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Ubon Ratchathani

15.238° N   104.849° E  ·  125 M
64 /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
0.40
Seeing
0.81
Cloud
15%
Moon
0%

Good tonight

Hour by hour, local to Ubon Ratchathani. 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
56
64
61
53
54
29
0
BEST WINDOW
Low cloud
0%
0%
0%
0%
0%
0%
0%
Mid cloud
4%
1%
0%
0%
1%
1%
0%
High cloud
33%
14%
25%
46%
42%
15%
10%
Transparency
0.38
0.37
0.37
0.38
0.39
0.40
0.39
Seeing
0.73
0.74
0.76
0.78
0.77
0.81
0.83
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 · 56/100
Starting from
100
Cloud
−21
Transparency
−20
Seeing
−4
Moonlight
−0
Darkness
−0
Score
56
CLOUD 36% LOW 0% MID 4% HIGH 33% SUN -59.8° MOON -58.7° / 0% WIND 5 TEMP 27°
Excellent 75+ Good 55+ Fair 35+ Poor 15+ Not worth it Seeing is estimated from surface wind — see how we score.
Tonight's limiting factor
Conditions for planets and the Moon

Seeing is everything. Darkness and moonlight barely matter, and a hazy, humid night that ruins deep-sky work is often the steadiest night of the year for planetary detail.

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 58

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

00020406
TWILIGHT BEGINS 05:00
SET UP 23:30 · OBSERVE 00:00–06:00 · 6H · MEAN 62

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

00020406
TWILIGHT BEGINS 06:00MOONLIGHT IGNORED FOR THIS TARGET
SET UP 23:30 · OBSERVE 00:00–05:00 · 5H · MEAN 52

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

00020406
TWILIGHT BEGINS 05:00
SET UP 23:30 · OBSERVE 00:00–03:00 · 3H · MEAN 45

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

00020406
CLOUD RETURNS 03:00
SET UP 23:30 · OBSERVE 00:00–05:00 · 5H · MEAN 60

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

00020406
TWILIGHT BEGINS 05:00
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The next week of nights

Tonight · 12 Aug
64
Good
MOON 0%
00:00–05:00
Tomorrow · 13 Aug
39
Fair
MOON 1%
20:00–22:00
Friday · 14 Aug
25
Poor
MOON 5%
Saturday · 15 Aug
6
Clouded out
MOON 10%
Sunday · 16 Aug
21
Poor
MOON 19%
Monday · 17 Aug
3
Clouded out
MOON 28%
Tuesday · 18 Aug
10
Clouded out
MOON 37%
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Nearby locations

About this forecast

Conditions for Ubon Ratchathani, Thailand 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 →