Northern Lights in Wisconsin Tonight

Can you see the northern lights in Wisconsin? Yes, most often in the far north. By NOAA’s rule the aurora’s edge reaches Superior, on Lake Superior, at Kp 6−, Wausau at 6+, Green Bay at 7− and Milwaukee at 7+. Kp 6 or more comes on about 554 days in an 11-year solar cycle; Kp 7 or more on about 194.

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 Superior, WI: type your own town, or use your location, for tonight’s answer where you are.

What Kp does Wisconsin 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
Superior, WI	55.2°	6−	–	Kp ≥ 6: 554	north
Wausau, WI	53.6°	6+	–	Kp ≥ 7: 194	north
Green Bay, WI	53.3°	7−	–	Kp ≥ 7: 194	north
Milwaukee, WI	51.8°	7+	Kp 7 (G3)	Kp ≥ 7: 194	north
Madison, WI	51.8°	7+	Kp 7 (G3)	Kp ≥ 7: 194	north

The farther toward the magnetic pole, the lower the Kp: Superior needs the least of these towns and Madison 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 Wisconsin?

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	Superior	Wausau
January	12.5 h	12.5 h
February	11.3 h	11.3 h
March	9.8 h	10 h
April	8.2 h	8.2 h
May	6.3 h	6.5 h
June	5.2 h	5.5 h
July	5.7 h	6 h
August	7.3 h	7.7 h
September	9.3 h	9.3 h
October	11 h	11 h
November	12.3 h	12.3 h
December	13 h	12.8 h

Plan it

FAQ

Can you see the northern lights in Wisconsin?

Yes, when the Kp is high enough and the night is dark and clear. By NOAA’s rule, Superior needs Kp 6−, Wausau needs Kp 6+, Green Bay needs Kp 7−, Milwaukee needs Kp 7+, Madison 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 Wisconsin?

Only NOAA’s forecast for tonight can say: the tool at the top of this page reads it for Superior (or your own town) and compares it with what Superior 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 Wisconsin?

Superior 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 Wisconsin?

Superior, at magnetic latitude 55.2°: Kp 6− overhead; Wausau, at magnetic latitude 53.6°: Kp 6+ overhead; Green Bay, at magnetic latitude 53.3°: Kp 7− overhead; Milwaukee, at magnetic latitude 51.8°: Kp 7+ overhead, Kp 7 low on the horizon; Madison, at magnetic latitude 51.8°: Kp 7+ overhead, Kp 7 low on the horizon. 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 Milwaukee?

Sometimes. By NOAA’s rule Milwaukee needs Kp 7+, or Kp 7 to see the aurora low on the horizon. 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.