Can you see the northern lights in Udachny in July?

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

How dark is Udachny in July?

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

How cloudy is Udachny in July?

NASA POWER's 2001 to 2020 climatology gives Udachny's 1 degree cell 65% mean cloud in July, against 60% for the whole year. It is an all-hours average, not a forecast.

What is the best night in July 2027 for aurora in Udachny?

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

Is July or August better in Udachny?

By civil night times the clear share, July scores 0.0 hours at Udachny and August 1.2. August comes out ahead.

Udachny · July 2027

Northern lights in Udachny in July 2027

Answer

Udachny has no civil darkness in July 2027: the sun stays above -6 degrees on all 31 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 66.43, 112.40; NASA POWER; GFZ Kp

July against the rest of the year

9.7

8.2

5.6

2.3

0.0

1.2

2.1

6.8

10.4

July cloud at Udachny averages 65% in NASA POWER's 2001 to 2020 record, 5 points cloudier than its yearly mean. February is Udachny's clearest month at 40%. By civil night times clear sky, July scores 0.0 hours at Udachny, 10th of 12. Talnakh, 1,050 km away, averages 69%, cloudier by 4 points.

The sun never gets 6 degrees below the horizon at Udachny in July 2027, so every night is twilight or daylight. Darkness returns in August: 4.1 hours of civil night by the 15th.

July night by night

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

1
9% lit
no night
2
3% lit
no night
3
0% lit
no night
4
0% lit
no night
New
5
3% lit
no night
6
9% lit
no night
7
17% lit
no night
8
27% lit
no night
9
38% lit
no night
10
48% lit
no night
11
59% lit
no night
12
69% lit
no night
13
78% lit
no night
14
86% lit
no night
15
92% 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
92% lit
no night
22
86% lit
no night
23
79% lit
no night
24
71% lit
no night
25
61% lit
no night
26
51% lit
no night
27
40% lit
no night
28
30% lit
no night
29
20% lit
no night
30
11% lit
no night
31
5% 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 Julys

Udachny needs Kp 5 for the average oval edge to sit overhead. 81 of the 930 July days from 1996 to 2025 (9%) reached it in the GFZ Potsdam record, 8th of 12 months; storm days with Kp 5 or more made up 9%. Udachny sits at 57.2 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.

July across Russia

Udachny ranks 6th in Russia for civil night on July 15, behind Velikiy Novgorod at 3.9 hours. Coming from June (0.0 hours at Udachny), July changes little, and the nights keep growing into August (4.1 hours on the 15th).

Civil night on July 15 and July cloud, month-page towns in Russia
Town	Civil night	Cloud
Velikiy Novgorod	3.9 h	63%
Kolpino	3.2 h	65%
Saint Petersburg	3.1 h	65%
Syktyvkar	1.4 h	63%
Petrozavodsk	1.2 h	70%
Udachny	0.0 h	65%
Arkhangel'sk	0.0 h	65%
Murmansk	0.0 h	75%
Severodvinsk	0.0 h	66%
Norilsk	0.0 h	69%
Noyabrsk	0.0 h	66%
Ukhta	0.0 h	65%

Darkness and moon, every night

Udachny, July 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
Thu Jul 1	0 min	0 min	0 min	0 min	9%
Fri Jul 2	0 min	0 min	0 min	0 min	3%
Sat Jul 3	0 min	0 min	0 min	0 min	0%
Sun Jul 4	0 min	0 min	0 min	0 min	0%
Mon Jul 5	0 min	0 min	0 min	0 min	3%
Tue Jul 6	0 min	0 min	0 min	0 min	9%
Wed Jul 7	0 min	0 min	0 min	0 min	17%
Thu Jul 8	0 min	0 min	0 min	0 min	27%
Fri Jul 9	0 min	0 min	0 min	0 min	38%
Sat Jul 10	0 min	0 min	0 min	0 min	48%
Sun Jul 11	0 min	0 min	0 min	0 min	59%
Mon Jul 12	0 min	0 min	0 min	0 min	69%
Tue Jul 13	0 min	0 min	0 min	0 min	78%
Wed Jul 14	0 min	0 min	0 min	0 min	86%
Thu Jul 15	0 min	0 min	0 min	0 min	92%
Fri Jul 16	0 min	0 min	0 min	0 min	96%
Sat Jul 17	0 min	0 min	0 min	0 min	99%
Sun Jul 18	0 min	0 min	0 min	0 min	100%
Mon Jul 19	0 min	0 min	0 min	0 min	99%
Tue Jul 20	0 min	0 min	0 min	0 min	97%
Wed Jul 21	0 min	0 min	0 min	0 min	92%
Thu Jul 22	0 min	0 min	0 min	0 min	86%
Fri Jul 23	0 min	0 min	0 min	0 min	79%
Sat Jul 24	0 min	0 min	0 min	0 min	71%
Sun Jul 25	0 min	0 min	0 min	0 min	61%
Mon Jul 26	0 min	0 min	0 min	0 min	51%
Tue Jul 27	0 min	0 min	0 min	0 min	40%
Wed Jul 28	0 min	0 min	0 min	0 min	30%
Thu Jul 29	0 min	0 min	0 min	0 min	20%
Fri Jul 30	0 min	0 min	0 min	0 min	11%
Sat Jul 31	0 min	0 min	0 min	0 min	5%

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

Questions

Can you see the northern lights in Udachny in July?: Not in July 2027. The sun stays above -6 degrees every night at Udachny, so there is no civil darkness.
How dark is Udachny in July?: Udachny averages 0.0 hours of civil night a night in July 2027, from 0 min on the 1st to 0 min on the last night.
How cloudy is Udachny in July?: NASA POWER's 2001 to 2020 climatology gives Udachny's 1 degree cell 65% mean cloud in July, against 60% for the whole year. It is an all-hours average, not a forecast.
What is the best night in July 2027 for aurora in Udachny?: No night in July 2027 has moon-free darkness inside 10 PM to 2 AM at Udachny.
Is July or August better in Udachny?: By civil night times the clear share, July scores 0.0 hours at Udachny and August 1.2. August 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.