of the season. Summer months bring too much twilight for aurora to be visible at this latitude.
Activity peaks around the September and March equinoxes, when Earth's magnetic field geometry is most favourable for coupling with the solar wind. Events during these two windows tend to produce the strongest displays of the year for observers at Duluth's latitude.
April through August brings persistent astronomical twilight that washes out aurora completely. Even strong events (Kp 6+) remain invisible during this period because the sky never gets dark enough.
How often does the aurora appear in Duluth?
Average nights per month the Kp reached Duluth's threshold of 4+, from 15 years of geomagnetic data (2010–2024).
Counts the Kp 4+ threshold only - cloud cover and local darkness are not included.
Kp data: GFZ German Research Centre for Geosciences, CC BY 4.0
Plan your trip to Duluth
Best window
The August to October window averages 15 aurora nights - the strongest consecutive stretch of the year.
How long to stay
For your best chance in March, plan at least 9 nights.
Related pages
Northern Lights USA
USA-wide aurora forecast hub.
Read →Northern Lights Marquette Tonight
Marquette - Lake Superior dark sky on Michigan's Upper Peninsula.
Read →Northern Lights Minnesota
Minnesota statewide aurora forecast and dark sky locations.
Read →Northern Lights Michigan UP
Michigan Upper Peninsula aurora guide, from Marquette to the Keweenaw.
Read →What Is the Kp Index?
What Kp 4 means for aurora viewing at 55° magnetic latitude.
Read →Aurora photographs from Duluth
Real photos sourced from Wikimedia Commons.
Aurora over Duluth 
Aurora over Duluth 
Aurora over Duluth 
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