Can you see the northern lights in Södertälje in March?

On dark, clear nights with enough activity. 31 of 31 nights at Södertälje have civil darkness, and 12% of past March days reached Kp 5.

How dark is Södertälje in March?

Södertälje averages 10.6 hours of civil night a night in March 2027, from 11 h 58 min on the 1st to 9 h 17 min on the last night.

How cloudy is Södertälje in March?

NASA POWER's 2001 to 2020 climatology gives Södertälje's 1 degree cell 76% mean cloud in March, against 75% for the whole year. It is an all-hours average, not a forecast.

What is the best night in March 2027 for aurora in Södertälje?

By darkness and moon alone, Mar 1, with 4 h of moon-free darkness inside 10 PM to 2 AM at Södertälje. Activity on that date will only be known hours ahead.

Is March or April better in Södertälje?

By civil night times the clear share, March scores 2.6 hours at Södertälje and April 2.3. March comes out ahead.

Södertälje · March 2027

Northern lights in Södertälje in March 2027

Answer

March gives Södertälje 10.7 hours of civil night on the 15th, the 6th darkest of its 12 months, under 76% mean cloud. 12% of March days since 1996 reached Kp 5, enough for the oval edge to reach Södertälje.

10.6 h

civil night, average night

SunCalc for 59.20, 17.63; NASA POWER; GFZ Kp

March against the rest of the year

2.3

2.1

2.6

2.3

1.5

0.7

1.2

2.0

2.6

2.8

2.9

2.7

March cloud at Södertälje averages 76% in NASA POWER's 2001 to 2020 record, close to its yearly mean of 75%. July is Södertälje's clearest month at 68%. By civil night times clear sky, March scores 2.6 hours at Södertälje, 5th of 12. Stockholm, 29 km away, averages 78%, cloudier by 2 points.

Civil night at Södertälje starts March at 11 h 58 min and reaches 9 h 17 min by March 31, 2.7 hours shorter. SWPC's 10 PM to 2 AM window is fully dark on every night. True astronomical darkness, the sun 18 degrees down, lasts 7.4 hours on the 15th.

March night by night

March opens toward a new moon on Mar 8, with full moon on Mar 22, in Europe/Stockholm dates. Södertälje gets 190 hours of civil night with the moon below the horizon across the month. The best of them for moon-free darkness inside 10 PM to 2 AM: Mar 1 (4 h), Mar 2 (4 h), Mar 3 (4 h).

1
34% lit
11.5 h
2
25% lit
11.8 h
3
18% lit
11.8 h
4
11% lit
11.7 h
5
6% lit
11.6 h
6
2% lit
11.5 h
7
0% lit
11.4 h
8
0% lit
11.3 h
New
9
3% lit
10.2 h
10
7% lit
8.7 h
11
13% lit
7.1 h
12
22% lit
5.4 h
13
31% lit
3.7 h
14
42% lit
2.2 h
15
53% lit
1.1 h
16
65% lit
0.5 h
17
75% lit
0.2 h
18
84% lit
0.0 h
19
92% lit
0.0 h
20
97% lit
0.0 h
21
100% lit
0.0 h
22
100% lit
0.0 h
Full
23
97% lit
1.5 h
24
92% lit
3.0 h
25
86% lit
4.6 h
26
78% lit
6.1 h
27
70% lit
7.4 h
28
61% lit
8.3 h
29
51% lit
8.8 h
30
42% lit
9.0 h
31
33% lit
9.1 h

Each cell is the night that starts on that date. Hours are civil-dark time with the moon below the horizon; the green rule scales with them. Green outline: new moon. Bone outline: full moon.

Activity in past Marchs

Södertälje needs Kp 5 for the average oval edge to sit overhead. 111 of the 930 March days from 1996 to 2025 (12%) reached it in the GFZ Potsdam record, one of the three most active months for that level; storm days with Kp 5 or more made up 12%. Södertälje sits at 57.9 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.

March across Sweden

Södertälje ranks 6th in Sweden for civil night on March 15, behind Gothenburg at 10.8 hours. Coming from February (13.1 hours at Södertälje), March loses darkness, and April brings shorter nights (7.8 hours on the 15th). The March equinox falls on March 20, 21:25 Södertälje time, inside the weeks SWPC links with larger storms.

