Is Gothenburg or Aalborg better for the northern lights?

Gothenburg sits closer to the oval, at 57.4 degrees geomagnetic against 57.1. Darkness, cloud and your dates decide the rest; the tables on this page show both towns month by month.

Which has longer nights in December, Gothenburg or Aalborg?

Gothenburg, with 15.6 hours of civil night on December 15 against 15.5 in Aalborg.

What Kp do Gothenburg and Aalborg need?

By SWPC's rule of 66 degrees at Kp 0 and 2 degrees per step, Gothenburg needs about Kp 5 and Aalborg Kp 5 for the average oval edge to sit overhead.

When is it too light for aurora in Gothenburg and Aalborg?

Gothenburg: never, every night has civil darkness. Aalborg: never, every night has civil darkness.

Which is clearer, Gothenburg or Aalborg?

Gothenburg, with 74% mean cloud in the months with 4 hours or more of civil night against 75% in Aalborg (NASA POWER, 2001 to 2020).

Comparison

Gothenburg vs Aalborg for the northern lights

Answer

Gothenburg sits 0.3 degrees higher on the IGRF-14 dipole, 57.4 against 57.1. By SWPC's oval-edge rule Gothenburg needs about Kp 5 for the average edge to sit overhead and Aalborg Kp 5. On the map Gothenburg is also closer to the pole, by 0.7 degrees.

57.4° / 57.1°

dipole latitude

Side by side

Computed figures for both towns
Figure	Gothenburg	Aalborg
Dipole latitude	57.4°	57.1°
Kp for the oval edge overhead	Kp 5	Kp 5
Civil night, December 15	15.6 h	15.5 h
Dark-season days	323	333
Nights with no civil darkness	0	0
Dark-month cloud, NASA POWER	74%	75%
Solar midnight, December 15	00:07	00:15

Gothenburg sits at 57.4 degrees geomagnetic. By SWPC's rule the average oval edge is overhead at Kp 5, and aurora is usually visible on the northern horizon at G1 (Kp 5) or less. Aalborg sits at 57.1 degrees geomagnetic. By SWPC's rule the average oval edge is overhead at Kp 5, and aurora is usually visible on the northern horizon at G1 (Kp 5) or less.

Civil night month by month

On December 15 Gothenburg has 15.6 hours of civil night and Aalborg 15.5. Across the 15th of each month, Gothenburg is darker in 2 months and Aalborg in 4. The widest gap comes in June, when Aalborg has 0.4 more hours.

Hours of civil night on the 15th of each month, 2026
Month	Gothenburg	Aalborg	Difference
January	15.0 h	14.9 h	+0.1 h
February	13.0 h	13.0 h	+0.0 h
March	10.8 h	10.8 h	+0.0 h
April	8.1 h	8.1 h	+0.0 h
May	5.3 h	5.5 h	-0.2 h
June	3.2 h	3.6 h	-0.4 h
July	4.3 h	4.6 h	-0.3 h
August	7.0 h	7.2 h	-0.2 h
September	9.8 h	9.8 h	+0.0 h
October	12.2 h	12.2 h	+0.0 h
November	14.4 h	14.4 h	+0.0 h
December	15.6 h	15.5 h	+0.1 h

Difference: Gothenburg minus Aalborg. Each figure links to that town's month page.

Season and midnight sun

Gothenburg has some civil darkness every night of 2026, and its dark season, 4 or more evening hours of civil night, lasts 323 days. Aalborg has some civil darkness every night of 2026, and its dark season, 4 or more evening hours of civil night, lasts 333 days.

Distance, cloud and time zones

The two towns are 143 km apart by great circle. In the dark months both average about 74% cloud in NASA POWER's 2001 to 2020 record. Gothenburg's best month by civil night times clear sky is October. Aalborg's best month by civil night times clear sky is September. Time zones: Europe/Stockholm and Europe/Copenhagen.

For tonight, open the live pages for Gothenburg and Aalborg, which carry the live OVATION cell.

Questions

Is Gothenburg or Aalborg better for the northern lights?: Gothenburg sits closer to the oval, at 57.4 degrees geomagnetic against 57.1. Darkness, cloud and your dates decide the rest; the tables on this page show both towns month by month.
Which has longer nights in December, Gothenburg or Aalborg?: Gothenburg, with 15.6 hours of civil night on December 15 against 15.5 in Aalborg.
What Kp do Gothenburg and Aalborg need?: By SWPC's rule of 66 degrees at Kp 0 and 2 degrees per step, Gothenburg needs about Kp 5 and Aalborg Kp 5 for the average oval edge to sit overhead.
When is it too light for aurora in Gothenburg and Aalborg?: Gothenburg: never, every night has civil darkness. Aalborg: never, every night has civil darkness.
Which is clearer, Gothenburg or Aalborg?: Gothenburg, with 74% mean cloud in the months with 4 hours or more of civil night against 75% in Aalborg (NASA POWER, 2001 to 2020).

Sources and verification

IGRF-14 coefficients, NOAA NCEIhttps://www.ngdc.noaa.gov/IAGA/vmod/coeffs/igrf14coeffs.txt
SunCalchttps://github.com/mourner/suncalc
GeoNameshttps://www.geonames.org/export/
NASA POWER climatologyhttps://power.larc.nasa.gov/docs/services/api/temporal/climatology/
NOAA SWPC, Tips on viewing the aurorahttps://www.spaceweather.gov/content/tips-viewing-aurora

Quoted figures last checked against their sources on 2026-09-30; next review 2026-12-31. Computed figures come from SunCalc and the IGRF-14 dipole as described in the methodology. Every quote is listed in the sources ledger.