Can you see the northern lights in Juneau in June?

On dark, clear nights with enough activity. 30 of 30 nights at Juneau have civil darkness, and 43% of past June days reached Kp 3.

How dark is Juneau in June?

Juneau averages 3.0 hours of civil night a night in June 2027, from 3 h 35 min on the 1st to 2 h 59 min on the last night.

How cloudy is Juneau in June?

NASA POWER's 2001 to 2020 climatology gives Juneau's 1 degree cell 81% mean cloud in June, against 79% for the whole year. It is an all-hours average, not a forecast.

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

By darkness and moon alone, Jun 1, with 2 h 52 min of moon-free darkness inside 10 PM to 2 AM at Juneau. Activity on that date will only be known hours ahead.

Is June or July better in Juneau?

By civil night times the clear share, June scores 0.5 hours at Juneau and July 0.8. July comes out ahead.

Juneau · June 2027

Northern lights in Juneau in June 2027

Answer

June gives Juneau 2.8 hours of civil night on the 15th, the lightest month of its year, under 81% mean cloud. 43% of June days since 1996 reached Kp 3, enough for the oval edge to reach Juneau.

3.0 h

civil night, average night

SunCalc for 58.30, -134.42; NASA POWER; GFZ Kp

June against the rest of the year

3.0

3.3

2.6

2.0

1.3

0.5

0.8

1.4

1.9

2.3

3.0

3.1

June cloud at Juneau averages 81% in NASA POWER's 2001 to 2020 record, 2 points cloudier than its yearly mean. May is Juneau's clearest month at 74%. By civil night times clear sky, June scores 0.5 hours at Juneau, 12th of 12. Whitehorse, 271 km away, averages 77%, clearer by 4 points.

Civil night at Juneau starts June at 3 h 35 min and reaches 2 h 59 min by June 30, 0.6 hours shorter. No night keeps the 10 PM to 2 AM window fully dark at Juneau. The sun never reaches 18 degrees down, so Juneau gets no astronomical night in June.

June night by night

June opens toward a new moon on Jun 4, with full moon on Jun 18, in America/Juneau dates. Juneau gets 38 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: Jun 1 (2 h 52 min), Jun 2 (2 h 50 min), Jun 3 (2 h 47 min).

1
8% lit
3.2 h
2
3% lit
3.5 h
3
1% lit
3.4 h
4
1% lit
3.4 h
New
5
3% lit
2.7 h
6
9% lit
2.2 h
7
17% lit
1.9 h
8
27% lit
1.7 h
9
38% lit
1.5 h
10
49% lit
1.4 h
11
60% lit
1.4 h
12
70% lit
1.3 h
13
79% lit
1.1 h
14
87% lit
1.0 h
15
93% lit
0.8 h
16
97% lit
0.4 h
17
99% lit
0.0 h
18
100% lit
0.0 h
Full
19
98% lit
0.0 h
20
95% lit
0.1 h
21
90% lit
0.3 h
22
84% lit
0.4 h
23
77% lit
0.5 h
24
68% lit
0.5 h
25
59% lit
0.6 h
26
49% lit
0.7 h
27
39% lit
0.8 h
28
29% lit
0.9 h
29
19% lit
1.1 h
30
11% lit
1.5 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 Junes

Juneau needs Kp 3 for the average oval edge to sit overhead. 383 of the 900 June days from 1996 to 2025 (43%) reached it in the GFZ Potsdam record, one of the three quietest months for that level; storm days with Kp 5 or more made up 8%. Juneau sits at 61.6 degrees geomagnetic, inside SWPC's 60 to 75 degree band, where aurora can be seen on more than half of all nights. No storm is needed: by SWPC's rule the average oval edge is overhead at Kp 3.

June across United States

Juneau ranks 7th in United States for civil night on June 15, behind Buffalo at 7.4 hours. Coming from May (5.1 hours at Juneau), June loses darkness, and the nights keep growing into July (4.1 hours on the 15th). The June solstice falls on June 21, 06:07 Juneau time.

