Northern Lights in Montana Tonight

Can you see the northern lights in Montana? Yes, most often in the north of the state. By NOAA’s rule the aurora’s edge reaches Kalispell, by Glacier National Park, and Great Falls at Kp 6, Missoula at 6+ and Billings at 7−. Kp 6 or more comes on about 554 days in an 11-year solar cycle.

Type where you are: the Kp your spot needs, NOAA’s forecast for your dark hours tonight and the next two nights, the moon, and which way to look.

Fairbanks, AK · magnetic latitude 65.7°

You need Kp 0+By NOAA’s rule the aurora’s edge reaches Fairbanks at Kp 0+. Loading NOAA’s forecast for tonight…

Kp you need: 0+ overhead
Look toward: north-northeast

Kp forecast: NOAA Space Weather Prediction Center. Places: GeoNames.

The forecast above opens on Kalispell, MT: type your own town, or use your location, for tonight’s answer where you are.

What Kp does Montana need?

NOAA’s rule: “At Kp = 0, the equator ward edge of the auroral oval is approximately 66 degrees.” “And it moves equatorward about 2 degrees for each level of Kp.” That is in magnetic latitude — NOAA: “This relationship holds true in geomagnetic latitude, not geographic.” — so a town needs a Kp of (66 − its magnetic latitude) ÷ 2. In a big storm the aurora can also be seen from farther away, low on the horizon: NOAA’s storm scale says how low it “has been seen” at Kp 6 to 9.

Town	Magnetic latitude	Kp overhead	Low on the horizon	Days per 11-year cycle	Look toward
Kalispell, MT	54.6°	6	–	Kp ≥ 6: 554	north
Great Falls, MT	54.3°	6	–	Kp ≥ 6: 554	north
Missoula, MT	53.4°	6+	–	Kp ≥ 7: 194	north
Billings, MT	52.9°	7−	–	Kp ≥ 7: 194	north

The farther toward the magnetic pole, the lower the Kp: Kalispell needs the least of these towns and Billings the most. NOAA adds a warning worth keeping: “It should be noted that the relationship between Kp and auroral latitude are approximate and represent averages.”

When is it dark enough in Montana?

NOAA: “The aurora is not visible during daylight hours.” These are the hours with the Sun 12° or more below the horizon (the end of nautical twilight) on the night after the 15th of each month. “The best Seasons for aurora watching are around the spring and fall equinoxes.”

Month	Kalispell	Great Falls
January	12.8 h	12.8 h
February	11.3 h	11.3 h
March	9.8 h	9.8 h
April	7.8 h	7.8 h
May	6 h	6 h
June	4.5 h	4.8 h
July	5.3 h	5.3 h
August	7 h	7.3 h
September	9 h	9.2 h
October	11 h	11 h
November	12.3 h	12.3 h
December	13 h	13 h

Plan it

FAQ

Can you see the northern lights in Montana?

Yes, when the Kp is high enough and the night is dark and clear. By NOAA’s rule, Kalispell needs Kp 6, Great Falls needs Kp 6, Missoula needs Kp 6+, Billings needs Kp 7−. Kp 6 or more comes on about 554 days in an 11-year solar cycle (NOAA’s storm scale).

Can I see the northern lights tonight in Montana?

Only NOAA’s forecast for tonight can say: the tool at the top of this page reads it for Kalispell (or your own town) and compares it with what Kalispell needs: Kp 6. Look north, away from city lights; NOAA: “Best aurora is usually within an hour or two of midnight (between 10 PM and 2 AM local time).”

When is the best time to see the northern lights in Montana?

Kalispell has its longest nights in December (13 hours of darkness). NOAA adds: “The best Seasons for aurora watching are around the spring and fall equinoxes.”

What Kp do you need to see the northern lights in Montana?

Kalispell, at magnetic latitude 54.6°: Kp 6 overhead; Great Falls, at magnetic latitude 54.3°: Kp 6 overhead; Missoula, at magnetic latitude 53.4°: Kp 6+ overhead; Billings, at magnetic latitude 52.9°: Kp 7− overhead. The rule is NOAA’s: the oval’s edge is at about 66° magnetic latitude at Kp 0 and moves about 2° toward the equator for each level of Kp.

Can you see the northern lights in Billings?

Sometimes. By NOAA’s rule Billings needs Kp 7−. Kp 7 or more comes on about 194 days in an 11-year solar cycle (NOAA’s storm scale). Its own lights make it harder: NOAA says “Get away from city lights.”

How these numbers are made

Magnetic latitude is the dipole’s, with the pole from the IGRF-14 coefficients (NOAA NCEI / IAGA). The Kp overhead is NOAA’s rule, “low on the horizon” and the days per cycle are NOAA’s storm scale, and tonight’s Kp in the tool is NOAA’s 3-day forecast. Darkness is the Sun’s position, computed for 2026. Towns: GeoNames (CC BY 4.0). Rules checked 2026-09-27.