Can you see the northern lights in Sydney in January?

On dark, clear nights with enough activity. 31 of 31 nights at Sydney have civil darkness, and 2% of past January days reached Kp 6.

How dark is Sydney in January?

Sydney averages 13.7 hours of civil night a night in January 2027, from 14 h 2 min on the 1st to 13 h 10 min on the last night.

How cloudy is Sydney in January?

NASA POWER's 2001 to 2020 climatology gives Sydney's 1 degree cell 88% mean cloud in January, against 75% for the whole year. It is an all-hours average, not a forecast.

What is the best night in January 2027 for aurora in Sydney?

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

Is January or February better in Sydney?

By civil night times the clear share, January scores 1.6 hours at Sydney and February 2.3. February comes out ahead.

Sydney · January 2027

Northern lights in Sydney in January 2027

Answer

January gives Sydney 13.7 hours of civil night on the 15th, the 2nd darkest of its 12 months, under 88% mean cloud. 2% of January days since 1996 reached Kp 6, enough for the oval edge to reach Sydney.

13.7 h

civil night, average night

SunCalc for 46.14, -60.18; NASA POWER; GFZ Kp

January against the rest of the year

1.6

2.3

2.5

2.2

2.0

2.5

3.0

3.7

3.1

2.3

1.6

January cloud at Sydney averages 88% in NASA POWER's 2001 to 2020 record, 13 points cloudier than its yearly mean. September is Sydney's clearest month at 64%. By civil night times clear sky, January scores 1.6 hours at Sydney, 11th of 12. St. John's, 590 km away, averages 83%, clearer by 5 points.

Civil night at Sydney starts January at 14 h 2 min and reaches 13 h 10 min by January 31, 0.9 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 11.3 hours on the 15th.

January night by night

January opens toward a new moon on Jan 7, with full moon on Jan 22, in America/Glace_Bay dates. Sydney gets 234 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: Jan 1 (4 h), Jan 2 (4 h), Jan 3 (4 h).

1
27% lit
10.2 h
2
19% lit
11.3 h
3
12% lit
12.3 h
4
6% lit
13.3 h
5
3% lit
14.0 h
6
1% lit
13.9 h
7
0% lit
13.9 h
New
8
2% lit
13.8 h
9
5% lit
12.7 h
10
10% lit
11.6 h
11
16% lit
10.5 h
12
24% lit
9.4 h
13
33% lit
8.3 h
14
43% lit
7.1 h
15
53% lit
5.8 h
16
64% lit
4.5 h
17
75% lit
3.2 h
18
84% lit
1.9 h
19
92% lit
0.8 h
20
97% lit
0.0 h
21
100% lit
0.0 h
22
99% lit
0.0 h
Full
23
96% lit
1.2 h
24
90% lit
2.5 h
25
82% lit
3.8 h
26
73% lit
5.0 h
27
63% lit
6.2 h
28
53% lit
7.4 h
29
43% lit
8.6 h
30
34% lit
9.7 h
31
25% lit
10.7 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 Januarys

Sydney needs Kp 6 for the average oval edge to sit overhead. 17 of the 930 January days from 1996 to 2025 (2%) 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 6%. Sydney sits at 55.1 degrees geomagnetic. By SWPC's rule the average oval edge is overhead at Kp 6, and aurora is usually visible on the northern horizon at G1 (Kp 5) or less.

January across Canada

Sydney ranks 23rd in Canada for civil night on January 15, behind Yellowknife at 15.8 hours. Coming from December (14.1 hours at Sydney), January loses darkness, and February brings shorter nights (12.5 hours on the 15th).

