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Menghuan

24.435° N   98.584° E  ·  938 M
42 /100
PEAK
Marginal, but there is a 1 hour gap from 01:00.
BEST WINDOW 01:00–02:00 · ASTRO DARK 01:00–06:00 · MOON 0%
Transparency
0.28
Seeing
1.00
Cloud
41%
Moon
0%

Fair tonight

Hour by hour, local to Menghuan. 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
07
42
34
34
10
1
7
0
BEST WINDOW
Low cloud
33%
40%
29%
73%
98%
68%
87%
Mid cloud
13%
20%
31%
38%
25%
18%
7%
High cloud
0%
2%
7%
25%
36%
54%
44%
Transparency
0.28
0.25
0.21
0.10
0.10
0.10
0.18
Seeing
1.00
1.00
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
01 Fair · 42/100
Starting from
100
Cloud
−41
Transparency
−17
Seeing
−0
Moonlight
−0
Darkness
−0
Score
42
CLOUD 41% LOW 33% MID 13% HIGH 0% SUN -49.9° MOON -48.7° / 0% WIND 1 TEMP 23°
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 00:30 · OBSERVE 01:00–02:00 · 1H · MEAN 42

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

01030507
SET UP 00:30 · OBSERVE 01:00–04:00 · 3H · MEAN 45

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

01030507
CLOUD RETURNS 04:00MOONLIGHT IGNORED FOR THIS TARGET
SET UP 00:30 · OBSERVE 01:00–02:00 · 1H · MEAN 39

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

01030507
NO USABLE WINDOW FOR THIS TARGET TONIGHT

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

01030507
CLOUD NEVER DROPS BELOW 41%
SET UP 00:30 · OBSERVE 01:00–02:00 · 1H · MEAN 40

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

01030507
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The next week of nights

Tonight · 12 Aug
42
Fair
MOON 0%
01:00–02:00
Tomorrow · 13 Aug
24
Poor
MOON 1%
Friday · 14 Aug
17
Poor
MOON 5%
Saturday · 15 Aug
6
Clouded out
MOON 10%
Sunday · 16 Aug
2
Clouded out
MOON 19%
Monday · 17 Aug
1
Clouded out
MOON 28%
Tuesday · 18 Aug
23
Poor
MOON 37%
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Nearby locations

About this forecast

Conditions for Menghuan, 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 →