GoodSeeing
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Phichit

16.442° N   100.349° E  ·  44 M
48 /100
PEAK
Marginal, but there is a 2 hours gap from 01:00.
BEST WINDOW 01:00–03:00 · ASTRO DARK 00:00–05:00 · MOON 0%
Transparency
0.22
Seeing
1.00
Cloud
32%
Moon
0%

Fair tonight

Hour by hour, local to Phichit. 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
19
48
46
30
32
26
0
BEST WINDOW
Low cloud
9%
8%
7%
16%
17%
14%
5%
Mid cloud
76%
15%
20%
38%
41%
32%
6%
High cloud
12%
20%
19%
34%
20%
31%
33%
Transparency
0.22
0.20
0.19
0.19
0.20
0.21
0.22
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
00 Poor · 19/100
Starting from
100
Cloud
−73
Transparency
−9
Seeing
−0
Moonlight
−0
Darkness
−0
Score
19
CLOUD 79% LOW 9% MID 76% HIGH 12% SUN -58.1° MOON -56.9° / 0% WIND 1 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 00:30 · OBSERVE 01:00–03:00 · 2H · MEAN 46

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

00020406
CLOUD BREAKS 01:00CLOUD RETURNS 03:00
SET UP 00:30 · OBSERVE 01:00–06:00 · 5H · MEAN 47

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

00020406
CLOUD BREAKS 01:00TWILIGHT BEGINS 06:00MOONLIGHT IGNORED FOR THIS TARGET
SET UP 00:30 · OBSERVE 01:00–03:00 · 2H · MEAN 41

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

00020406
CLOUD BREAKS 01:00CLOUD RETURNS 03:00
NO USABLE WINDOW FOR THIS TARGET TONIGHT

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

00020406
CONDITIONS STAY BELOW THE USABLE THRESHOLD
SET UP 00:30 · OBSERVE 01:00–03:00 · 2H · MEAN 47

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

00020406
CLOUD BREAKS 01:00CLOUD RETURNS 03:00
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The next week of nights

Tonight · 12 Aug
48
Fair
MOON 0%
01:00–03:00
Tomorrow · 13 Aug
31
Poor
MOON 1%
Friday · 14 Aug
51
Fair
MOON 5%
00:00–02:00
Saturday · 15 Aug
20
Poor
MOON 10%
Sunday · 16 Aug
12
Clouded out
MOON 19%
Monday · 17 Aug
24
Poor
MOON 28%
Tuesday · 18 Aug
19
Poor
MOON 37%
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Nearby locations

About this forecast

Conditions for Phichit, 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 →