GoodSeeing
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Yonago

35.433° N   133.333° E  ·  9 M
51 /100
PEAK
Marginal, but there is a 3 hours gap from 02:00.
BEST WINDOW 02:00–05:00 · ASTRO DARK 02:00–04:00 · MOON 0%
Transparency
0.42
Seeing
0.87
Cloud
32%
Moon
0%

Fair tonight

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

Sky state
Lighter = daylight and twilight  ·  unshaded = astronomical dark
Score
02
03
04
05
51
50
38
0
BEST WINDOW
Low cloud
19%
19%
28%
23%
Mid cloud
17%
18%
16%
21%
High cloud
0%
0%
1%
2%
Transparency
0.42
0.42
0.40
0.40
Seeing
0.83
0.81
0.87
0.84
Moon clear
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
02 Fair · 51/100
Starting from
100
Cloud
−31
Transparency
−16
Seeing
−2
Moonlight
−0
Darkness
−0
Score
51
CLOUD 32% LOW 19% MID 17% HIGH 0% SUN -33.5° MOON -33.2° / 0% WIND 4 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 01:30 · OBSERVE 02:00–05:00 · 3H · MEAN 46

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

0204
TWILIGHT BEGINS 05:00
SET UP 01:30 · OBSERVE 02:00–05:00 · 3H · MEAN 53

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

0204
TWILIGHT BEGINS 05:00MOONLIGHT IGNORED FOR THIS TARGET
SET UP 01:30 · OBSERVE 02:00–05:00 · 3H · MEAN 45

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

0204
TWILIGHT BEGINS 05:00
SET UP 01:30 · OBSERVE 02:00–04:00 · 2H · MEAN 38

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

0204
SET UP 01:30 · OBSERVE 02:00–05:00 · 3H · MEAN 46

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

0204
TWILIGHT BEGINS 05:00
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The next week of nights

Tonight · 12 Aug
51
Fair
MOON 0%
02:00–05:00
Tomorrow · 13 Aug
57
Good
MOON 1%
21:00–05:00
Friday · 14 Aug
32
Poor
MOON 5%
Saturday · 15 Aug
30
Poor
MOON 8%
Sunday · 16 Aug
52
Fair
MOON 19%
21:00–22:00
Monday · 17 Aug
26
Poor
MOON 28%
Tuesday · 18 Aug
28
Poor
MOON 37%
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Nearby locations

About this forecast

Conditions for Yonago, Japan 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 →