Can you see the northern lights in Juneau in March?

On dark, clear nights with enough activity. 31 of 31 nights at Juneau have civil darkness, and 58% of past March days reached Kp 3.

How dark is Juneau in March?

Juneau averages 10.6 hours of civil night a night in March 2027, from 11 h 55 min on the 1st to 9 h 19 min on the last night.

How cloudy is Juneau in March?

NASA POWER's 2001 to 2020 climatology gives Juneau's 1 degree cell 76% mean cloud in March, against 79% for the whole year. It is an all-hours average, not a forecast.

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

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

Is March or April better in Juneau?

By civil night times the clear share, March scores 2.6 hours at Juneau and April 2.0. March comes out ahead.

Juneau · March 2027

Northern lights in Juneau in March 2027

Answer

March gives Juneau 10.7 hours of civil night on the 15th, the 6th darkest of its 12 months, under 76% mean cloud. 58% of March days since 1996 reached Kp 3, enough for the oval edge to reach Juneau.

10.6 h

civil night, average night

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

March 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

March cloud at Juneau averages 76% in NASA POWER's 2001 to 2020 record, 3 points clearer than its yearly mean. May is Juneau's clearest month at 74%. By civil night times clear sky, March scores 2.6 hours at Juneau, 5th of 12. Whitehorse, 271 km away, averages 60%, clearer by 16 points.

Civil night at Juneau starts March at 11 h 55 min and reaches 9 h 19 min by March 31, 2.6 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 7.5 hours on the 15th.

March night by night

March opens toward a new moon on Mar 8, with full moon on Mar 22, in America/Juneau dates. Juneau gets 189 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
30% lit
11.4 h
2
22% lit
11.7 h
3
15% lit
11.8 h
4
9% lit
11.7 h
5
4% lit
11.6 h
6
1% lit
11.5 h
7
0% lit
11.4 h
8
1% lit
11.1 h
New
9
4% lit
9.6 h
10
9% lit
8.1 h
11
17% lit
6.5 h
12
25% lit
4.8 h
13
35% lit
3.2 h
14
46% lit
1.9 h
15
58% lit
1.0 h
16
69% lit
0.5 h
17
79% lit
0.2 h
18
88% lit
0.0 h
19
94% lit
0.0 h
20
98% lit
0.0 h
21
100% lit
0.0 h
22
99% lit
0.6 h
Full
23
95% lit
2.1 h
24
90% lit
3.6 h
25
83% lit
5.1 h
26
75% lit
6.5 h
27
66% lit
7.6 h
28
57% lit
8.3 h
29
47% lit
8.8 h
30
38% lit
8.9 h
31
29% 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

Juneau needs Kp 3 for the average oval edge to sit overhead. 537 of the 930 March days from 1996 to 2025 (58%) 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%. 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.

March across United States

Juneau ranks 7th in United States for civil night on March 15, behind Seattle at 11.0 hours. Coming from February (13.0 hours at Juneau), March loses darkness, and April brings shorter nights (7.9 hours on the 15th). The March equinox falls on March 20, 12:25 Juneau time, inside the weeks SWPC links with larger storms.

Civil night on March 15 and March cloud, month-page towns in United States
Town	Civil night	Cloud
Seattle	11.0 h	79%
Minneapolis	11.0 h	67%
Buffalo	11.0 h	74%
Duluth	11.0 h	62%
Portland, Maine	11.0 h	62%
Fargo	11.0 h	66%
Juneau	10.7 h	76%
Anchorage	10.6 h	63%
Eagle River	10.6 h	63%
Fairbanks	10.4 h	51%

Darkness and moon, every night

Juneau, 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 55 min	8 h 50 min	11 h 26 min	4 h	30%
Tue Mar 2	11 h 50 min	8 h 45 min	11 h 44 min	4 h	22%
Wed Mar 3	11 h 45 min	8 h 39 min	11 h 45 min	4 h	15%
Thu Mar 4	11 h 40 min	8 h 34 min	11 h 40 min	4 h	9%
Fri Mar 5	11 h 35 min	8 h 29 min	11 h 35 min	4 h	4%
Sat Mar 6	11 h 30 min	8 h 23 min	11 h 30 min	4 h	1%
Sun Mar 7	11 h 25 min	8 h 17 min	11 h 25 min	4 h	0%
Mon Mar 8	11 h 20 min	8 h 12 min	11 h 4 min	4 h	1%
Tue Mar 9	11 h 15 min	8 h 6 min	9 h 36 min	4 h	4%
Wed Mar 10	11 h 10 min	8 h 1 min	8 h 4 min	4 h	9%
Thu Mar 11	11 h 4 min	7 h 55 min	6 h 28 min	2 h 49 min	17%
Fri Mar 12	10 h 59 min	7 h 49 min	4 h 49 min	1 h 13 min	25%
Sat Mar 13	10 h 54 min	7 h 43 min	3 h 13 min	0 min	35%
Sun Mar 14	10 h 49 min	7 h 37 min	1 h 54 min	0 min	46%
Mon Mar 15	10 h 44 min	7 h 31 min	1 h 1 min	0 min	58%
Tue Mar 16	10 h 39 min	7 h 25 min	31 min	0 min	69%
Wed Mar 17	10 h 33 min	7 h 19 min	14 min	0 min	79%
Thu Mar 18	10 h 28 min	7 h 12 min	2 min	0 min	88%
Fri Mar 19	10 h 23 min	7 h 6 min	0 min	0 min	94%
Sat Mar 20	10 h 18 min	7 h	0 min	0 min	98%
Sun Mar 21	10 h 13 min	6 h 53 min	0 min	0 min	100%
Mon Mar 22	10 h 7 min	6 h 47 min	33 min	0 min	99%
Tue Mar 23	10 h 2 min	6 h 40 min	2 h 5 min	7 min	95%
Wed Mar 24	9 h 57 min	6 h 33 min	3 h 37 min	1 h 42 min	90%
Thu Mar 25	9 h 51 min	6 h 26 min	5 h 7 min	3 h 15 min	83%
Fri Mar 26	9 h 46 min	6 h 19 min	6 h 31 min	4 h	75%
Sat Mar 27	9 h 41 min	6 h 12 min	7 h 38 min	4 h	66%
Sun Mar 28	9 h 35 min	6 h 5 min	8 h 21 min	4 h	57%
Mon Mar 29	9 h 30 min	5 h 58 min	8 h 45 min	4 h	47%
Tue Mar 30	9 h 25 min	5 h 50 min	8 h 57 min	4 h	38%
Wed Mar 31	9 h 19 min	5 h 43 min	9 h 3 min	4 h	29%

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 March?: On dark, clear nights with enough activity. 31 of 31 nights at Juneau have civil darkness, and 58% of past March days reached Kp 3.
How dark is Juneau in March?: Juneau averages 10.6 hours of civil night a night in March 2027, from 11 h 55 min on the 1st to 9 h 19 min on the last night.
How cloudy is Juneau in March?: NASA POWER's 2001 to 2020 climatology gives Juneau's 1 degree cell 76% mean cloud in March, against 79% for the whole year. It is an all-hours average, not a forecast.
What is the best night in March 2027 for aurora in Juneau?: By darkness and moon alone, Mar 1, with 4 h of moon-free darkness inside 10 PM to 2 AM at Juneau. Activity on that date will only be known hours ahead.
Is March or April better in Juneau?: By civil night times the clear share, March scores 2.6 hours at Juneau and April 2.0. 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.