Civil night on March 15 and March cloud, month-page towns in Sweden
Town	Civil night	Cloud
Gothenburg	10.8 h	74%
Malmö	10.8 h	71%
Linköping	10.8 h	72%
Jönköping	10.8 h	72%
Helsingborg	10.8 h	75%
Södertälje	10.7 h	76%
Stockholm	10.7 h	78%
Uppsala	10.7 h	76%
Örebro	10.7 h	74%
Sollentuna	10.7 h	76%
Västerås	10.7 h	76%
Sundsvall	10.6 h	69%

Darkness and moon, every night

Södertälje, March 2027: each night from local noon to the next noon
Night	Civil	Astronomical	Moon-free dark	Moon-free, 10 PM to 2 AM	Moon lit
Mon Mar 1	11 h 58 min	8 h 48 min	11 h 29 min	4 h	34%
Tue Mar 2	11 h 53 min	8 h 42 min	11 h 49 min	4 h	25%
Wed Mar 3	11 h 47 min	8 h 37 min	11 h 47 min	4 h	18%
Thu Mar 4	11 h 42 min	8 h 31 min	11 h 42 min	4 h	11%
Fri Mar 5	11 h 37 min	8 h 26 min	11 h 37 min	4 h	6%
Sat Mar 6	11 h 32 min	8 h 20 min	11 h 32 min	4 h	2%
Sun Mar 7	11 h 27 min	8 h 14 min	11 h 27 min	4 h	0%
Mon Mar 8	11 h 21 min	8 h 9 min	11 h 21 min	4 h	0%
Tue Mar 9	11 h 16 min	8 h 3 min	10 h 12 min	4 h	3%
Wed Mar 10	11 h 11 min	7 h 57 min	8 h 40 min	4 h	7%
Thu Mar 11	11 h 6 min	7 h 51 min	7 h 4 min	3 h 32 min	13%
Fri Mar 12	11 h	7 h 45 min	5 h 23 min	1 h 54 min	22%
Sat Mar 13	10 h 55 min	7 h 38 min	3 h 42 min	16 min	31%
Sun Mar 14	10 h 50 min	7 h 32 min	2 h 11 min	0 min	42%
Mon Mar 15	10 h 44 min	7 h 26 min	1 h 7 min	0 min	53%
Tue Mar 16	10 h 39 min	7 h 20 min	31 min	0 min	65%
Wed Mar 17	10 h 34 min	7 h 13 min	12 min	0 min	75%
Thu Mar 18	10 h 28 min	7 h 7 min	1 min	0 min	84%
Fri Mar 19	10 h 23 min	7 h	0 min	0 min	92%
Sat Mar 20	10 h 17 min	6 h 53 min	0 min	0 min	97%
Sun Mar 21	10 h 12 min	6 h 46 min	0 min	0 min	100%
Mon Mar 22	10 h 6 min	6 h 39 min	0 min	0 min	100%
Tue Mar 23	10 h 1 min	6 h 32 min	1 h 28 min	0 min	97%
Wed Mar 24	9 h 55 min	6 h 25 min	3 h 2 min	0 min	92%
Thu Mar 25	9 h 50 min	6 h 18 min	4 h 36 min	1 h 36 min	86%
Fri Mar 26	9 h 44 min	6 h 11 min	6 h 6 min	3 h 9 min	78%
Sat Mar 27	9 h 39 min	6 h 3 min	7 h 24 min	3 h	70%
Sun Mar 28	9 h 33 min	5 h 56 min	8 h 18 min	4 h	61%
Mon Mar 29	9 h 28 min	5 h 48 min	8 h 46 min	4 h	51%
Tue Mar 30	9 h 22 min	5 h 40 min	8 h 59 min	4 h	42%
Wed Mar 31	9 h 17 min	5 h 32 min	9 h 5 min	4 h	33%

Moon lit: SunCalc illuminated fraction at the middle of the 10 PM to 2 AM window.

Questions

Can you see the northern lights in Södertälje in March?: On dark, clear nights with enough activity. 31 of 31 nights at Södertälje have civil darkness, and 12% of past March days reached Kp 5.
How dark is Södertälje in March?: Södertälje averages 10.6 hours of civil night a night in March 2027, from 11 h 58 min on the 1st to 9 h 17 min on the last night.
How cloudy is Södertälje in March?: NASA POWER's 2001 to 2020 climatology gives Södertälje's 1 degree cell 76% mean cloud in March, against 75% for the whole year. It is an all-hours average, not a forecast.
What is the best night in March 2027 for aurora in Södertälje?: By darkness and moon alone, Mar 1, with 4 h of moon-free darkness inside 10 PM to 2 AM at Södertälje. Activity on that date will only be known hours ahead.
Is March or April better in Södertälje?: By civil night times the clear share, March scores 2.6 hours at Södertälje and April 2.3. March comes out ahead.

Sources and verification

SunCalchttps://github.com/mourner/suncalc
NASA POWER climatologyhttps://power.larc.nasa.gov/docs/services/api/temporal/climatology/
GFZ Potsdam Kp indexhttps://kp.gfz.de/en/data
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.