Can you see the northern lights in Nesttun in July?

On dark, clear nights with enough activity. 31 of 31 nights at Nesttun have civil darkness, and 43% of past July days reached Kp 3.

How dark is Nesttun in July?

Nesttun averages 2.9 hours of civil night a night in July 2027, from 46 min on the 1st to 4 h 44 min on the last night.

How cloudy is Nesttun in July?

NASA POWER's 2001 to 2020 climatology gives Nesttun's 1 degree cell 78% mean cloud in July, against 79% for the whole year. It is an all-hours average, not a forecast.

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

By darkness and moon alone, Jul 31, with 2 h 37 min of moon-free darkness inside 10 PM to 2 AM at Nesttun. Activity on that date will only be known hours ahead.

Is July or August better in Nesttun?

By civil night times the clear share, July scores 0.6 hours at Nesttun and August 1.3. August comes out ahead.

Nesttun · July 2027

Northern lights in Nesttun in July 2027

Answer

July gives Nesttun 2.8 hours of civil night on the 15th, the 11th darkest of its 12 months, under 78% mean cloud. 43% of July days since 1996 reached Kp 3, enough for the oval edge to reach Nesttun.

2.9 h

civil night, average night

SunCalc for 60.32, 5.35; NASA POWER; GFZ Kp

July against the rest of the year

2.5

2.4

2.1

1.2

0.0

0.6

1.3

2.0

2.6

2.7

2.4

July cloud at Nesttun averages 78% in NASA POWER's 2001 to 2020 record, close to its yearly mean of 79%. May is Nesttun's clearest month at 71%. By civil night times clear sky, July scores 0.6 hours at Nesttun, 11th of 12. Bergen, 8 km away, averages the same 78%.

Civil night at Nesttun starts July at 46 min and reaches 4 h 44 min by July 31 as the nights lengthen by 4.0 hours. No night keeps the 10 PM to 2 AM window fully dark at Nesttun. The sun never reaches 18 degrees down, so Nesttun gets no astronomical night in July.

July night by night

July opens toward a new moon on Jul 4, with full moon on Jul 18, in Europe/Oslo dates. Nesttun gets 33 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: Jul 31 (2 h 37 min), Jul 30 (1 h 54 min), Jul 13 (1 h 32 min).

1
7% lit
0.3 h
2
2% lit
0.9 h
3
0% lit
1.1 h
4
1% lit
1.3 h
New
5
5% lit
1.4 h
6
11% lit
1.6 h
7
20% lit
1.7 h
8
30% lit
1.9 h
9
41% lit
2.0 h
10
52% lit
2.1 h
11
62% lit
2.3 h
12
72% lit
2.4 h
13
80% lit
2.5 h
14
88% lit
2.6 h
15
93% lit
2.0 h
16
97% lit
0.9 h
17
99% lit
0.0 h
18
100% lit
0.0 h
Full
19
99% lit
0.0 h
20
96% lit
0.0 h
21
91% lit
0.0 h
22
84% lit
0.0 h
23
77% lit
0.0 h
24
68% lit
0.0 h
25
58% lit
0.0 h
26
48% lit
0.0 h
27
37% lit
0.0 h
28
27% lit
0.0 h
29
17% lit
0.6 h
30
9% lit
1.9 h
31
3% lit
3.7 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 Julys

Nesttun needs Kp 3 for the average oval edge to sit overhead. 403 of the 930 July 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 9%. Nesttun sits at 60.9 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.

July across Norway

Nesttun ranks 6th in Norway for civil night on July 15, behind Kristiansand at 4.1 hours. Coming from June (0.0 hours at Nesttun), July adds darkness, and the nights keep growing into August (6.4 hours on the 15th).

