Can you see the northern lights in Longyearbyen in June?

Not in June 2027. The sun stays above -6 degrees every night at Longyearbyen, so there is no civil darkness.

How dark is Longyearbyen in June?

Longyearbyen averages 0.0 hours of civil night a night in June 2027, from 0 min on the 1st to 0 min on the last night.

How cloudy is Longyearbyen in June?

NASA POWER's 2001 to 2020 climatology gives Longyearbyen's 1 degree cell 81% mean cloud in June, against 76% for the whole year. It is an all-hours average, not a forecast.

What is the best night in June 2027 for aurora in Longyearbyen?

No night in June 2027 has moon-free darkness inside 10 PM to 2 AM at Longyearbyen.

Is June or July better in Longyearbyen?

By civil night times the clear share, June scores 0.0 hours at Longyearbyen and July 0.0. They are level.

Longyearbyen · June 2027

Northern lights in Longyearbyen in June 2027

Answer

Longyearbyen has no civil darkness in June 2027: the sun stays above -6 degrees on all 30 nights. SWPC notes that "It must also be dark so during the summer months at auroral latitudes, the midnight sun prevents auroral observations."

0.0 h

civil night, average night

SunCalc for 78.22, 15.65; NASA POWER; GFZ Kp

June against the rest of the year

6.2

4.5

2.7

0.0

0.9

2.8

5.8

6.2

June cloud at Longyearbyen averages 81% in NASA POWER's 2001 to 2020 record, 5 points cloudier than its yearly mean. April is Longyearbyen's clearest month at 67%. By civil night times clear sky, June scores 0.0 hours at Longyearbyen, 8th of 12. Alta, 945 km away, averages the same 81%.

The sun never gets 6 degrees below the horizon at Longyearbyen in June 2027, so every night is twilight or daylight. July 15 is still without civil night at Longyearbyen.

June night by night

The moon runs its cycle as usual, new on Jun 4 and full on Jun 19, but with no civil night it makes no difference at Longyearbyen in June.

1
11% lit
no night
2
5% lit
no night
3
1% lit
no night
4
0% lit
no night
New
5
2% lit
no night
6
6% lit
no night
7
13% lit
no night
8
23% lit
no night
9
33% lit
no night
10
44% lit
no night
11
55% lit
no night
12
66% lit
no night
13
75% lit
no night
14
84% lit
no night
15
91% lit
no night
16
96% lit
no night
17
99% lit
no night
18
100% lit
no night
19
99% lit
no night
Full
20
97% lit
no night
21
93% lit
no night
22
87% lit
no night
23
80% lit
no night
24
72% lit
no night
25
63% lit
no night
26
53% lit
no night
27
43% lit
no night
28
33% lit
no night
29
23% lit
no night
30
14% lit
no night

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 Junes

Quiet activity already puts the oval edge over Longyearbyen, so storm days matter more: 73 of the 900 June days from 1996 to 2025 (8%) reached Kp 5, 9th of 12 months. Longyearbyen sits at 75.3 degrees geomagnetic, poleward of SWPC's 60 to 75 degree band. The quiet oval can lie south of the town, so aurora often shows low in the southern sky, and storms push the oval farther south.

June across Svalbard and Jan Mayen

Coming from May (0.0 hours at Longyearbyen), June changes little, and July holds about the same. The June solstice falls on June 21, 16:07 Longyearbyen time.

Darkness and moon, every night

Longyearbyen, June 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
Tue Jun 1	0 min	0 min	0 min	0 min	11%
Wed Jun 2	0 min	0 min	0 min	0 min	5%
Thu Jun 3	0 min	0 min	0 min	0 min	1%
Fri Jun 4	0 min	0 min	0 min	0 min	0%
Sat Jun 5	0 min	0 min	0 min	0 min	2%
Sun Jun 6	0 min	0 min	0 min	0 min	6%
Mon Jun 7	0 min	0 min	0 min	0 min	13%
Tue Jun 8	0 min	0 min	0 min	0 min	23%
Wed Jun 9	0 min	0 min	0 min	0 min	33%
Thu Jun 10	0 min	0 min	0 min	0 min	44%
Fri Jun 11	0 min	0 min	0 min	0 min	55%
Sat Jun 12	0 min	0 min	0 min	0 min	66%
Sun Jun 13	0 min	0 min	0 min	0 min	75%
Mon Jun 14	0 min	0 min	0 min	0 min	84%
Tue Jun 15	0 min	0 min	0 min	0 min	91%
Wed Jun 16	0 min	0 min	0 min	0 min	96%
Thu Jun 17	0 min	0 min	0 min	0 min	99%
Fri Jun 18	0 min	0 min	0 min	0 min	100%
Sat Jun 19	0 min	0 min	0 min	0 min	99%
Sun Jun 20	0 min	0 min	0 min	0 min	97%
Mon Jun 21	0 min	0 min	0 min	0 min	93%
Tue Jun 22	0 min	0 min	0 min	0 min	87%
Wed Jun 23	0 min	0 min	0 min	0 min	80%
Thu Jun 24	0 min	0 min	0 min	0 min	72%
Fri Jun 25	0 min	0 min	0 min	0 min	63%
Sat Jun 26	0 min	0 min	0 min	0 min	53%
Sun Jun 27	0 min	0 min	0 min	0 min	43%
Mon Jun 28	0 min	0 min	0 min	0 min	33%
Tue Jun 29	0 min	0 min	0 min	0 min	23%
Wed Jun 30	0 min	0 min	0 min	0 min	14%

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

Questions

Can you see the northern lights in Longyearbyen in June?: Not in June 2027. The sun stays above -6 degrees every night at Longyearbyen, so there is no civil darkness.
How dark is Longyearbyen in June?: Longyearbyen averages 0.0 hours of civil night a night in June 2027, from 0 min on the 1st to 0 min on the last night.
How cloudy is Longyearbyen in June?: NASA POWER's 2001 to 2020 climatology gives Longyearbyen's 1 degree cell 81% mean cloud in June, against 76% for the whole year. It is an all-hours average, not a forecast.
What is the best night in June 2027 for aurora in Longyearbyen?: No night in June 2027 has moon-free darkness inside 10 PM to 2 AM at Longyearbyen.
Is June or July better in Longyearbyen?: By civil night times the clear share, June scores 0.0 hours at Longyearbyen and July 0.0. They are level.

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.