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Nørresundby

57.059° N   9.923° E  ·  10 M
70 /100
PEAK
Worth setting up — 2 hours of workable sky from 01:00.
BEST WINDOW 01:00–03:00 · NO ASTRO DARK · MOON 0%
Transparency
0.64
Seeing
1.00
Cloud
10%
Moon
0%
At this latitude the sun never drops 18° below the horizon tonight, so astronomical darkness never arrives. Scores reflect the deepest twilight available.

Good tonight

Hour by hour, local to Nørresundby. Colour encodes the score and nothing else; every other measurement is luminance.

Sky state
Lighter = daylight and twilight  ·  unshaded = astronomical dark
Score
21
22
23
00
01
02
03
04
05
0
1
30
53
66
70
50
31
0
BEST WINDOW
Low cloud
0%
0%
0%
0%
0%
0%
0%
0%
0%
Mid cloud
39%
13%
0%
0%
0%
0%
0%
0%
0%
High cloud
94%
78%
44%
33%
23%
10%
30%
11%
88%
Transparency
0.71
0.64
0.53
0.46
0.42
0.40
0.38
0.35
0.35
Seeing
1.00
1.00
1.00
1.00
1.00
1.00
1.00
1.00
1.00
Moon clear
0%
down
down
down
down
down
down
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Inspect

Cloud tracks show clear sky — a longer bar is better. The figure inside each track is the raw measurement.

Why this hour scored what it did
21 Clouded out · 0/100
Starting from
100
Cloud
−68
Transparency
−4
Seeing
−0
Moonlight
−0
Darkness
−28
Score
0
CLOUD 94% LOW 0% MID 39% HIGH 94% SUN 0.3° MOON 2.2° / 0% WIND 2 TEMP 19°
Excellent 75+ Good 55+ Fair 35+ Poor 15+ Not worth it Seeing is estimated from surface wind — see how we score.

What are you doing tonight?

The same forecast, weighted for the target. Planetary work barely cares about moonlight; long exposures die on high cloud a visual observer would never notice.

SET UP 23:30 · OBSERVE 00:00–04:00 · 4H · MEAN 56

Darkness and moonlight dominate. Faint fuzzies need a genuinely dark sky more than they need steady air.

2123010305
TWILIGHT BEGINS 04:00
SET UP 22:30 · OBSERVE 23:00–05:00 · 6H · MEAN 71

Seeing is everything and moonlight is irrelevant. Bright targets punch through twilight, so darkness barely counts.

2123010305
HIGH CLOUD CLEARS 23:00CLOUD RETURNS 05:00MOONLIGHT IGNORED FOR THIS TARGET
SET UP 23:30 · OBSERVE 00:00–04:00 · 4H · MEAN 52

Tolerates soft seeing, but high cloud wrecks a wide frame and moonlight raises the background everywhere.

2123010305
TWILIGHT BEGINS 04:00
SET UP 23:30 · OBSERVE 00:00–03:00 · 3H · MEAN 47

Needs conditions to hold still for hours. Sustained transparency matters more than any single good hour.

2123010305
CLOUD RETURNS 03:00
SET UP 23:30 · OBSERVE 00:00–04:00 · 4H · MEAN 57

Naked eye, whole sky. Total cloud and moonlight are the only things that count.

2123010305
TWILIGHT BEGINS 04:00
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The next week of nights

Tonight · 12 Aug
70
Good
MOON 0%
01:00–03:00
Tomorrow · 13 Aug
72
Good
MOON 2%
01:00–03:00
Friday · 14 Aug
62
Good
MOON 6%
00:00–03:00
Saturday · 15 Aug
50
Fair
MOON 13%
02:00–03:00
Sunday · 16 Aug
54
Fair
MOON 21%
02:00–03:00
Monday · 17 Aug
37
Fair
MOON 30%
02:00–03:00
Tuesday · 18 Aug
36
Fair
MOON 39%
02:00–03:00
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Nearby locations

About this forecast

Conditions for Nørresundby, Denmark are computed from the MET Norway forecast model for these exact coordinates, combined with sun and moon positions we calculate directly. The score weighs cloud cover by layer, atmospheric transparency, estimated seeing, moonlight and how dark the sky actually gets. Read the full method →