Civil night on June 15 and June cloud, month-page towns in United States
Town	Civil night	Cloud
Buffalo	7.4 h	61%
Portland, Maine	7.3 h	62%
Minneapolis	7.0 h	58%
Duluth	6.7 h	61%
Fargo	6.7 h	57%
Seattle	6.5 h	68%
Juneau	2.8 h	81%
Anchorage	0.0 h	81%
Fairbanks	0.0 h	73%
Eagle River	0.0 h	81%

Darkness and moon, every night

Juneau, June 2027: each night from local noon to the next noon
Night	Civil	Moon-free dark	Moon-free, 10 PM to 2 AM	Moon lit
Tue Jun 1	3 h 35 min	3 h 14 min	2 h 52 min	8%
Wed Jun 2	3 h 30 min	3 h 27 min	2 h 50 min	3%
Thu Jun 3	3 h 26 min	3 h 26 min	2 h 47 min	1%
Fri Jun 4	3 h 22 min	3 h 22 min	2 h 45 min	1%
Sat Jun 5	3 h 18 min	2 h 41 min	2 h 6 min	3%
Sun Jun 6	3 h 14 min	2 h 10 min	1 h 36 min	9%
Mon Jun 7	3 h 10 min	1 h 52 min	1 h 20 min	17%
Tue Jun 8	3 h 7 min	1 h 40 min	1 h 10 min	27%
Wed Jun 9	3 h 3 min	1 h 32 min	1 h 4 min	38%
Thu Jun 10	3 h	1 h 26 min	59 min	49%
Fri Jun 11	2 h 58 min	1 h 21 min	55 min	60%
Sat Jun 12	2 h 55 min	1 h 15 min	50 min	70%
Sun Jun 13	2 h 53 min	1 h 8 min	44 min	79%
Mon Jun 14	2 h 51 min	59 min	36 min	87%
Tue Jun 15	2 h 49 min	46 min	23 min	93%
Wed Jun 16	2 h 47 min	23 min	1 min	97%
Thu Jun 17	2 h 46 min	0 min	0 min	99%
Fri Jun 18	2 h 45 min	0 min	0 min	100%
Sat Jun 19	2 h 45 min	0 min	0 min	98%
Sun Jun 20	2 h 45 min	7 min	7 min	95%
Mon Jun 21	2 h 45 min	16 min	16 min	90%
Tue Jun 22	2 h 45 min	23 min	23 min	84%
Wed Jun 23	2 h 46 min	27 min	27 min	77%
Thu Jun 24	2 h 47 min	31 min	31 min	68%
Fri Jun 25	2 h 48 min	35 min	35 min	59%
Sat Jun 26	2 h 50 min	40 min	40 min	49%
Sun Jun 27	2 h 52 min	45 min	45 min	39%
Mon Jun 28	2 h 54 min	53 min	53 min	29%
Tue Jun 29	2 h 56 min	1 h 6 min	1 h 6 min	19%
Wed Jun 30	2 h 59 min	1 h 29 min	1 h 29 min	11%

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

Questions

Can you see the northern lights in Juneau in June?: On dark, clear nights with enough activity. 30 of 30 nights at Juneau have civil darkness, and 43% of past June days reached Kp 3.
How dark is Juneau in June?: Juneau averages 3.0 hours of civil night a night in June 2027, from 3 h 35 min on the 1st to 2 h 59 min on the last night.
How cloudy is Juneau in June?: NASA POWER's 2001 to 2020 climatology gives Juneau's 1 degree cell 81% mean cloud in June, against 79% for the whole year. It is an all-hours average, not a forecast.
What is the best night in June 2027 for aurora in Juneau?: By darkness and moon alone, Jun 1, with 2 h 52 min of moon-free darkness inside 10 PM to 2 AM at Juneau. Activity on that date will only be known hours ahead.
Is June or July better in Juneau?: By civil night times the clear share, June scores 0.5 hours at Juneau and July 0.8. July 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.