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Zhoujiaba

30.843° N   108.366° E  ·  318 M
43 /100
PEAK
Marginal, but there is a 2 hours gap from 03:00.
BEST WINDOW 03:00–05:00 · ASTRO DARK 01:00–05:00 · MOON 0%
Transparency
0.21
Seeing
1.00
Cloud
38%
Moon
0%

Fair tonight

Hour by hour, local to Zhoujiaba. 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
41
33
39
43
4
0
BEST WINDOW
Low cloud
2%
0%
0%
2%
64%
48%
Mid cloud
43%
57%
48%
37%
36%
7%
High cloud
0%
0%
0%
0%
0%
0%
Transparency
0.21
0.19
0.19
0.17
0.16
0.17
Seeing
1.00
1.00
1.00
1.00
1.00
1.00
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 Fair · 41/100
Starting from
100
Cloud
−40
Transparency
−19
Seeing
−0
Moonlight
−0
Darkness
−0
Score
41
CLOUD 44% LOW 2% MID 43% HIGH 0% SUN -44.2° MOON -43.2° / 0% WIND 1 TEMP 25°
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 02:30 · OBSERVE 03:00–05:00 · 2H · MEAN 41

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

010305
CLOUD RETURNS 05:00
SET UP 00:30 · OBSERVE 01:00–05:00 · 4H · MEAN 50

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 38

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

010305
CLOUD RETURNS 05:00
NO USABLE WINDOW FOR THIS TARGET TONIGHT

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

010305
CONDITIONS STAY BELOW THE USABLE THRESHOLD
SET UP 02:30 · OBSERVE 03:00–05:00 · 2H · MEAN 40

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
43
Fair
MOON 0%
03:00–05:00
Tomorrow · 13 Aug
70
Good
MOON 1%
21:00–23:00
Friday · 14 Aug
80
Excellent
MOON 5%
21:00–05:00
Saturday · 15 Aug
68
Good
MOON 10%
02:00–03:00
Sunday · 16 Aug
33
Poor
MOON 19%
Monday · 17 Aug
3
Clouded out
MOON 28%
Tuesday · 18 Aug
24
Poor
MOON 37%
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Nearby locations

About this forecast

Conditions for Zhoujiaba, 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 →