Civil night on January 15 and January cloud, month-page towns in Canada
Town	Civil night	Cloud
Yellowknife	15.8 h	56%
Whitehorse	15.4 h	67%
Fort McMurray	14.8 h	66%
Fort St. John	14.8 h	70%
Grande Prairie	14.6 h	71%
Edmonton	14.5 h	71%
Prince Albert	14.4 h	68%
Lloydminster	14.4 h	70%
Saskatoon	14.3 h	68%
Red Deer	14.3 h	71%
Calgary	14.2 h	70%
Winnipeg	14.1 h	64%
Sydney	13.7 h	88%

Darkness and moon, every night

Sydney, January 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
Fri Jan 1	14 h 2 min	11 h 34 min	10 h 9 min	4 h	27%
Sat Jan 2	14 h 2 min	11 h 34 min	11 h 17 min	4 h	19%
Sun Jan 3	14 h 1 min	11 h 33 min	12 h 21 min	4 h	12%
Mon Jan 4	14 h	11 h 32 min	13 h 19 min	4 h	6%
Tue Jan 5	13 h 58 min	11 h 31 min	13 h 58 min	4 h	3%
Wed Jan 6	13 h 57 min	11 h 30 min	13 h 57 min	4 h	1%
Thu Jan 7	13 h 56 min	11 h 29 min	13 h 56 min	4 h	0%
Fri Jan 8	13 h 55 min	11 h 28 min	13 h 51 min	4 h	2%
Sat Jan 9	13 h 53 min	11 h 27 min	12 h 44 min	4 h	5%
Sun Jan 10	13 h 52 min	11 h 25 min	11 h 37 min	4 h	10%
Mon Jan 11	13 h 51 min	11 h 24 min	10 h 30 min	4 h	16%
Tue Jan 12	13 h 49 min	11 h 23 min	9 h 23 min	4 h	24%
Wed Jan 13	13 h 47 min	11 h 21 min	8 h 15 min	3 h 12 min	33%
Thu Jan 14	13 h 46 min	11 h 20 min	7 h 4 min	2 h 2 min	43%
Fri Jan 15	13 h 44 min	11 h 18 min	5 h 50 min	48 min	53%
Sat Jan 16	13 h 42 min	11 h 17 min	4 h 33 min	0 min	64%
Sun Jan 17	13 h 40 min	11 h 15 min	3 h 13 min	0 min	75%
Mon Jan 18	13 h 39 min	11 h 14 min	1 h 55 min	0 min	84%
Tue Jan 19	13 h 37 min	11 h 12 min	48 min	0 min	92%
Wed Jan 20	13 h 35 min	11 h 10 min	0 min	0 min	97%
Thu Jan 21	13 h 33 min	11 h 8 min	0 min	0 min	100%
Fri Jan 22	13 h 30 min	11 h 6 min	0 min	0 min	99%
Sat Jan 23	13 h 28 min	11 h 5 min	1 h 11 min	0 min	96%
Sun Jan 24	13 h 26 min	11 h 3 min	2 h 31 min	0 min	90%
Mon Jan 25	13 h 24 min	11 h 1 min	3 h 48 min	0 min	82%
Tue Jan 26	13 h 22 min	10 h 59 min	5 h 2 min	35 min	73%
Wed Jan 27	13 h 19 min	10 h 56 min	6 h 14 min	1 h 48 min	63%
Thu Jan 28	13 h 17 min	10 h 54 min	7 h 25 min	3 h	53%
Fri Jan 29	13 h 14 min	10 h 52 min	8 h 34 min	4 h	43%
Sat Jan 30	13 h 12 min	10 h 50 min	9 h 40 min	4 h	34%
Sun Jan 31	13 h 10 min	10 h 48 min	10 h 40 min	4 h	25%

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

Questions

Can you see the northern lights in Sydney in January?: On dark, clear nights with enough activity. 31 of 31 nights at Sydney have civil darkness, and 2% of past January days reached Kp 6.
How dark is Sydney in January?: Sydney averages 13.7 hours of civil night a night in January 2027, from 14 h 2 min on the 1st to 13 h 10 min on the last night.
How cloudy is Sydney in January?: NASA POWER's 2001 to 2020 climatology gives Sydney's 1 degree cell 88% mean cloud in January, against 75% for the whole year. It is an all-hours average, not a forecast.
What is the best night in January 2027 for aurora in Sydney?: By darkness and moon alone, Jan 1, with 4 h of moon-free darkness inside 10 PM to 2 AM at Sydney. Activity on that date will only be known hours ahead.
Is January or February better in Sydney?: By civil night times the clear share, January scores 1.6 hours at Sydney and February 2.3. February 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.