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Jieyang

23.542° N   116.366° E  ·  7 M
66 /100
PEAK
Worth setting up — 5 hours of workable sky from 00:00.
BEST WINDOW 00:00–05:00 · ASTRO DARK 00:00–05:00 · MOON 0%
Transparency
0.28
Seeing
1.00
Cloud
10%
Moon
0%

Good tonight

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

Sky state
Lighter = daylight and twilight  ·  unshaded = astronomical dark
Score
00
01
02
03
04
05
06
57
50
50
61
66
26
0
BEST WINDOW
Low cloud
2%
2%
3%
4%
0%
0%
0%
Mid cloud
1%
1%
1%
1%
1%
0%
0%
High cloud
31%
51%
48%
15%
9%
34%
73%
Transparency
0.28
0.28
0.27
0.25
0.24
0.23
0.22
Seeing
0.99
0.98
1.00
1.00
1.00
1.00
1.00
Moon clear
down
down
down
down
down
down
down
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
00 Good · 57/100
Starting from
100
Cloud
−19
Transparency
−23
Seeing
−0
Moonlight
−0
Darkness
−0
Score
57
CLOUD 33% LOW 2% MID 1% HIGH 31% SUN -51.2° MOON -49.9° / 0% WIND 2 TEMP 28°
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 00:00–05:00 · 5H · MEAN 55

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

00020406
CLOUD RETURNS 05:00
SET UP 23:30 · OBSERVE 00:00–06:00 · 6H · MEAN 67

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

00020406
CLOUD RETURNS 06:00MOONLIGHT IGNORED FOR THIS TARGET
SET UP 23:30 · OBSERVE 00:00–05:00 · 5H · MEAN 49

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

00020406
CLOUD RETURNS 05:00
SET UP 02:30 · OBSERVE 03:00–05:00 · 2H · MEAN 47

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

00020406
HIGH CLOUD CLEARS 03:00CLOUD RETURNS 05:00
SET UP 23:30 · OBSERVE 00:00–05:00 · 5H · MEAN 57

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

00020406
CLOUD RETURNS 05:00
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The next week of nights

Tonight · 12 Aug
66
Good
MOON 0%
00:00–05:00
Tomorrow · 13 Aug
44
Fair
MOON 1%
23:00–01:00
Friday · 14 Aug
26
Poor
MOON 5%
Saturday · 15 Aug
32
Poor
MOON 10%
Sunday · 16 Aug
27
Poor
MOON 19%
Monday · 17 Aug
27
Poor
MOON 28%
Tuesday · 18 Aug
30
Poor
MOON 37%
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Nearby locations

About this forecast

Conditions for Jieyang, China 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 →