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Northern lights Whitefish tonight

Whitefish sits at 55° magnetic latitude in northwest Montana, 10 miles from Glacier National Park. Kp 4 is the threshold here. Whitefish Lake State Park is accessible from town in under 5 minutes, and Glacier's Lake McDonald offers a Dark Sky-designated mountain lake backdrop. Best season: August through October, February through April.

Aurora visibility - Whitefish

Unlikely tonight

Kp 1 is well below the Kp 4 threshold needed for aurora to be visible from Whitefish.

Current Kp

of 9

Threshold for Whitefish: Kp 4 Magnetic latitude: ~55°N Updated: 15 May, 17:57 UTC

↓ Bz — nT Solar wind — km/s Density — p/cm³ ☁ —%

Conditions right now: — Kp + Bz + solar wind + cloud + moon

7-day outlook for Whitefish

Today

15 May

Quiet

Tomorrow

16 May

Quiet

Sun

17 May

Quiet

Mon

18 May

Quiet

Tue

19 May

Quiet

Wed

20 May

Quiet

Thu

21 May

Quiet

Based on CME arrival predictions from NASA DONKI. Arrival times ±6 hours.

What Kp is needed here?

Whitefish 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 Whitefish 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 Whitefish

Light pollution is the biggest obstacle after cloud cover. These sites give you the best dark northern horizon within reach.

Glacier National Park - Lake McDonald

10 miles east of Whitefish via US-2, the largest lake in Glacier NP faces north into the park's dramatic peaks. The lake surface is accessible year-round via Going-to-the-Sun Road to the lodge area (the upper alpine section closes in winter, but the lake itself remains open). Zero light pollution inside the park. The reflection of the northern sky off still water on calm nights adds a second plane of color.

Whitefish Lake State Park

1.5 miles north of downtown on the south shore of Whitefish Lake. The north-facing shoreline looks across open water toward the Swan Range. Past the boat launch, lighting drops to near zero and conditions approach Bortle 3. This is the most immediately accessible dark sky from Whitefish's town center - under 5 minutes by car. The lake level holds dark reflections well into fall.

Going-to-the-Sun Road pullouts (summer and fall only)

Alpine positions at 1,500 to 2,000 meters along the road through Glacier NP. The road typically opens fully in late June and closes in mid-October, with exact dates varying by snow conditions. Above the tree line, the sky is unobstructed in all directions and the mountain terrain produces some of the most striking aurora foregrounds in the continental US. Logan Pass at 2,026 meters is the highest point on the road and has no ambient light from any settlement.

Best time to see the northern lights in Whitefish

Whitefish'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.

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

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 Whitefish'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.

Other USA aurora forecasts

← USA overview

Bozeman

Unlikely

Gallatin Valley, Yellowstone gateway, Montana

~54°N mag. lat. Kp 4

Great Falls

Unlikely

North-central Montana, Missouri River plains

~56°N mag. lat. Kp 3-4

Montana

Unlikely

Glacier NP, Rocky Mountain aurora

~55°N mag. lat. Kp 4-5

Northern Lights USA

USA-wide aurora forecast hub.

Northern Lights Bozeman Tonight

Bozeman - southwest Montana at 54° magnetic latitude with Hyalite Canyon dark sky.

Northern Lights Great Falls Tonight

Great Falls - north-central Montana plains at 56° magnetic latitude.

Northern Lights Montana

Montana statewide aurora forecast and dark sky guide.

What Is the Kp Index?

What Kp 4 means for aurora viewing at 55° magnetic latitude.

Common questions

Aurora watching from Whitefish and Glacier National Park.

Can I watch aurora from Glacier National Park?

Yes. Glacier is one of the best aurora positions in the continental US when active. The park holds International Dark Sky Park status, and positions like Lake McDonald and the Going-to-the-Sun Road pullouts have zero ambient light from nearby settlements. The main limitations are access - the upper road closes in mid-October - and weather. Northwest Montana experiences cloud cover from Pacific systems, particularly in fall and early winter. Clear nights in the park during active geomagnetic periods are worth planning around.

What Kp is needed for aurora in Whitefish?

Whitefish sits at about 55° magnetic latitude, so the threshold is Kp 4. The Kp index is a global measure of geomagnetic activity on a scale from 0 (quiet) to 9 (extreme storm), updated every 3 hours. At Kp 4, aurora is typically visible on the northern horizon from Whitefish Lake State Park or Lake McDonald. Kp 5 or higher brings the display overhead. The park's complete absence of light pollution means marginal Kp 4 events are detectable here that would be lost in most city environments.

Is Whitefish or Bozeman a better base for Montana aurora?

Whitefish sits 1° further north in magnetic latitude and has Glacier National Park immediately adjacent - giving access to high-elevation, zero-light-pollution terrain with essentially no driving. Whitefish Lake State Park is also usable without leaving town. Bozeman's advantage is weather: it sits east of the main Pacific moisture track and typically gets more clear nights per year than the Whitefish area. For aurora frequency on clear nights, Whitefish wins; for clear night frequency, Bozeman has an edge.

Is Glacier National Park accessible for aurora in winter?

Partially. The park's lower elevations, including the Lake McDonald area and the Apgar village zone, stay open year-round. The Going-to-the-Sun Road closes at the Avalanche Creek area in winter, which blocks access to the alpine positions. Winter in the park is genuinely cold - temperatures at Apgar average -10 to -15°C in January - and the road can be icy. Whitefish Lake State Park is a more practical winter alternative when conditions make the park road risky.

What are the best months for aurora and clear skies near Whitefish?

March through April and August through September offer the best combination. August and September bring the first long dark nights after summer, and the Going-to-the-Sun Road is still fully open. March and April combine good geomagnetic odds (the Russell-McPherron effect raises storm probability near equinoxes) with improving weather patterns after the wet winter months. January and February can produce stunning aurora on clear nights but have lower sky clarity rates. July nights are too short for useful darkness at 48°N geographic latitude.