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Jieshi

22.810° N   115.831° E  ·  9 M
55 /100
PEAK
Worth setting up — 3 hours of workable sky from 02:00.
BEST WINDOW 02:00–05:00 · ASTRO DARK 01:00–05:00 · MOON 0%
Transparency
0.29
Seeing
0.58
Cloud
23%
Moon
0%

Good tonight

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

Sky state
Lighter = daylight and twilight  ·  unshaded = astronomical dark
Score
01
02
03
04
05
06
29
36
55
44
15
0
BEST WINDOW
Low cloud
24%
7%
2%
10%
20%
6%
Mid cloud
3%
6%
3%
4%
32%
21%
High cloud
58%
49%
19%
19%
18%
58%
Transparency
0.10
0.10
0.29
0.10
0.10
0.10
Seeing
0.55
0.53
0.58
0.54
0.48
0.51
Moon clear
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
01 Poor · 29/100
Starting from
100
Cloud
−50
Transparency
−18
Seeing
−4
Moonlight
−0
Darkness
−0
Score
29
CLOUD 69% LOW 24% MID 3% HIGH 58% SUN -51.1° MOON -50.5° / 0% WIND 7 TEMP 29°
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 01:30 · OBSERVE 02:00–05:00 · 3H · MEAN 47

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

010305
CLOUD RETURNS 05:00
SET UP 01:30 · OBSERVE 02:00–05:00 · 3H · MEAN 49

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

010305
CLOUD RETURNS 05:00MOONLIGHT IGNORED FOR THIS TARGET
SET UP 02:30 · OBSERVE 03:00–05:00 · 2H · MEAN 48

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

010305
HIGH CLOUD CLEARS 03:00CLOUD RETURNS 05:00
SET UP 02:30 · OBSERVE 03:00–04:00 · 1H · MEAN 41

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

010305
HIGH CLOUD CLEARS 03:00
SET UP 01:30 · OBSERVE 02:00–05:00 · 3H · MEAN 51

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

010305
CLOUD RETURNS 05:00
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The next week of nights

Tonight · 12 Aug
55
Good
MOON 0%
02:00–05:00
Tomorrow · 13 Aug
51
Fair
MOON 1%
21:00–23:00
Friday · 14 Aug
32
Poor
MOON 5%
Saturday · 15 Aug
5
Clouded out
MOON 10%
Sunday · 16 Aug
32
Poor
MOON 19%
Monday · 17 Aug
34
Poor
MOON 28%
Tuesday · 18 Aug
29
Poor
MOON 37%
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Nearby locations

About this forecast

Conditions for Jieshi, 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 →