Civil night on July 15 and July cloud, month-page towns in Norway
Town	Civil night	Cloud
Kristiansand	4.1 h	70%
Stavanger	3.7 h	78%
Haugesund	3.4 h	78%
Drammen	3.2 h	71%
Oslo	3.1 h	71%
Nesttun	2.8 h	78%
Bergen	2.8 h	78%
Hamar	2.4 h	73%
Gjøvik	2.4 h	73%
Lillehammer	2.1 h	76%
Tromsø	0.0 h	79%
Trondheim	0.0 h	78%

Darkness and moon, every night

Nesttun, July 2027: each night from local noon to the next noon
Night	Civil	Moon-free dark	Moon-free, 10 PM to 2 AM	Moon lit
Thu Jul 1	46 min	15 min	15 min	7%
Fri Jul 2	57 min	57 min	46 min	2%
Sat Jul 3	1 h 8 min	1 h 8 min	51 min	0%
Sun Jul 4	1 h 17 min	1 h 17 min	55 min	1%
Mon Jul 5	1 h 27 min	1 h 27 min	1 h	5%
Tue Jul 6	1 h 35 min	1 h 35 min	1 h 4 min	11%
Wed Jul 7	1 h 44 min	1 h 44 min	1 h 8 min	20%
Thu Jul 8	1 h 52 min	1 h 52 min	1 h 12 min	30%
Fri Jul 9	2 h 1 min	2 h 1 min	1 h 16 min	41%
Sat Jul 10	2 h 9 min	2 h 9 min	1 h 20 min	52%
Sun Jul 11	2 h 17 min	2 h 17 min	1 h 24 min	62%
Mon Jul 12	2 h 25 min	2 h 25 min	1 h 28 min	72%
Tue Jul 13	2 h 32 min	2 h 32 min	1 h 32 min	80%
Wed Jul 14	2 h 40 min	2 h 36 min	1 h 31 min	88%
Thu Jul 15	2 h 48 min	1 h 59 min	50 min	93%
Fri Jul 16	2 h 55 min	53 min	0 min	97%
Sat Jul 17	3 h 3 min	0 min	0 min	99%
Sun Jul 18	3 h 11 min	0 min	0 min	100%
Mon Jul 19	3 h 18 min	0 min	0 min	99%
Tue Jul 20	3 h 25 min	0 min	0 min	96%
Wed Jul 21	3 h 33 min	0 min	0 min	91%
Thu Jul 22	3 h 40 min	0 min	0 min	84%
Fri Jul 23	3 h 47 min	0 min	0 min	77%
Sat Jul 24	3 h 54 min	0 min	0 min	68%
Sun Jul 25	4 h 2 min	0 min	0 min	58%
Mon Jul 26	4 h 9 min	0 min	0 min	48%
Tue Jul 27	4 h 16 min	0 min	0 min	37%
Wed Jul 28	4 h 23 min	0 min	0 min	27%
Thu Jul 29	4 h 30 min	38 min	38 min	17%
Fri Jul 30	4 h 37 min	1 h 54 min	1 h 54 min	9%
Sat Jul 31	4 h 44 min	3 h 42 min	2 h 37 min	3%

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

Questions

Can you see the northern lights in Nesttun in July?: On dark, clear nights with enough activity. 31 of 31 nights at Nesttun have civil darkness, and 43% of past July days reached Kp 3.
How dark is Nesttun in July?: Nesttun averages 2.9 hours of civil night a night in July 2027, from 46 min on the 1st to 4 h 44 min on the last night.
How cloudy is Nesttun in July?: NASA POWER's 2001 to 2020 climatology gives Nesttun's 1 degree cell 78% mean cloud in July, against 79% for the whole year. It is an all-hours average, not a forecast.
What is the best night in July 2027 for aurora in Nesttun?: By darkness and moon alone, Jul 31, with 2 h 37 min of moon-free darkness inside 10 PM to 2 AM at Nesttun. Activity on that date will only be known hours ahead.
Is July or August better in Nesttun?: By civil night times the clear share, July scores 0.6 hours at Nesttun and August 1.3. 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.